Twilight Sparkle and the Distractingly Debauched Dimensional Disturbance

Chapters

Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5

Chapter 1

Twilight Sparkle woke up early.

Too early.

She opened one bleary eye and looked out the window-- the sun hadn't even risen yet. She debated reaching for her phone, but decided against it-- the electronic glare would no doubt be too bright, and the numbers on the clock would no doubt be too early.

She sighed, rolling to her belly to get more comfortable-- at some point during the night, she must have gotten tangled in her blankets and sheets. Not that she needed them-- the town was in the middle of a record-setting heatwave-- even with the sun still down, the unseasonable warmth still lingered like an oversized sweater. Twilight had forgone her typical flannel pajamas, electing to sleep in nothing but a pair of thin cotton panties. She squirmed, trying to get comfortable amongst the pillows and stray books strewn around her bed, but even the light touch of her panties felt sticky and constricting.

“Mmmh.” Twilight murmured to herself. “At least I locked the door ... “ and with that, she slid the loose panties off, kicking them carelessly to a corner of her bedroom. Properly bare, Twilight briefly reveled in her freedom from briefs. She pulled a pillow under her chin and wriggled a bit to get more comfortable--

“Oh.”

The gentle grind of her hips against the mattress kindled an instinctive, lusty response from Twilight's body. Her body burned even hotter- though this time she knew it wasn't from the weather. Twilight bit the inside of her cheek to stifle a moan as she woke up further, becoming more and more aware of her body. Her nipples tightened, rubbing against the cotton of her sheets. Twilight parted her thighs further, luxuriating in the feel of open air on her rapidly moistening lips. She imagined herself waiting for a lover, offering herself to be ... pleasured. Rutted. Fucked.

But Twilight was alone.

She gave another wanton, needy roll of her hips against the mattress, finally sliding one hand down her belly, to the juncture of her legs. As she pushed her fingertips over her swollen lips, Twilight bit back another moan. The feel of her own digits on her pussy both soothed and aroused her increasingly lust-wracked body.

“Just ... relaxing, that's all.” She told herself. “Perfectly healthy for a girl my age to ... indulge herself.” Perhaps it was just coincidence, but the faint justification only stoked the heat between her legs. Why, it was almost her responsibility to play with herself-- there'd be no way she'd be able to study properly in school the next day if her mind kept ... wandering.

Twilight slid a finger into herself.

She bit the corner of her pillow to keep herself from making more noise, and marveled at the familiar (but certainly not routine) feeling of a finger in her pussy. She bit the pillow harder, then slid a second finger in, filling herself. Twilight worked her hand roughly, almost clumsily as she masturbated, fingers delving into her sex, the heel of her palm mashed up against her aching clit.

Twilight breathed deeper, mewling through her mouthful of cotton, and soon pushed herself past the edge of pleasure, sending a delightful surge through her entire body. Twilight gasped for breath, rocking her hips on her fingers over and over again as she felt every nerve in her body light up, from the tips of her fingers all the way to the ends of her wings and tail.

Wait. What?

No sooner had her orgasm subsided, Twilight was left with a new and certainly different perspective on herself. She rolled to her back-- winced as she put pressure on her wings, and then sat up. Looking down the length of her body, she marveled-- sure enough, her long legs were covered with a fine coat of lavender fur, and terminated in hooves instead of feet. Cautious but curious, Twilight brought her hands up to her face-- sure enough, her nose sloped into a short, blunt muzzle, and her ears poked up through her hair.

The equine features felt odd, but familiar-- which was the only thing that kept her from springing to a blind panic. Instead, she went into a self-aware panic. After all, the last time she had wings and a tail was when she had zapped herself into a dimension full of bipedal (and hedonistic) pony people. Had she somehow blasted herself between dimensions in her sleep?

Twilight rushed over to the full length mirror on the back of her bedroom door, and flicked on the light--

--only to see herself. Her normal, eighteen year old self. Gawky, naked, and even more rumpled looking than usual ... but decidedly lacking in hooves or tails or wings. Twilight looked down at herself, ran her fingers over her bare skin, and shook her head.

“Must've ... must've been a weird dream.” She finally concluded, and padded back towards her bed. She flopped onto her decidedly wingless back, and sighed. “Or maybe a fantasy?”

Twilight let a hand drift between her still-sticky thighs.

A few hours of fitful sleep later, Twilight's phone buzzed with her morning alarm. After a quick check in the mirror for any other unexpected equine features (there weren't any), she went through her morning routine: shower, clothes, breakfast. The morning was maddeningly normal-- which only nagged at the back of Twilight's mind. The dream had seemed so real-- Twilight shivered as a cavalcade of naughty memories came to mind. Still, a glance at the clock was enough to make her forget them, however temporarily. She had another school day to deal with, after all. A few hours of proper study would certainly be a more productive use of her brainpower. And so, with barely a few minutes to spare, Twilight slung her backpack over her shoulders and went out to meet another day.

While morning, it was already getting oppressively warm by the time Twilight got to school. She tugged a little at her cotton blouse to keep it from sticking to her skin, and then smiled as she saw her best friends hanging out in the shade of the school building. Sunset was absent-- which honestly wasn't out of the ordinary, given her tendency to run late.

“Hey Twilight!” Applejack took a moment to size the nerdy girl up. “You alright? Ya look like you've been through the wringer.”

“Just, um. Just had a weird dream, that's all.”

“Oh oh oh! Like one of those dreams where you're on a game show but you don't know any of the answers but you keep on getting them right anyway because the game show was rigged by the secret Chihuahua conspiracy because they wanted you to win so they could steal the lifetime supply of doggy treats?” Pinkie Pie grinned. “'cause I have that one all the time.”

“Um, no.” Twilight said, feeling a blush rise to her cheeks. “This one was ... different.”

“Oh man, you had a sexy dream, didn't you?” Rainbow Dash nudged Twilight knowingly. “You wouldn't be making that face if it wasn't sexy!”

“It ... might have been a little hot.” Twilight flushed a brighter red, then tried to hide it with her hands. “But there's nothing wrong with that! I mean, I'm a teenager with an active imagination-- so, y'know, it's natural, right?”

“Twilight.” Rarity set a gentle hand on Twilight's elbow. “Don't let Rainbow's crass questions fluster you so! You needn't tell us anything you're not comfortable with.”

“Thanks, Rarity.” Twilight smiled, and then blinked as she felt her phone buzzing. She plucked her cellphone out of her bag, looking down at the text message displayed.

Sunset: Not feeling well. Called in sick. See you tomorrow.

“Guess that explains that.” Twilight said, and tucked her phone back into place--

--and when she looked up, her friends were naked.

Twilight almost could have justified it as some sort of prank-- Pinkie, at least, surely could undress in a split second ... but that didn't explain the wings, hooves, tails, and other items of improbable equine anatomy her friends now sported. They still lounged around in almost the same poses they had seconds earlier, just now in half-human/half equine form.

Not one of the five did a thing to cover themselves-- Pinkie Pie almost seemed to be flaunting herself with the way she splayed her legs, revealing the crinkled lips of her sex. Applejack and Rainbow Dash bickered and prodded at each other in some minor argument, each escalating elbow or nudge making Applejack's ample tits sway a bit. Even Fluttershy didn't mind showing off her willowy figure as she leaned against the base of the statue. Her hair and tail (tail?) blew gently in the breeze, giving her the vague air of a classical painting.

“Explains what?” Rarity's ears poked from her exquisitely styled hair (at least that was the same, Twilight thought) as she looked curiously at Twilight. Twilight, in the meanwhile, did her best to keep looking at Rarity's face, and not at the tempting expanses of white-furred flesh beneath. Even with a short, blunt muzzle, Rarity looked as elegant as ever-- though this time, her meticulously plucked brows furrowed in concern.“Are you alright, dear?”

“Sunset's not feeling well!” Twilight blurted. “Maybe there's a bug going around?”

“Oh no!” Fluttershy said, voice heavy with concern. She bent at the waist to place a gentle hand on Twilight's forehead to feel her temperature-- and in doing so, the slim pony-girl's pink capped breasts hung down right at Twilight's eye level. Twilight bit at her lower lip and shut her eyes, though more for her own modesty than Fluttershy's.

“You're not as hot as I thought you'd be.” Fluttershy mused.

“I'm not?” Twilight blurted in indignation. Her eyes snapped open-- and there Fluttershy was, only now far more clothed, and far less equine.

“No fever.” Fluttershy shook her head and stood up straight again. “Have you had any other symptoms?”

“I ... uh ... no.” Twilight fiddled with her glasses and looked around as surreptitiously as she could. Her friends were back to normal: human, wingless, and clothed. Despite herself, a pang of disappointment twisted Twilight's belly. “I guess really didn't sleep very well. But, uh, that's what being a teenager's like. Ha ha?”

“Are you sure?” Fluttershy sank down beside Twilight, putting a hand on her shoulder. “If you're not feeling well, maybe you should go see the nurse.”

“Fluttershy's right, darling.” Rarity closed her sketchbook. “You do tend to push yourself too hard.”

“It's fine!” Twilight blurted, and stood up. “I'm fine! Really.” She clutched her backpack to her chest, feeling her cheeks go scarlet. Her five best friends looked up at her with concerned, wide-eyed expressions. Fluttershy even began to sniffle a little.

“Oh. You're not ... mad at us, are you?” Fluttershy trembled. More than usual.

“What? No! I'm not mad, I'm just ... I'm sorry I snapped at you.” Twilight smiled, weakly.

From inside the school, the morning bell rung, signaling the start of another day. Twilight let out a relieved sigh as she heard it, and forced her smile wider. “Oh hey look at that time to get to class so we can concentrate on learning new things so we can grow into better and wiser people so bye!” And with that, Twilight took off at an awkward bolt.

Once she'd gotten to the refuge of the classroom, Twilight slumped into her desk with a sigh. She took off her glasses and rubbed at her eyes. School was something she could focus on, to keep herself from getting ... distracted again. Twilight took up her seat in the front row, pulling out pen and notebook as she readied herself for a productive day of learning and mental enrichment. The other seniors filed into their seats behind her, though with considerably less enthusiasm (as one would expect from a bunch of 18 year olds).

“Class.” Principal Celestia practically glided into the room, and the low key roughhousing and gossip immediately ceased. Principal Celestia smiled, and raised one placating hand. “Don't worry, you're not in trouble. It's just that Mr. Neigh wasn't feeling well this morning, so I'm substituting for him today. We'll just make this a review session. Everyone please open your books to page two thirty seven ... “

As Principal Celestia started her biology lesson, Twilight's mind began to wander. Back at Crystal Prep, they'd already covered most of what the principal was lecturing about. And so, Twilight's thoughts turned towards something more ... pressing. She twirled a pen in her fingers and then began to jot her thoughts down in her notebook, brainstorming.

Problem: Strange, sexy tactile hallucinations.

Source? -> Drugs? Possible, but not probable. When was I dosed? With what? Such a heavy hallucinogen would most likely incapacitate me.

Sleep? -> Also possible, as sleep deprivation has been known to cause hallucinations. Though that is usually over a matter of days, not hours ...

Dream? -> It's entirely possible I am in some kind of sexy, recursive dream-- though an unusually lucid one.

Twilight closed her eyes, and tightened her grip around her pen as she came around to the most likely (but hardly simplest) explanation.

Magic?

“Miss Sparkle, care to answer the question?” Principal Celestia's voice snapped Twilight from her reverie. Twilight blinked and tightened her fingers around her pen. She looked up with a forced smile, only to feel the facade melt away in an instant at what she saw.

“Boobs.” Twilight blurted.

Principal Celestia was gone. In her place was none other than Princess Celestia: tall, winged ... and completely nude, save for a smattering of golden jewelry more suited for the cover of a cheap fantasy paperback than a high school. The rest of Princess Celestia's goddesslike form was on mouth-watering display: Twilight bit at her lower lip as her eyes traveled from the regal woman's surprisingly sturdy hooves, all the way past her long, shapely legs, and finally (after a brief pause on Celestia's more than ample bosom) to Princess Celestia's face. Despite the pony morphology, the bemused but caring expression on Celestia's muzzle was quite familiar.

“That's one way to put it, though I didn't expect you to use the vernacular.” Princess Celestia said. She proceeded to reach to her own tits and lift them up a little, though it was a slightly awkward gesture, given their size. She flared her wings out slightly for balance, and Twilight bit at the inside of her cheek. Princess Celestia continued her lecture with practiced ease. “For some ponies, breasts, particularly the nipples, are very sensitive.” The principal-turned-pony-princess let her hands linger a little longer on her chest, and then slid them back down her white-coated sides. “Now, what are some other erogenous zones?”

By reflex, a voice at the back of Twilight's head began compiling a list of anatomical terms (while simultaneously wondering how they might interact with equine anatomy). Twilight managed to rein in her academic enthusiasm (for once) and instead focused on figuring out just what the hell was going on. She slumped back in her chair, only to squeak softly in surprise as she jammed her right wing at an awkward angle.

Wings?

Bit by bit, Twilight became more aware of her body, and the situation around her. She closed her eyes, focusing on individual sensations: the soft scrape of her hooves against the tiled floor. The breeze of the air conditioner through her wing-feathers. The swishing of her tail against the legs of her chair.

The feel of her bare bottom against the plastic of the seat.

With a blush and a shudder, Twilight finally registered (or at least admitted to herself) that she was stark naked. A surreptitious glance from the corner of her eye noted that her classmates (at least the other ones she could see) were in the same state: ponified and pantsless. And yet, the sight remained somewhat familiar, as the other students went through the same routines the usually did in class. Two girls murmured and gossiped to each other, even though one of them now had a horn. One guy slumped back in his chair, eyes closed, just shy of snoring. The pony next to him had one hand under his desk, moving up and down in a rhythmic--

Oh.

Twilight blushed deeper, and looked back to the front of the classroom-- where Principal/Princess Celestia stood leafing through a textbook, which somehow (to Twilight, at least) made her curvaceous form even more enticing. Twilight squirmed in her seat, becoming acutely more and more aware of her half-pony/half-human form by the moment, as an inevitable warmth was stoked between her thighs.

“Principal Celestia!” Twilight shot a hand up into the air. “I mean, uh, Princess Celestia?” she added on without waiting to be called on. “I, uh ... I'm not feeling so well. Can I be excused?”

The elegant, ivory-coated goddess arched a brow, and set her book down. “I hope the subject of the review lecture hasn't distracted you, has it?” Celestia had an ever so subtle tone of invitation in her voice. The Principal/Princess (Princessipal?) bent at the waist, ever so slightly, which had an ever-so-interesting effect on her anatomy.

“What? Distracted? Me? No, no. Uh, anatomy and nerve responses are entirely valid fields of study! It's just that, I ... uh ... must have eaten something that didn't agree with me for breakfast. Can I go to the nurse? Please?”

Princessipal Celestia arched one brow, and then finally nodded. “Of course you can, Twilight.” And she made an airy gesture towards the door. “You don't need help making it to Nurse Redheart's office, do you?”

“I can find it, thanks. Sorry to interrupt!” Twilight scooped up her backpack and clutched it to her chest, trying not to think too hard about the two dozen other students in the classroom watching her go. She bustled out of the classroom and shut the door behind her, then slumped against the lockers outside in relief.

“Okay, don't panic.” Twilight murmured to herself. “You've been through this before. Just because one society has hangups about clothes and sexuality doesn't mean all societies do.” In a moment of weakness, Twilight allowed herself to peek through the window to the classroom. Princessipal Celestia had sat down on the desk, and spread her long legs wide, delivering a gynecology lecture with apparently first-hand demonstration.

Twilight ducked out of sight again, and shook her head. “But it doesn't make any sense.” She rubbed at her face, partly to keep her hands from anyplace lower on her body. “That was a whole society, with magic princesses and castles and stuff.This one ... isn't. And it's just flicking back and forth for no reason. Something's ... something's wrong, here.” She sighed, closing her eyes for a moment. “I just need to get more data. Then I can start putting together a hypothesis.”

With this renewed purpose (if not the best idea of how to go about doing it), Twilight nodded to herself, pushing away from the bank of lockers-- only to get the corner of her blouse's sleeve stuck on a hinge.

“Wait, what?” Twilight said, not even registering the sound of tearing fabric. She looked down, marveling at the sudden sight of lavender cotton. A quick look downward verified the presence of her skirt, stockings, shoes-- feet. Not hooves.

A quick (if awkward) bit of flailing later, Twilight verified the lack of a horn, tail, or wings as well. In an instant, she'd turned back to her normal, fully human, fully dressed self. Twilight peeked back into the classroom, verifying that Principal Celestia and the rest of her classmates had done the same. Even the lecture had changed, as Principal Celestia gestured to a picture of a brain, and not more ... distracting subjects.

Twilight tried (and failed) not to be disappointed by that development.

“Or ... maybe I am going crazy.” Twilight murmured to herself.

She headed for Nurse Redheart's office.

Chapter 2

By the time Twilight made it across teh school, she was a pony again.

It was a subtle thing-- one moment, her leather flats were scuffing over the tile floor, and the next, the sound was replaced by the clop of hooved feet. She paused as soon as she realized what had happened-- and then took a few steps backward. She backtracked all the way to a corner, where she knew she'd been a normal human mere moments before, only to find herself still ponified, still naked.

“Okay, so ... it's not a geographic occurrence.” Twilight murmured to herself, making a mental note. “Which implies this could be a complete planar shift, rather than a localized magic effect. Because every time I've been a pony, everyone else were also ponies, and vice versa for humans.”

Twilight mulled the data over-- and, just to prove her hypothesis, she peeked through a narrow window on a classroom door. Sure enough, there was Mr. Hoofington, now with a muzzle and pegasus wings, keeping a watchful eye on a room full of equally equine students. She even picked out Pinkie Pie's proud pouf of hair at the back of the room. They were all sitting down, thankfully, in the process of taking a test, so Twilight was spared the sight of anything too scandalous. That is, until Pinkie Pie glaced up, her blue eyes meeting Twilight's through the window. Pinkie's wide, infectious smile was unmistakable, even on a short little muzzle. Pinkie sat up straighter and waved eagerly-- which in turn caused her ample chest to jiggle a bit.

“A-hem.” Mr. Hoofington scolded Pinkie, and the pink haired girl went back to her test. Twilight ducked out of sight before the teacher could spot her.

“That was too close.” Twilight said, heart racing. After all, if she were caught peeping in on a classroom, who knows what would happen? No, she needed a safer, quieter place to gather data and compile her thoughts. She snapped her fingers as she realized just where she needed to go: the student lounge! It was just a spare room with a couple of couches and bookshelves, sure, but nobody (nopony?) would ask too many questions about another student hanging out there.

Unfortunately, Twilight soon found she wasn't the only one with that idea.

Two boys (colts?) sat side by side on a couch in the student lounge. Despite their equine features, she recognized the pair from their accessories and hairstyles. There was the taller one, with his dreadlocked hair and Rastafarian hat-- Sandalwood? The smaller one Twilight recognized from his glasses: Micro Chips, president of Canterlot High's AV club (though he now had a blunt horn poking up from his forehead). Apart from their characteristic accessories, the both of them were nude, and happy to show off, by the look of it. The two made an unlikely pair, and yet, they were utterly inseparable, even if they'd been turned to anthropomorphic pony people.

Especially since they'd been turned into anthropomorphic pony people.

Sandalwood put one arm around Micro's shoulders, pulling the bookish young man closer to his broad, bare chest. Micro didn't protest-- in fact, he welcomed the touch. He leaned up to give Sandalwood a little kiss on the cheek, and then slid his hand down his belly, hands going to take hold of Sandalwood's--

“Oh.” Twilight bit her lower lip and flattened herself against the wall beside the student lounge's door. 'Best Friends,' indeed. Soon, a series of soft but rhythmic sighs and grunts began to issue forth from the student lounge. Twilight squirmed, bare back and wings rubbing slightly against the cool metal of a wall-mounted locker. She knew she couldn't look, that she should respect Micro Chips and Sandalwood's privacy ... even if they weren't making any effort to keep things private, apparently. But still, even the playfully passionate sounds coming from the student lounge were enough to get Twilight's vivid imagination to paint lurid, debauched images that made her whole body burn.

Somewhere along the line, Twilight's hands went to her belly, only to start sliding downward--

“There you are.”

Had Twilight been wearing shoes (or much of anything else), the unexpected voice would have scared her out of them. She immediately clasped her hands together for some mild semblance of propriety, then turned to the source of the voice.

“Principal Celestia told me you weren't feeling well.” Nurse Redheart said. She, too, had been ponified like the rest of the school: her pale complexion and neatly tied pink bun were the same, but her practical and shapeless scrubs were gone. Thusly bared, Nurse Redheart was revealed to be a woman in the prime of her life: not as voluptuous as Principal Celestia, nor as toned as Applejack or Rainbow Dash, but a happy medium between. Twilight's eye, in particular, went to Redheart's thick nipples, the coral-pink areolas blending in with the pristine white of her coat. Twilight shook her head, and looked back up to the nurse's face-- somehow, the little white hat Redheart wore looked all the more scandalous, given it was the entirety of her attire.

“Uh. Yeah.” Twilight blurted. “I ... guess I'm just feeling a little lightheaded, and forgot where I'm going?”

“Hm.” Nurse Redheart furrowed her brow. “It's worse than I thought, then. Can you make it to my office?”

“I can do that.” Twilight nodded.

“Good. Follow me.” Nurse Redheart turned on one hoof and started down the hallway, her long tail swaying back and forth over her round, tight derriere. Twilight scolded herself for ogling a school employee-- and then, in a moment of weakness, she peeked back into the student lounge. Micro Chips straddled Sandalwood's lap, facing him, so all Twilight could see was the curve of his bare back and shoulders, along with the hiking of his tail. But by the way they moved, it was obvious they were--

“Ahem.” Nurse Redheart said.

“Coming!” Twilight blurted, stumbling over her own hooves to catch up. “I'm coming! Or! Uh! I mean, I'm ... following you, not that I'm ... you know.”

Nurse Redheart arched a brow, and then wordlessly led on. It wasn't long before she stepped into the nurse's office, with its padded examination table, cabinets full of medical supplies, and vaguely antiseptic smell. Nurse Redheart patted the table, and Twilight obediently sat down on it, crinkling the paper under her bare bottom.

“Tell me how you're feeling, Twilight.” Nurse Redheart said, voice just on the line between sympathetic and businesslike.

“I, um ... I guess I'm feeling a bit distracted, I guess?” Twilight looked down at her hooved feet for a moment. “Like, it's ... it's hard to focus. Really hard.”

“I see.” Nurse Redheart said. The snap of latex gloves made Twilight look up-- Redheart had donned a set of blue examination gloves. Somehow, Twilight found some small degree of satisfaction in seeing that, no matter how crazy things had gotten, at least some people were following basic medical hygiene.

The examination, too, was quite, quite normal. If Twilight closed her eyes, it was just another physical (albeit one without a paper gown). She tried not to squirm from the cold press of the stethoscope to her chest, or wince at the bitter taste of the tongue depressor in her mouth. Then again, the part where Nurse Redheart examined Twilight's wings came as a somewhat novel (and not entirely unpleasant) sensation. Twilight squirmed, wings flaring out a bit, and Nurse Redheart just made a 'hm' noise, and noted something on her clipboard.

“Okay Twilight,” the nurse said, “we're going to take your temperature.”

Twilight nodded, and opened her mouth obligingly.

Nurse Redheart just arched a brow, and then cleared her throat. “We're going to need the most accurate figures we can get, Twilight. You know that.”

“The most accurate?” It took Twilight a moment to figure out what Nurse Redheart meant-- though once she did, her cheeks went scarlet red, and a fresh thrill coursed through her body. “Do you mean--”

“Anally, yes.” Nurse Redheart opened a drawer and took out a long, thin thermometer. “You can lay on your side, or bend over the edge of the examination table, whichever's more comfortable for you.”

“Oh. Um. Okay. If ... you think it'll help.” Twilight murmured, and then positioned herself as directed, settling her hooved feet on the tiled floor as she leaned over. Twilight bit back a moan when her swelling nipples brushed the rough paper of the table.

“Hike your tail up, please.”

Twilight obliged, almost instinctively. She'd almost gotten used to the prospect of roaming around nude-- but then and there, she was even more exposed than before. The cool air of the nurses' office washed over Twilight's most intimate parts-- though what made her shiver was the realization that Nurse Redheart could see everything.

And, at that moment, Twilight wanted her to.

She laid there for a long, long moment, clutching the edge of the examination table. The heat between her legs was almost unbearable as she waited, offering herself to Nurse Redheart, to anyone who might walk by.

Frustratingly, maddeningly, Nurse Redheart didn't take Twilight up on her instinctive offer. Instead, she was all medical professionalism as she slid the thin, lubed thermometer into Twilight's ass.

Twilight gasped at the feeling: cold, strange ... but not entirely unpleasant. She managed not to grind herself back against the thermometer, but just barely. It didn't take long, however, as Nurse Redheart soon pulled it out of Twilight and held it up to the light to take a reading.

“Hm. Just what I thought.”

“It is?” Twilight Sparkle looked over her shoulder, still bent over.

“Honestly, I'm surprised you didn't notice yourself. Slightly elevated temperature, heightened nervous response, rising energy levels ... tell me, Twilight, when's the last time you had an orgasm?”

“Uh.” Twilight's cheeks burned hotter, and she bit at her lower lip. “This morning?”

“What time?”

“Early? Like ... I dunno, five-thirty ish?”

“Five thirty?” Nurse Redheart said, and looked to the clock. “I'm surprised you can even talk at this point. You should know how important proper sexual exercise is to your health, now that you're Eighteen. Everypony's a little different, but you should try to reach climax at least once every few hours, just to let out all that sexual energy. Think of it as a ... safety valve, of sorts, to keep your body from overloading itself.”

“I ... must have forgot?” Twilight offered. “I've been really busy lately.”

“Well, you're not forgetting now.” Nurse Redheart said, stern. “The good news is, after a proper orgasm or two, you'll be right as rain.”

“Oh.” Twilight shivered, and hiked her tail up higher. “Are ... are you going to--”

“If you like.” Nurse Redheart said. Her eyes fixated on Twilight's offered derriere with something more than professional interest.

“I ... I'd like that.” Twilight said. The heat in her cheeks paled in comparison to that between her legs, and she found herself sliding her hooved feet a little wider.

“Turn around and lay back on the table.” Nurse Redheart said. Twilight obliged, the simple, gentle direction making her heart beat faster. Facing Nurse Redheart was a delight in and of itself, as it allowed Twilight to look upon Nurse Redheart's beautiful body. Twilight bit her lower lip, wondering just what it would feel like to run fingers along that pristine white coat, or to close her lips around one of those pink nipples.

“Hold still.” Nurse Redheart said, placing a firm hand between Twilight's breasts, easing her to her back. Her other hand, still wrapped in blue latex, ran up the inside of Twilight's thigh, earning a helpless moan from her.

Twilight opened her mouth to say something, anything-- only to have her words trail off into a giddy “Oh!” once two of Nurse Redheart's fingers pushed into her. Relief washed over her entire body at the sexual contact-- though it soon kindled into further lust still.

Nurse Redheart was ready, however-- as she wasted little time in curling her fingers at just the right angle, seeking out Twilight's most sensative parts. Twilight bucked at the jolt of pleasure-- and then kept on working her hips upwards as Nurse Redheart got to 'work,' methodically flexing her wrist and fingers, building up both force and speed as she went on. Each push of those fingers made lewd, wet sounds-- which were often drowned out by Twilight's lewder-still moaning.

Even if Twilight hadn't grown progressively hornier and hornier over the course of the morning, she wouldn't have lasted long beneath Nurse Redheart's professional touch. All it took was a graze of the nurse's thumb over Twilight's clit to set her off, an electric thrill coursing through her body. Twilight gasped for breath as her body writhed in pleasure-- Nurse Redheart was forced to lunge forward and grab Twilight to keep her from rolling off the narrow examination table.

Twilight moaned again at the feel of warm, soft flesh against hers-- she instinctively leaned up, pressing her lips against Nurse Redheart's. Kissing with an equine muzzle was just as strange as she'd remembered-- but even more enjoyable. She pushed her tongue awkwardly into Nurse Redheart's mouth-- only to have the nurse once again place a firm hand on Twilight's chest as she pulled away.
Nurse Redheart laughed a little bit, and took a step back. “Feeling better?”

“I ... uh ... “ Twilight blinked a few times, staring up at the ceiling tiles. She took a mindful moment to be aware of her (naked, winged, and half-equine) body ... and came to a realization. “Actually ... yes. I mean, that was nice. That was great.” She sat up, stretching her wings out. “I guess I'm feeling a little, uh, clear-headed, now? Not that I wouldn't mind, um ... reciprocating.” Twilight unconsciously licked her lips as she sized up Nurse Redheart.

“I hate to disappoint, but I'm afraid that will have to do for now.” Nurse Redheart said, even as she panted slightly, regaining her breath after the kiss. “After all, if I ... fully indulged myself with every student who came in with raging hormone levels, I'd never get anything else done.”

“Oh.” Twilight's wings and shoulders both drooped.

“But, if you're still feeling ... distracted after school, I'll be more than happy to assist. Though to be honest, I don't think you'll need it. I've seen how close you and your friends are.”

“Oh. Uh. Right.” Twilight said.

“Get yourself cleaned up, and you're good for your next class. Just make sure you have at least one orgasm after lunch, okay?” Nurse Redheart handed Twilight a towel, and peeled out of her blue examination gloves.

“At least one.” Twilight repeated. She managed to clean herself up with a minimum of awkwardness, hoping to get herself from 'lewd' to just 'tastefully nude.' “Got it.”

With that, Twilight bent over to pick up her backpack-- only to jump at a sudden, almost deafening clap of flesh on flesh, followed by a not-unpleasant stinging in her freshly-smacked rump.

“Sorry, couldn't help myself.” Nurse Redheart said. “Now get going, before I can't help myself more.”

“Honestly, I really wouldn't mind if--”

SPANK!

“I'm going, I'm going!” Twilight squeaked, and stumbled out into the hallway. The door closed behind Twilight with a heavy, final sound. Twilight rubbed at her stinging cheek-- and, again, too curious for her own good, she peeked through the window for one last look at Nurse Redheart--

--only to see the nurse brushing a bit of lint from her dress.

Twilight blinked and shook her head, just to make sure. But yes, there was Nurse Redheart, completely dressed, completely human, completely normal. Twilight looked back down at herself once again, verifying the same. Hooves gone, shoes (along with the rest of her outfit) back.

Twilight groaned, though in regular frustration as opposed to the sexual kind. She took off her glasses and rubbed at the bridge of her nose, trying to make some sense of just what the heck was going on. There were just too many variables to keep track of, too many unknowns to question. But, even still, Twilight could at least make two preliminary conclusions.

She'd have to make the 'switch' to the sexy pony people version of reality at least one more time if she was going to figure things out.

And she was looking forward to it.

Chapter 3

“You okay, Twilight?”

“Gah! Pinkie!” Twilight Sparkle jumped at the unexpected appearance of her pink-haired friend. She hadn't had any 'episodes' since her visit to the nurse's office-- and found herself somewhat disappointed by the fact. And so, she made her way through the rest of the day, pretending everything was absolutely normal. When classes let out, she gravitated to her friends' usual hangout spot in one of the musical practice rooms. The chairs and music stands were all neatly put away in one corner, leaving the vaguely ampitheatre-like room empty. That is, except for Twilight.

She pored over her hastily-written notes, searching for some stray observation that could explain just what the heck was going on. She'd made it there early, so she was left to her own devices-- that is, until Pinkie materialized.

Twilight forced a smile, looking up into Pinkie's blue, guileless eyes. “Sorry, you scared me.”

“Don't say sorry! -I- should say sorry! I didn't mean to scare you! Even if it can be kind of fun to get scared sometimes but it's not October and I left my chainsaw at home so any scary stuff is just an accident. I just wanted to make sure you're okay! You've been really quiet all day, and then I heard you had to go to Nurse Redheart's office--”

“Wait.” Twilight said. “You heard I went to Nurse Redheart's office?”

“Well, yeah. Fluttershy told me. That's where you were going when I saw you peeking into Mr. Hoofington's class, right?”

“Hold on, you saw me?”

“Well, duh. Didn't you see me wave?”

“Pinkie.” Twilight said, leaning forward. “This is very, very important. What did I look like when you saw me through the window?”

“What do you mean? You looked like you.”

“Just ... tell me Pinkie. You can remember, can't you?”

“Of course I can! You had purple hair and those neat glasses and your cute little shirt there and--”

“So I ... didn't look like a pony?”

“Nope! I mean, if you'd done that thing where you grow cute little ears and wings and stuff I think I would've noticed all the glowing.”

“It's ... it's not that kind of magic thing, Pinkie.” Twilight shook her head. “Or ... maybe it is? I'm not sure. You wouldn't believe me if I told you.”

“Of course I would!” Pinkie Pie sat down beside Twilight, draping an arm around her shoulder. “You're one of my best friends! And if you're in trouble, I'm gonna do everything I can to help! So just tell me what's going on, and we'll figure a way out of it.”

Twilight looked up to Pinkie's blue, concerned eyes-- and she couldn't help but smile. “Okay, but ... this just stays between us for now, okay? It's ... it's a little embarrassing.”

“Pinkie promise.” Pinkie Pie said gravely, and brought a hand up to hook her little finger around Twilight's. “I won't tell anybody. Ever.”

“In that case ... “ Twilight looked down at her shoes with a blush, and recounted her extradimensional adventures-- first in the seperate equine-humanoid reality she'd visited all that time ago, and then the strange 'flashes' she'd been having throughout the day. She went over to the chalkboard and started sketching out diagrams, though perhaps more for her own benefit than for Pinkie's.

“So let me get this straight-- you're randomly going into a world where everyone you know is a sexy pony person who doesn't wear pants?”

“Er, yes.” Twilight admitted with a blush.

“That sounds awesome!” Pinkie Pie bounced in place. “Can I go? Can I? Huh? Huh? Huh? It'll be like streaking times a million!” She grabbed the bottom of her t-shirt and began to lift it, showing off a swath of softly pudged belly.

“Pinkie!” Twilight said, grabbing her friend's hands before she could get any further. “That's ... not how it works. We don't know what's going on here, and playing around with it could be dangerous.”

“Aw. Okay.” Pinkie Pie said with a little pout.

“It justdoesn't make any sense.” Twilight shook her head in frustration. “I mean, at least the one dimension seemed to function as its own complete society, just without, uh, pants. But this is just overlaying the pony people dimension with ours, like a nude mod for a video game. Not, uh, that I'd download anything like that.” Twilight added on, perhaps too quickly. She shook her head, and went on.

“Additionally, during my previous encounter, I was physically transported to the other dimension-- there was another me there, there was another you there, and so on. I don't think that's what's happening this time around.” Twilight tapped at her chin. “Especially if you remember seeing me outside of Mr. Hoofington's classroom-- as a human. Which implies some kind of parallelism. Maybe. Gah! There's just too much to keep track of.”

“Too bad they don't have like a magic section in the library where you can look this stuff up.”

“You're right, Pinkie. It's not like we can just--” Twilight trailed, off, chalk tumbling from her fingers. “--or maybe we can. Pinkie, you're brilliant!”

“Aw, thanks!” Pinkie Pie said, and then canted her head to the side with a little bobble of her hair. “What did I do?”

“While our library might not have anything about magic ... their library just might!”

“Whose library? Crystal Prep?”

“No, not them.” Twilight shook her head. “The pony-people library! There has to be changes to things other than the people. After all, Principal Celestia had a ... different curriculum than we do here.” Twilight blushed as the memory of Pony-Celestia's goddess-perfect body came to mind. She shook her head, and continued. “It stands to reason that they might have books about dimensional magic, or maybe even an expert we could talk to!”

“So all you have to do is flick the pony-switch and go to the library!” Pinkie Pie said.

“Exactly! Only, I ... uh ... I don't know how to do that. Things just sort of ... happen. That's kind of the problem. I haven't been able to pinpoint the impetus that switches me from one reality to the other. Unless ... “ Twilight bit at her lower lip.

“Unless what?” Pinkie Pie said.

“It ... could be linked to my personal arousal? Given the overtly sexual nature of things, that ... could be it.” Twilight fiddled with her hands, then sank down to sit on one of the 'steps' of the practice room floor.

“So you're saying you go to another dimension when you're really horny?”

“It's ... possible.” Twilight admitted. “But there could be any number of other fact—mmf!”

Twilight's conjecture was cut short as Pinkie Pie took hold of her shirt and pulled her in for a lengthy kiss. Twilight braced her hands on Pinkie's shoulders and pushed her away-- if gently.

“Pinkie!” Twilight gasped. “That's ... not exactly what I had in mind.”

“It's not?” Pinkie Pie's enthusiasm deflated, and the corners of her eyes immediately welled up with tears. “Oh, oh, I'm so sorry! I was just trying to help, and now I've made things worse, haven't I? You're going to hate me forever, aren't you?”

“What? No!” Twilight said. “You just ... surprised me, that's all. I mean. It's just ... you don't have to do anything you don't want to. Even if it's for science.”

“Trust me, Twilight. I want to.” Pinkie Pie winked saucily at Twilight. “I mean, you're super-duper cute, y'know that? I think it's the glasses.”

“Thanks?” Twilight reached up to adjust said glasses, and then allowed herself to really look at Pinkie Pie. She was all smiles and curves-- possibly verging on 'chubby,' but in an inviting, cuddly way. Especially since Pinkie had squeezed herself into a v-necked T-shirt that clung quite tightly to her more than ample chest. Twilight's lips parted for a moment, and she looked up from that tempting valley of decolletage. “I ... I didn't know you felt that way.”

“Well, I do!” Pinkie Pie said. “So, wanna make out some more?”

“Um. Sure. It's ... for science, after all.”

“Mostly for science.” Pinkie Pie scooted close enough for Twilight to smell the sugary-sweet air of baked goods hanging around her.

“Mostly.” Twilight said, and reached over to entwine her fingers with Pinkie's. The nerdy girl (turned dimensional traveler) closed her eyes, giving herself over to the soft feel of her friend's lips. Pinkie giggled through the kiss, opening her mouth slightly, inviting Twilight to explore further. Twilight's pulse beat faster and faster, and she leaned forward, growing hungrier by the moment. She reached up to steady herself on Pinkie's shoulder, and marveled at the feel of her soft, short coat--

Wait.

Twilight broke off the kiss, opened her eyes, and leaned back. Sure enough, there was Pinkie-- only with the addition of pony features and the subtraction of anything resembling proper attire. Or any attire, for that matter. Stark naked, Pinkie's body was a study in softness-- particularly in her heavy pink tits, which in turn peaked in thick, dark nipples.

Twilight ran a hand over her face, verifying that she too had picked up a horn and a muzzle-- and then broke out into a giddy laugh. “We did it!”

“Uh. Twilight?” Pinkie Pie tilted her head to the side. “That was just first base.”

“But we're not playing-- oh, right, sports based metaphor for sexual activity.” Twilight furrowed her brow. “Which implies we may be dealing with some sort of cultural parity—”

“What're you talking about?” Pinkie Pie said. “I mean, sometimes I have no idea what you're talking about and that's fine but usually it's not right in the middle of fooling around, you know?”

“I-- oh!” Twilight blushed, realizing just how close Pinkie Pie was. “Sorry? It's just that ... um. Do you remember what we were talking about just now?”

“Making out? For science?”

“Before that.”

“Those weird dreams you've been having where you get stuck in a world where everyone's all boring and overdressed and they don't have tails?”

“Huh.” Twilight rubbed at her chin. “That's ... really interesting, actually.”

“More interesting than me?” Pinkie Pie adopted a mock-pout, and then draped her arms around Twilight's shoulders. She pulled the other girl to her, her ample chest pillowing against Twilight's own tits.

“Um.” Twilight said, finding herself nose to nose with her friend. “It's a different ... kind of interesting?”

“Kay! Just checking!” Pinkie Pie said, and licked Twilight's nose.

“Hey!” Twilight broke down into giggles, reaching up to cover the end of her muzzle. She leaned back a bit, all the better to look over Pinkie's voluptuous body, kneeling there on the tiered floor of the practice room.

Twilight reached up to squeeze one of Pinkie's tits, her hand drawn there as if by gravitational pull. (Pinkie was arguably busty enough for that last part). The breast was warm and soft in her hand-- Pinkie just laughed, arcing her back slightly to offer herself to Twilight's exploration.

Twilight bowed her head, putting her lips to Pinkie's thick nipple. She sucked, lightly, eliciting a shiver and pleasured squeak from her friend.

“Oh. That's niiiice.” Pinkie said, reaching up to pet at Twilight's hair.

Only encouraged, Twilight suckled harder on Pinkie's breast, feeling her friend's nipple stiffen between her lips. She didn't linger long, soon drawing off one nipple to tease and toy with the other-- for symmetry's sake, of course.

Pressed so close to Pinkie's soft body, Twilight breathed in her friend's intoxicating, sugary-sweet scent with each breath. Eager, too-eager to sample all of what Pinkie had to offer, she soon eased her friend onto her back and started kissing her way over Pinkie's chubby belly.

“That tickles!” Pinkie squealed in approval as Twilight curled her tongue through Pinkie's navel. Giggles soon turned to moans as Twilight moved lower and lower still. Without being asked, Pinkie spread her legs as far as she could manage, offering her sweet pussy to Twilight's lips.

Twilight shifted position a little, briefly running her fingers through Pinkie's unruly pouf of pink hair before she parted Pinkie's already-swollen folds, revealing even brighter pink flesh beneath. Twilight marveled at the sight, then, after briefly considering a career in gynecology, she dragged her tongue up the length of Pinkie's pussy.

Twilight felt the lick was clumsy-- but it made Pinkie Pie shudder with pleasure anyway. Encouraged, Twilight scooted forward, lashing her tongue up and down Pinkie Pie's pussy. Surprisingly, Pinkie didn't taste like a cherry pie-- Twilight found the musky, tangy feel on her tongue ultimately indescribable.

But she knew she liked it.

Vaguely remembering what Nurse Redheart had done mere hours before, Twilight worked her way to the top of Pinkie's sex, slender fingers searching for Pinkie's clit. It wasn't hard to find-- the nub of sensitive flesh was already thick from all the earlier fooling around. Twilight braced herself with a deep breath, and then closed her lips around Pinkie's clit, suckling upon it just as she'd sucked on her nipple.

Under such attention, Pinkie didn't last long. She broke out into delighted, lusty laughter as her body trembled in pleasure. Pinkie's pussy clenched, as did her thighs. Twilight barely wiggled her way out from between Pinkie's chubby legs as her friend writhed and bucked. Finally, Pinkie Pie slumped to the floor, boneless and panting.

“That was fun!” Pinkie Pie declared with a giggle. She idly reached up to toy with one of her own breasts, and then propped herself up on an elbow to look at Twilight. “It almost felt like our first time together!”

“Uh ... thanks?” Twilight said. She looked down the length of Pinkie's naked, sated form, and felt a fresh pang of lust wash over her-- mixed with a sense of pride in having made Pinkie come so hard.

“Wanna go again?” Pinkie slid one hand down to her pussy, lewdly toying with the sticky folds there. “Or should we go to the library before it closes?”

“Go to the-- oh! Right. The library. For research.” Twilight forced herself to look away from the gorgeous sight of Pinkie's body. Slowly, Twilight got to her hooves, splaying her wings out a little for balance. “We need to go to the library.” She repeated to herself, trying to ignore the rising heat in her body.

“Kay!” Pinkie Pie bounced to her own hooves, which set her generous curves to jiggling.

“But maybe we could fool around after?” Twilight said before she realized it.

“Yaaaaaay!”

Chapter 4

As Twilight walked through the ponified-people version of Canterlot High, “after school activities” took on a whole new meaning. Through one doorway, she saw the drama club rehearsing some period romance-- albeit with a very “method” approach to the love scenes. A tall, broad-shouldered stallion of a leading man (leading pony?) stood in the center of the stage, script held out in front of him with one hand, while the other rhythmically moved over his--

Twilight looked away.

Through an open window, she could see the track team arrayed out on a practice field. Twilight easily picked Rainbow Dash's unique hair color amongst the other athletes-- athletes who were actually dressed, Twilight realized. Or ... semi-dressed, at least. The girls wore tight sports bras in a nod to practicality-- though nothing obscured them from the waist down. They didn't even need sneakers-- what, with the hoof-feet and all. Rainbow Dash led the track team through some preliminary stretches, and soon over a dozen lean, fitness-honed bodies mirrored her. Showing remarkable flexibility, Rainbow Dash bent over, nearly folding herself in half as she stretched her hands out to grasp one ankle, and then the other. Twilight bit her lower lip, vaguely wondering if the way Rainbow Dash's tail hiked up was an involuntary reaction, or if she was deliberately showing off her--

Twilight looked away.

And then there was Pinkie. Glorious, voluptuous Pinkie. She bounced, from the pouf of her hair to her inviting derriere. There was a song to be written about that. But who had time to sing, when one's mouth could be better put to use by just opening wide and--

Twilight looked away.

A warm flush traveled up from Twilight's upper chest, all the way to the tips of her ears, nearly enough to turn her purple hue into a red one. She walked faster, each clip of her hooves against the tile floor a reminder of just how strange things had gotten. The school's rickety old air conditioner (some things never changed) rumbled to life, and cool air washed over every inch Twilight's nude, exposed form. Somehow, that no one so much as batted an eye made things even worse. Twilight wondered how far she could push it, if she could just give in and touch herself, right there in the middle of the hallway. Or better yet, she could just ask Pinkie to do it for her. Twilight envisioned those lovely blue eyes looking up at her from between her--

“We're here!” Pinkie said.

“Oh!” Twilight shook her head, momentarily dispelling the debauched daydream. “Right! The library! The place we are going for research purposes!”

“Or--.” Pinkie Pie clasped her hands together and leaned forward, the pose offering quite the interesting view of her bared bust. “We could fool around in one of the study cubicles? Might be a little something of a ... tight fit.”

“Guh.” Twilight said, staring down at Pinkie for a few long, glorious moments. “How about, uh ... later?” Twilight ventured. “As ... uh, as ... enticing as that sounds, I ... shouldn't.”

“Why not?”

“Because there's a definite possibility that my own dimensional alignment, for whatever reason, is tied to my personal level of arousal, meaning that if I get too ... satisfied, I'll switch back to my home dimension, and I won't be any closer to figuring out what's going on.”

“So ... what you're saying is that I should just keep teasing you so you stay horny so you stay here?” Pinkie Pie leaned against Twilight's side, her curvy form warm, inviting, and smelling vaguely of sweet pastries.

Twilight licked her lips.

“That ... is a logical course of action.” She admitted, even as one of her fingertips traced around one of Pinkie's thick, suckle-worthy nipples. “But--”

“Butt?” Pinkie turned around, hiked her tail.

Twilight grit her teeth, biting back a lusty whimper. “Not ... not yet, Pinkie.” She said, shivering as she did so. “I ... I just need to do some research, first.” As she spoke the 'r-word,' Twilight finally let her academic desires overcome her physical ones (however briefly). Mind over matter, she told herself. “Why don't you ... why don't you get everyone else together? You know, Rarity, Fluttershy, and the rest? That way, once I have a better idea of what's going on, I can share my findings, and we can decide what to do from there.”

“That's a great idea! That way, we can all do the glowy thing and shoot magic lasers at whatever the problem is!”

“I'm hoping it won't come to that.” Twilight said with a wan smile.

“In that case, we can just have sex instead!” Pinkie Pie clapped her hands, cheery.

Twilight stared. “Wait what.”

“Don't worry, I'll take care of everything.” Pinkie winked conspiratorially to Twilight, then spun around on one hoof to start bouncing down the hallway again, each joyful hop causing her tail (and posterior) to wiggle in opposite directions.

Twilight looked away.

After all, there was research to be done. She walked through the doorway to the library, and took in a deep, bracing breath. The smell of aging paper and dried-out binding glue filled her nostrils with a comforting, familiar air. Oh, sure, everyone in the library was a stark-naked equine-humanoid hybrid ... but at least they were quiet.

And the books were the same.

Soft-hooved, Twilight walked over to a random shelf, reaching out to run her fingertips over the books there, as gentle as she'd be with any lover. No, gentler, as she had no desire to just grab onto a book and ride it until--

“Looking for something, Miss Sparkle?”

Twilight turned. Gasped. As, there, standing before her, was none other than Vice-Principal Luna. Or, well, the pony-person version thereof. She looked more princess than administrator, standing tall and regal, her hair and tail both billowing out in some unseen, unfelt breeze. She wore little, which was more than Twilight could say-- bracers of matte-dark steel protected Luna's wrists and shins, matching the polished gorget at her throat. That, however, was the full extent of her attire-- Luna's toned form reminded Twilight of some sort of warrior queen, a barbarian with no such need for civilized trappings such as 'pants.' Twilight forced herself to look up at Vice-Principal Luna's face-- only to see the wire-framed glasses perched upon her pony-muzzle, which made Twilight's knees go shaky for a completely different reason. Everything about her radiated authority, radiated power-- Twilight couldn't help but dredge up half-remembered quotes from old fantasy novels, as somehow they were the only way to really describe her.

Hither came Luna the Librarian. Starry-haired, sullen-eyed, a scholar,, a reaver, a slayer, with gigantic melancholies and gigantic mirth, to tread the embossed tomes of the reference section under her sandalled hooves ...
“I said--” Vice-Principal Luna's authoritarian voice cut through the quiet of the library (not to mention Twilight's daydreaming). This did not exactly help. “Are you looking for something, Miss Sparkle?”

“Vice-Principal Luna!” Twilight forced a smile, and tried not to picture herself clinging to Vice-Principal Luna's thigh while a thunderstorm raged in the background. “I, uh, didn't know you worked in the library. I'd think you'd be ... you know ... Vice ... Principal-ing.”

“Miss Bookmarque had a prior obligation, so I am supervising the library for the time being.”

“Oh! Well, that's really nice of you.” Twilight resolutely looked up at the Vice-Principal's face, doing her best to ignore the rest of her. “But, uh-- I was just looking for some books on magic, that's all.”

“Magic?” Vice-Principal Luna arched a brow. “I didn't think you'd have an interest in it, Miss Sparkle.”

“Really?” Twilight blinked. “Well, um-- I just like to broaden my horizons, that's all. Always good to learn new things, right?”

“Indeed.” Vice-Principal Luna shrugged her bare shoulders, causing her wings (she had wings!) to mirror the gesture. “I believe the books on magic are over there, at the far end. Bottom shelf.” She pointed to a row of shelves in the non-fiction section.

“Really?” Twilight perked her ears. “Thanks!” Her bibliophilia soon overpowered her other -philias, and Twilight dashed off for the aforementioned bookshelves. She sighed pleasantly as she stepped into the shadow of the stacks, comfortably surrounded by printed text, just waiting to give up its secrets.

Twilight skimmed the titles, searching for something, anything that might help. She hadn't memorized Canterlot High's entire library catalog (yet), but she knew enough to pick out the titles that didn't belong there, archaic-looking tomes haphazardly crammed in between glossier, more modern texts. The Rise and Fall of the Crystal Empire, Exotic Beasts of the Everfree Forest, A Confederacy of Discords, and more. Twilight picked them up as she went along-- they might not be directly about magic, but their sheer, incongruous presence could be a clue in and of itself.

Finally, Twilight made it to the end of the row-- where, sure enough, a book with 'MAGIC' emblazoned on the spine beckoned her on. Twilight crouched down, reached for the book--

“And just what do you think you're doing?”

Blue hooves stepped into Twilight's peripheral vision, and she soon looked up to find herself looking up at a slim young woman with a light blue complexion and a haughty expression on her muzzle. She wore a star-embroidered wizard hat, along with a short cape in matching fashion-- though she kept the cape thrown back over her shoulders, so it did nothing to conceal the shapely body beneath.

“Research?” Twilight tried to ignore how awkward it was to find oneself at eye-level with another girl's pussy, to little avail.

“Bah! The Great and Powerful Trixie can see through your futile deceptions!” The wizard-hatted pony-girl planted her hands upon her hips, and laughed with such gusto that it set her perky, upturned breasts to jiggling.

“Quiet.” Vice-Principal (and temporary Librarian) Luna leaned around the corner, glaring. Trixie shut up, while Twilight began to think detention might not be quite so bad, in perspective.

“A-hem.” Trixie said, if at a lower volume. “If you're trying to show me up, don't even bother. I mastered every illusion in every one of these books before I even had my cutie mark.”

“You-- what?” Twilight said, and picked out a magic-book at random, reading its title: MAGIC AND LEGERDEMAIN TO FOOL YOUR FRIENDS! She paged through the book-- and sure enough, the diagrams were of things to do with cards and coins, rather than how to harness the arcane energies of the universe to circumvent the laws of physics. “Oh.”

“That's right!” Trixie flicked her hand just-so, making a deck of cards materialize from seemingly nowhere. She shuffled the cards, only to fan them out in ascending order (hearts to spades), and then collapsed the deck, making it disappear again.

Twilight blinked, realizing that the magic trick she'd just watched was more difficult given Trixie's lack of sleeves (or much other clothing, for that matter) to hide things in. “That's ... actually pretty impressive.”

“Of course it's impressive! The Great and Powerful Trixie is unparalleled in the realm of the mystic arts! So don't even bother.” Trixie huffed. “Besides, it's not as if you don't have enough on your plate already. What, with the world-saving and all. Hmf.”

“World saving?” Twilight said. “What are you talking about?”

“Oh, don't play modest. Everypony knows what you get up to every couple of months. First you turned Nightmare Moon back into Vice-Principal Luna--”

“I-- but-- that didn't happen!”

“Oh, I suppose the rest of your friends helped too, sure. And then you all got together when Discord busted out of that statue, and then there was the business with Sombra ... and that's just the big stuff. Honestly, Twilight, while some ponies might be more than happy to indulge you by telling you how great you are, the Great and Powerful Trixie honestly has better things to do. So just go ahead and put that book back on the shelf, and go find yourself another villain to vanquish, hm?” Trixie waited until Twilight put the magic book on the shelf (not that it'd do her much good anyway) and turned around with a swishing of cape and tail.

Twilight's eyes lingered on the departing pony-girl's derriere-- only to start blushing harder as she realized she was staring. “Aaaargh!” Twilight dropped her books and rubbed at her face with both hands. “Why does everyone here have to be so hot?”

Twilight made a quick circuit of the library, but had no luck in finding anything to explain just what was going on. If anything, the strange inclusion of older texts on strange subjects just made the whole situation stranger. After about an hour of fruitless searching, she gave up and went outside--

--only to find her friends waiting for her.

If she closed her eyes, Twilight could pretend that it was normal: Pinkie Pie, Applejack, Rarity, Fluttershy, and Rainbow Dash, all lounging around the statue on the school's front lawn, chatting, laughing. But even the tiniest peek would show things to be entirely different-- what, with all five of her friends now bearing equine features, and not a stitch of clothing between them to hide it. Voluptuous Pinkie. Amazonian Applejack. Glamorous Rarity. Sleek Rainbow Dash. Willowy Fluttershy. If anything, looking at all five of them at once was a relief, as Twilight honestly had too much to take in to be caught staring at one body or another.

“There she is!” Pinkie Pie said, and immediately set about bouncing with her usual distracting enthusiasm. “Over here, Twilight! It's us! Your friends!”

“She knows who we are, Pinkie.” Rainbow Dash said.

“You didn't talk to her earlier!” Pinkie Pie said. “I just wanna make sure everything's okay!”

“It's ... fine, Pinkie.” Twilight lied as she stepped closer. “I'm just ... trying to figure some things out, that's all.”

“And that's why you went to the library!” Pinkie Pie beamed. “So, did you find out what's going on?”

“Not ... exactly.” Twilight said. “I didn't find the exact reference material I was looking for, but I did learn a couple of things anyway.”

“Like what?” Applejack said, leaning forward and pushing her hat (her only article of clothing) upward.

“It's ... hard to explain.” Twilight said with a dejected sigh. “Mostly because I'm not entirely sure of what's going on myself. The long and short of it is, I think I might be accidentally traveling between dimensions. Again.”

“Again?” Fluttershy said.

“Like I said, it's complicated. But the difference here is that, for whatever reason, the dimensional shifts are tied to me. Personally. And, um. Intimately.” For the first time, Twilight realized five of her best friends (or at least their equine dopplegangers) were staring at her naked form.

“What's that supposed to mean?” Rainbow Dash said.

“It means that the dimensional shifts tend to happen when I'm ... horny.” Twilight bit at her lower lip.

“That's it?” Rainbow Dash blinked. “Because if it were me, I'd be like switching planets all the time.” She grinned, flaring her wings and spreading her legs to show off, shameless and proud. “Seriously, I'd be on like Mars by now.”

“Please, Rainbow. Can't you see that Twilight is serious?” Rarity scolded. She slid off of her seat, then strutted over to size Twilight up. “Honestly, dear, look at you. Are you alright? You're wound tight as a spring. Dimension magic or no, getting this worked up can't be good for you. When's the last time you came?”

“The last time I ... oh! That was ... uh ... at the nurse's office? Just a ... few hours ago, I guess?”

“That long?” Rarity said, aghast. “Oh, Twilight, you poor thing-- no wonder you're all in a tizzy. Please--” She set a soft, gentle hand upon Twilight's arm, but the fleeting contact was enough to send a red-hot jolt coursing through Twilight's body. “--can we help you, darling?”

“Yes.” Twilight said, desperate, only to clap her hands over her muzzle in horror. “I mean. Uh. You don't have to--”

“But we want to, darling.” Rarity took a step closer, and the sweet, intoxicating smell of her perfume filled Twilight's nose. For a brief moment, Rarity looked over her shoulder at the other four girls. “Isn't that right, ladies?”

The others just smiled and nodded in agreement, moving in closer, surrounding Twilight, albeit in a friendly way.

“Oh.” Twilight bit at her lower lip. “Then, uh. If you guys really want to--”

“We really want to.” Pinkie Pie said with a sly smile.

“--I guess I've learned enough that it's okay if I go back to the other dimension.” Twilight added on.

“Please, Twilight.” Rarity leaned against Twilight's side, nuzzling at her neck, gentle and affectionate. “There's no need for justification.”

“I dunno, Rarity!” Pinkie Pie said, cuddling in against Twilight's other side. “Maybe she has a kink for technobabble? Do you have a kink for technobabble, Twilight?” Pinkie Pie reached out and gently traced a finger over the outside of Twilight's arm. “Because if you do, I'd totally love to reverse your polarity, if you know what I mean.”

“I don't think that'll be nessescary?” Twilight said with a puzzled blink.

“Okie dokie! Normal dirty talk it is, you sexy monster. Rawr.” Pinkie gave Twilight a toothless play-bite on the shoulder, eliciting a throaty moan.

“Mmm, so it's decided, then.” Rarity put a gentle hand to Twilight's chin, turning her head towards her for a gentle kiss. “Now come on, let's find someplace more comfortable. For as fun as ravishing you out here in the open might be, I'd rather not get any grass stains in my coat.”

“Didn't bother ya last time ya came ta visit.” Applejack said with a playful wink.

“Quiet, you.” Rarity narrowed her eyes at the farmpony with a look of equal parts annoyance and adoration.

“C'mon!” Rainbow Dash chimed in. “My house is only a couple blocks from here, and both my parents should be working late, so we'll have the whole place to ourselves!”

The term 'stampede' wasn't entirely accurate, but it was close. The few blocks from the school to Rainbow Dash's house went by in a blur. Her friends laughed and chatted and jostled at each other like any other bunch of eighteen year olds would, but there was always someone on either side of Twilight with an affectionate arm around her waist, or even a hand on her ass. Twilight savored the contact, each little touch and caress kindling a fire in her chest.

Finally, they came to a modest little ranch house-- the front door was unlocked, Twilight noticed –and then the six of them wound up in what could only be Rainbow Dash's bedroom. Rock & roll posters and flyers covered the walls, and a large (and unmade) bed was pushed up into one corner.

“So,” Twilight said, blushing all the while, “where do we-- mmf!”

Her question was cut off as Rarity kissed her, lips and tongue hungrily gliding over her own. Twilight made a muffled, pleasured little sound, and parted her muzzle so Rarity could do as she wished. Almost as an afterthought, Twilight slid her backpack off of her shoulder and tossed it on Rainbow Dash's bed. Rarity slid a slim hand up the inside of Twilight's thigh, fingertips coming to barely graze the warm folds between her legs. Twilight shivered at the touch, then scooted her hooves a little wider to offer easier access.

“Oh, darling-- you're positively soaked.” Rarity broke the kiss, but stood close. She leaned her forehead against Twilight's, causing their horns to touch-- causing a strange but not entirely unpleasant hum to course through Twilight's body. “It's a good thing we've got you here, or else you might have exploded, worked up as you are.”

“That ... doesn't happen, does it? Ponies getting so horny they explode?” Twilight said.

“Let's not find out.” Rarity murmured into Twilight's ear.

“Hey, don't hog her all for yourself!” Rainbow Dash said, slipping around to stand behind Twilight. The lithe athlete ran her hands up the outside of Twilight's legs, up her sides-- and then over her back, to her wings.

“Rainbow?” Twilight blinked. “What are you-- oh.”

“You've got awesome plumage.” Rainbow Dash cooed, running her fingers through Twilight's feathers. The sensation was strange, alien ... and very pleasant. Rainbow Dash certainly knew what she was doing as she leaned in, tracing her lips over Twilight's spine, seeking out the sensitive spot where her wings joined her back.

“Thanks. I think?” Twilight squirmed a little, then relaxed, allowing Rainbow Dash to do whatever she wanted.

Applejack soon sauntered over, and Pinkie Pie followed, both of them licking their lips. Applejack slid downward in front of Twilight, and then leaned forward. The brim of her hat obscured what she was doing-- but soon enough, Twilight felt Applejack lavishing eager attention onto her sodden pussy. Applejack pushed her tongue between Twilight's folds, tracing the tip up and down, pleasuring her. Twilight's knees buckled, and she leaned back against Rainbow Dash and Rarity for support.

Pinkie Pie, meanwhile, got down on hands and knees and scooted around behind Twilight, wedging herself in between Twilight and Rainbow in a slightly awkward (but not entirely unpleasant, given all that warm, soft touch) position. “Double team!” Pinkie Pie said, and before Twilight could correct her (as things had gotten to the 'quadruple-team' point by then), Pinkie grabbed a handful of Twilight's tail with one hand, spread Twilight's cheeks with the other, and nuzzled in beneath her tail.

“Oh!” Twilight squealed, looking back over her shoulder. “Pinkie, you're ... there?”

“Mmmhmm!” Pinkie murmured, and then leaned in further, tracing her tongue in little circles around Twilight's pucker. Twilight gave a breathy, surprised moan-- the contact was different, but not altogether unpleasant-- just another sensation to lose herself in. And lose herself she did, savoring the hot, electric thrill of being the center of attention, pleasured by her friends--

“Um, Twilight?”

“Mmmh?” With no small degree of effort, Twilight forced her eyes open so she could look at Fluttershy. Gorgeous, naked Fluttershy, with her slender build, perky breasts almost (but not quite) concealed by the long curtain of her pink hair. She stood off to the side, wringing her hands together.

“Could you ... um ... do something for me?” Fluttershy said.

Twilight rolled her hips against Applejack's gently pushing tongue, and nodded. “Anything.” She said, and meant it.

“It's nothing too hard.” Fluttershy stepped forward, and gently took Twilight's hand between both of hers. “I just ... it'd just be nice if you could touch me. Here.” And she guided Twilight's hand downwards, over her belly and between her legs.

“Okay?” Twilight said. She turned her palm upward-- and Fluttershy did the rest, guiding two of Twilight's fingers into her pussy. Twilight marveled as her digits slid right into Fluttershy's slick, hot sex-- how horny had she gotten, just by watching? She curled her fingers, and Fluttershy's mouth parted in pleasure. She looked up at Twilight, and sighed again. “More. Please?”

Twilight obliged, and started curling her fingers in little circles within Fluttershy-- though the pink-haired girl did most of the work, holding Twilight's wrist in place as she spread her stance, fucking Twilight's typist-strong fingers.

Between the enthralling sight of Fluttershy riding her hand, and the combined efforts of her other friends, Twilight did not last long. Pent up from a day's worth of sexy spectacle, Twilight finally found her much-needed release. She came, hard and repeatedly, her entire body trembling. Her pussy clenched down on Applejack's lips, while her wings flapped uncontrollably-- which only made Rainbow Dash laugh.

Twilight's muzzle hung open as she let out warm, breathy, wordless gasps-- the waves of pleasure finally died down, and she collapsed against her friends, helpless and weak. One by one, the other girls drew away from Twilight's body (though Rainbow Dash had to drag Fluttershy off of Twilight's hand before it started to cramp) and eased her down onto the bed.

Sticky, sweaty, and satisfied, Twilight stretched out. “That ... “ she panted out once she remembered how to speak. “That was nice.” She shivered a little as an aftershock of pleasure coursed through her body, and then looked up at her friends. “Thank you.”

Her gorgeous, nude, and equine friends.

Wait.

“Hold on.” Twilight sat up, lust-fogged mind clearing. “I just had an orgasm. Several orgasms.”

“Well duh!” Rainbow Dash rolled her eyes. “That's the whole point!”

“But ... according to my earlier observations, I should have switched back to the other dimension by now. But I'm still here.”

“Lucky you!” Pinkie Pie said, and leaned up to kiss Twilight's knee. “Wanna go again?”

“Maybe?” Twilight admitted. “I mean, uh, we could replicate the ... experiment, but I need to catch my breath, first.” She scooted back on the bed, propping herself up with a few pillows. “But before then ... I need to think. I've got to be missing something here. I just wish I had someone to compare notes with--” she blinked, and snapped her fingers. “Of course! I was so distracted all day, I didn't think to call Sunset Shimmer!” She nodded, resolutely, and then grabbed her backpack, rummaging around inside. Textbooks, notebooks, pen, paper, other sundries (including an abacus, strangely enough) ... but no phone. Or even a charger, for that matter.

“Shoot.” Twilight huffed. “I must have dropped it somewhere back at school.” She zipped her backpack shut, and shook her head. “No sense worrying about it now-- can I just borrow one of you guys' phone?”

The five other girls looked down at Twilight with varying levels of confusion.

Rainbow Dash spoke up first.

“Uh. Twilight? What's a phone?”

Chapter 5

Twilight upended her backpack, dumping its contents onto the floor of Rainbow Dash's bedroom. Some of it was familiar, expected: books, pencils, folders full of blank paper, and other school supplies. The rest ... wasn't. Twilight's phone was missing-- as was her charging cable, and even the little phone-sized pocket that was on the inside liner of her backpack. Instead, all she found in its place was an abacus: certainly an interesting piece of technology, but an outdated one, and something she knew for a fact that she hadn't put in her backpack to begin with.

The dildo was new as well.

“Oooooh, neat!” Pinkie Pie grabbed the thick, double-ended toy from where it lewdly bounced on the ground, and twirled it around like the world's lewdest set of nunchucks. “Double ended! Can I give it a try?”

“I ... have no idea how that got in there.”

“So your mom just got you a new toy as a surprise and put it in your backpack? Lucky you!” Pinkie Pie flipped the latex cock around and let it rest between her bountiful breasts.

“Okay, really didn't need that image.” Twilight rubbed at the bridge of her nose. “Nevermind the dildo, it's this I'm worried about.” She held up the abacus.

“You're ... going to do your math homework?” Rainbow Dash canted her head to the side.

“No, I'm not! Or, uh, at least not until I figure this dimensional stuff out. Priorities.” Twilight patted the flat of the abacus against the palm of her hand. “What's weird is that slide rules have been out of date for decades. Between this, and the fact that you guys don't know what a cellphone is ... it's like technology is regressing somehow.”

Twilight scrunched her brow in concentration, and made a quick circuit of the room. “Look-- Rainbow's got electrical light, outlets, a radio ... but no computer, no telephone, no television--” she paused as she stopped in front of a bookshelf jammed up into the corner. Twilight stared at a row of trophies, fixating on one in particular. Instead of a soccer ball or a cup at the top of the trophy-pillar, the trophy had a small brass sculpture of two pony-people figures, one straddling the other-- “Is that a sex trophy?”

“Freestyle erotic aerial acrobatics!” Rainbow Dash took to the air (at least as best she could with the ceiling not too far above her) and flexed, showing off her lithe, bared body with no small degree of pride. “Don't you remember, Twilight? You came!”

“I went?”

“No, you came.” Rainbow Dash winked.

“Oh. Oh.” Twilight's cheeks flushed red. “But, uh-- that's beside the point. Because the important takeaway here is that technology seems to have gotten rewound about a century or so--” she paused again. “Wait, what year is it?”

“It's one-thousand and nine.” Rarity said from where she'd nestled herself into Applejack's lap. “Whysoever do you ask?”

“It's what? One thousand and nine? That doesn't make any sense! We should be barely subsisting on an agricultural economy if we were back in the eleventh century!”

“Why ever would that be so?” Rarity blinked. “The centuries since Principal Celestia came to power have been nothing but a steady march of progress.”

“Wait, centuries? Principal Celestia?” Twilight sputtered.

“Well yeah!” Pinkie Pie said. “Principal Celestia has ruled over Canterlot High ever since her sister turned into Nightmare Moon and then they had a big fight and Vice Principal Nightmare Moon got banished to the moon but then she came back and tried to throw the world into darkness but the lucky thing was the rest of us all found the Elements of Harmony and then we zapped her with the friendship laser so she's back to being Vice-Principal Luna again!”

“That doesn't make any sense! For ... like, a dozen different reasons!” Twilight took her glasses off and rubbed at her face. “It's even worse than I thought-- the two dimensions are colliding even more now, to the point where it's not just the people who are changing, but the entire world around them. Don't you see? Wait-- no, of course you don't. Your memories are being overwritten as well. I must be immune because ... of course! I visited the other dimension that's breaching this one before! Which means any other dimensional travelers might also have retained their memories, which means we need to talk to Sunset Shimmer right now.” Twilight shoved her things into her backpack and slung it over one shoulder.

“Why didn't you say so?” Rainbow Dash glided over to her bedroom window and bent over to fiddle with the latch. Her multi-hued tail hiked upward, flagging attention to her tight, round cheeks. Twilight knew Rainbow wasn't showing off (for once), but she stared anyway, licking her lips as she saw the thin blue lips of her friend's pussy, framed by the spank-worthy globes of her ass.

“If we fly hard, we can get there in like fifteen minutes!”

“I, er ... what?” Twilight brought a hand up to her muzzle, even though she was fairly certain she wasn't drooling. Much. “Did you say fly?”

“Of course! Pinkie and Applejack and Rarity can catch up later-- I could get there even faster on my own, but I'll be nice and let you set the pace. Unless you're too slow.”

“But I can't--”

“Sure you can! That's what you got wings for! C'mon!” And with that, Rainbow grabbed Twilight by the wrist and jumped out the window, tugging her along with her.

Twilight screamed.

For a solid minute.

Eventually, Twilight realized that it shouldn't have taken that long to fall from a second story window. She opened her eyes ... and found herself hovering about a dozen feet off of the ground. Sure enough, as she glanced over her shoulder, her wings were beating rhythmically, instinctively holding her in the air. Behind her, Fluttershy and Rainbow Dash hovered comfortably, almost angelic in appearance.

“I know you're not as strong a flyer as I am, Twilight, but jeez. You're worse than Fluttershy! Uh-- no offense intended.”

“None taken.” Fluttershy murmured.

“I ... uh ... it's ... been a long day.” Twilight looked down to her hooved feet, then past them to the ground below. “But I can deal with it. We just need to get to Sunset Shimmer's apartment.”

“Whatcha hovering around for, then?” Rainbow Dash turned an eager somersault in midair. “Let's go!”

Flying, Twilight found, was surprisingly enjoyable.

Surprisingly easy, too. Once they got going, all she had to do was keep her wings stretched out to glide on the warm air currents-- currents that Rainbow Dash had an instinctive knowledge of, apparently. The wind tickled over every inch of Twilight's bare form, and despite the altitude, a pleasing warmth coursed through Twilight's body. Though she had to admit at least some of that came from the all-too-enticing sight of Rainbow Dash and Fluttershy's posteriors ahead of her, almost like the tempting globes were on display only for her. Twilight soon realized there was a subtle difference between the two butts-- Rainbow's was toned and muscular, while Fluttershy's was rounder, softer. Either way, it was as if they were both just waiting for her to grab ahold of one tail or the other and push her face right inbetween--

--Twilight looked down.

Below, the pony-people of town went about their business. Shopping. Exercising. Working.

Fucking.

On a rooftop below, a blonde girl with a grey coat and feathers straddled some lucky, anonymous male. Her wings bounced with each thrust, as did her modest, pink-capped breasts. Even at her altitude, Twilight could hear the vaguely familiar-looking mare's high-pitched squeaks of pleasure. The blonde blinked as she saw Twilight and her friends pass overhead, then raised one hand to wave, cheery and shameless.

She got fucked so hard she went crosseyed, Twilight thought.

Twilight bit her lower lip and forced herself to pay attention to the other goings-on in town. For one, while the layout of the town's streets and buildings looked similar to what she remembered, although ... different. There were power lines, true-- but not as many of them. What was more notable was the utter lack of automobiles-- instead, people got around using red-roofed streetcars that Twilight had never seen in town before. Though there were also various carts and wagons of different sizes and purposes, each drawn by one or more burly ponies in tack and harnesses that looked more ... recreational than practical.

Twilight flew on.

Trying to stay calm, Twilight focused on the town's changing geography. Towards the south of town, a massive, looming forest that certainly wasn't there before blocked off the main approach to the town. Strange calls and cries echoed out from the deep wood, the calls of strange beasts and birds that Twilight couldn't identify-- and certainly didn't want to. Likewise, there were a few places Twilight could only glimpse at the corner of her eye that looked ... fuzzy. Undefined. The eraser-marks left over from a reality that was re-drawing itself with every passing minute.

Finally, the three of them circled down to the ground in front of the apartment building Sunset Shimmer lived in. That much was at least the same-- it was a humble brick building towards the edge of town, balanced right between 'trendy/bohemian' and 'possible code violations.' A small coffeeshop had sprouted up across the street, pushing the place's definition more towards the former. Twilight wasn't quite sure how the various naked pony people roaming about influenced the equation. Nobody (nopony?) gave them a second glance as they went into the building and climbed a few flights of stairs to Sunset's apartment.

“Sunset?” Twilight rapped on the door. “It's us! Please be home!”

“Twilight?” Sunset's voice was muffled. “I, uh-- I can't come out now. I'm ... sick.”

“Let me guess-- you've got the Pony Flu? Or-- wait, no Pony Pneumonia, that's got a better ring to it.”

“What?” Sunset said.

“Okay, bad joke. But it's been a long day. But could you open the door? Please?” Twilight bit the inside of her cheek. “No pressure and all, but, um, the fate of the universe may be at stake?”

Sunset Shimmer opened the door.

Sure enough, she had been pony-ified, along with the rest of the town. Two expressive ears and a little horn poked out of her luxurious red hair, and her face now had a cute muzzle. Her eyes, though-- those were the same.

Sunset Shimmer had wrapped herself in a bedsheet, tying it around one shoulder in a vaguely classical fashion, leaving the other orange shoulder temptingly bare. While meant for modesty, the fabric was thin, clinging to Sunset's hips and chest when she moved. At seeing her three friends in the hallway, Sunset Shimmer gaped. Blushed.

Watching her, Twilight realized what she must have looked like for most of the day.

“Twilight!” Sunset said. “What's going on? Why are you naked? Why am I naked? I just ... woke up like this this morning. As if having hooves and a horn wasn't bad enough, my closet was just ... gone!”

“It's ... complicated. Can we come in?”

“Uh, sure.” Sunset Shimmer stepped back, allowing her three friends to enter.

“I'm ... kind of surprised you're, um, covering up.” Twilight certainly did not look at the valley of cleavage created by Sunset's makeshift toga. “I mean, aren't you from a dimension where everyone's a pony and doesn't need to, uh, get dressed?”

“That's true. But I've been here a long time. And where I'm from, ponies-- people-- –whatever ... they don't have sex out in the open. I tried going outside this morning, but I nearly tripped over my neighbor going down on the mailman-- mail stallion? And, um ... I haven't ventured outside since. I would've called but ... my phone's gone too.”

Rainbow Dash and Fluttershy walked in after Twilight, and Sunset gaped at them, too. The fact that Rainbow Dash took the opportunity to pose and flex didn't hurt much, either.

“What's going on?” Sunset said.

“That's what I'm trying to figure out.” Twilight said. “I thiiiink it has to do with that one time I accidentally zapped myself into another dimension full of, well, pony people.” She reached up and tapped her own nose, as if to prove her point. “See, back there, everyone was ... like this.”

“Everyone was naked? And half pony?” Sunset said.

“That's oversimplifying it, but yes.” Twilight paced back and forth in the small apartment. “My going theory is that the dimensional rift didn't fully close, and now it's kind of ... relapsing, I guess? The two realities are merging together. That's why everything is so weird and anachronistic. Certain things are getting, uh ... deleted, maybe? Others are getting overwritten. That's why technology has somehow regressed to roughly early nineteenth century standards. More importantly, that's why most everyone is acting ... differently.”

To prove her point, Twilight nodded to where Rainbow Dash and Fluttershy had settled down on the couch. Fluttershy cuddled into the embrace of Rainbow's arms and wings, while Rainbow made no effort of hiding the way her hands intimately, brazenly roamed over Fluttershy's lithe, soft body.

“But!” Twilight turned away, even as she blushed. “My memories haven't changed, since I've actually traveled between dimensions. And since you've come from a different dimension as well, you've stayed the same too.”

“Okay, that follows.” Sunset said, “But, um--”

“What?”

“How come you're not wearing any clothes?”

“Oh. Uh.” Twilight looked down at herself, and bit her lip. The flight out had gotten her pulse racing again, not to mention the thrill of standing there so casually, completely exposed in front of her friend. “When in Rome?” she managed, and shook her head. “But nevermind that-- I'm going to need your help to fix this.”

“How?” Sunset said.

“I'm ... not sure yet. But the good news is, I brought notes?” Twilight unslung her backpack and pulled out her notebooks without revealing the big dildo that was still flopping around at the bottom of her bag. “I'm sure if we work together, we can find a way to change anything back to normal in no time.”

“Hey, uh, question.” Rainbow Dash raised a hand, even as Fluttershy nuzzled in against her neck. “When you say 'normal,' what do you mean? 'cause this is normal.” Rainbow Dash's other hand strayed to one of Fluttershy's perky tits, giving her a squeeze.

“For you, maybe.” Twilight said. “Or, um ... one of you, at least. But back where I'm from, nobody has wings, or horns, or hooves ... and people aren't as, uh ... “ Twilight's cheeks flushed again as she watched Fluttershy squirm. “Friendly?”

“Oh, that sounds terrible.” Fluttershy said, voice even more breathy than usual. She bent her knees, curling more against Rainbow Dash. “Why would you want to make people meaner?”

“Wait, you're saying people don't fly in this other dimension thing? That sucks! You should just leave things like they are!”

“I-- I can't.” Twilight shook her head. “Here's the problem, Rainbow. There's one you that does fly. There's another you that doesn't. Not often, at least. It's complicated. But what's happening here, it's ... it's mashing the two you's together in a way that's not sustainable. The same thing is happening to the rest of the world, and ... well, if it keeps going, there's a very likely chance that there will be some sort of cascade-failure in this layer of space time, which would collapse both dimensions into a state of permanent, maximum entropy.”

“And that's ... bad?” Rainbow Dash said.

“Very.” Sunset Shimmer said. “Here, Twilight, let me see your notes.” The redheaded pony reached out to pluck the notebook out of Twilight's hands. In the process, her fingers brushed the tips of Twilight's--

--and an immediate shock raced through Twilight's nerve endings, traveling up the length of her arm, through her chest, and kindled a fire between her legs. Twilight gasped, staggering back to lean against a bookcase. Her pulse pounded in her ears, while her pussy practically dripped right there on the floor. Twilight reached up to fiddle with her glasses, to pretend everything was normal-- only to see Sunset Shimmer leaning against the side of her couch, panting. Her nipples stiffened beneath the thin fabric of her bedsheet, two hardened points in a sea of gauzy white.

“What ... what was that?” Sunset sputtered.

“I ... I think it was magic.” Twilight said.

“Aw, how romantic.” Fluttershy murmured.

“No, not like that!” Twilight blurted, only to blink a moment later. “I mean, uh-- not that I'm necessarily opposed to ... that ... sort of thing, Sunset. But I meant it literally. Here, may I?”

Sunset nodded, at which point Twilight reached out slowly, gently putting her hand down on Sunset's bare shoulder. Expecting it, this time, Twilight stayed on her feet as she felt a warm, pleasurable sensation wash over her body, simply from that tiny bit of touch. Sunset swallowed hard, then let out a sigh, muzzle hanging open as she too felt the strange effects.

“I ... I think I know what you mean.” Sunset said, even as she unconsciously ground her rump against the side of her couch. “It probably has something to do with how we're the only ones with our memories intact.”

“Mmmhmm.” Twilight pushed herself away before she could let herself lean in to kiss Sunset's softly parted lips. “It's ... exactly that. Which ... may be the way to fix this!” Twilight shook her head, academic enthusiasm enough to overcome her more carnal desires (however temporarily). “Assuming that you and I carry different dimensional energy, then, in theory, combining those two different energies could create a chain reaction that would force the two dimensions apart, at which point they'd return to their default, parallel states. Like opposite charges on magnets, almost. Or maybe two particles in the large hadron collider.”

“More like a large hard-on collider, am I right?” Rainbow Dash chimed in with a suggestive lifting of eyebrows.

“Rainbow.” Sunset Shimmer glared.

“Uh. Actually.” Twilight said. “That's ... the other thing. As, um, as far as I can figure, a lot of magic here has a ... tantric element to it, which means that the easiest way to combine our dimensional energy fields is to, um ... be intimate.” She scratched at the back of her head, and glanced away. “But if you don't want to, I'm sure there's another way--”

“You're saying you want to--” Sunset Shimmer trailed off.

“Only if you want to!” Twilight blurted. “And, um, if it helps, I ... I wouldn't mind being, um ... intimate with you even if multi-dimensional magical physics weren't involved?”

“Oh.” Sunset Shimmer held a hand up to her mouth. “I never knew you felt that way.”

“I ... um ... I didn't know either? Not for sure. Not until now.” Hesitant, she reached out to take one of Sunset's hands, gasping softly as she felt the electric thrill of magic pulse through her fingers at the touch. “But if it's too much, I understand. There has to be another way to save the multiverse apart from the two of us-- mmmf!”

Twilight's babbling explanation was cut short as Sunset pulled her in for a lengthy, passionate kiss. The purple pony melted into the contact, flaring her wings out behind her. After a short, blissful eternity of tasting Sunset's lips, Twilight came up for air. With a strength that she didn't know she had, Twilight took a handful of Sunset's makeshift toga and tore the bedsheet away, revealing her friend's glorious, centerfold worthy body. Twilight stared at Sunset's breasts: round, just a bit large for her otherwise slim figure, and absolutely perfect. Giving into temptation, the purple-haired woman dove into Sunset's chest, savoring the feel of soft bosom on either side of her cheeks.

Sunset Shimmer squeaked.

“Oh!” Twilight immediately stood up, reaching up to adjust her glasses, which had been knocked askew. “Was that too much? I'm sorry, I didn't--”

Sunset Shimmer just smiled. “No, it's fine. Just ... took me by surprise, that's all. You can keep going if you like?”

“I ... I'd like that.” Twilight said, pulling Sunset's body closer to hers once more. She tried to rein herself in, to take things slow, but the flickering warmth that came from every inch of contact between their two bodies soon overwhelmed her. Before she knew it, Twilight had her lips sealed around one of Sunset's tight, thick nipples. She flicked her tongue over the fleshy nub, eliciting heady moans from her redheaded friend, loud enough to even overwhelm Rainbow Dash's enthusiastic catcalls from the couch.

Twilight faintly remembered Rainbow and Fluttershy were watching-- only to realize she didn't care. All that mattered was Sunset Shimmer's perfect, naked body before her. She worked her way downward, nuzzling over Sunset's toned belly, briefly teasing her navel ... and then there she was, eye-level with the flame-red thatch of hair above the folds of Sunset Shimmer's pussy. Twilight stared at those beautiful folds-- but not for long, as she was unable to resist the temptation to taste them. Tentatively, she dragged her tongue up the length of her friend's pussy, earning yet another lusty gasp from Sunset Shimmer.

Taking that as all the encouragement she needed, Twilight pushed her tongue deep between Sunset Shimmer's tight, soaked lips. Whatever anxiety Twilight might have felt due to her inexperience was soon dispelled by the way each pass of her tongue caused Sunset Shimmer to moan and tremble in new and entirely too interesting ways. Twilight scooted her knees apart, settling in to lap and kiss at Sunset Shimmer's pussy 'til she finally had to stop, jaw getting tired.

Twilight rubbed at her chin, then glanced up at her panting, sweaty friend. “Was, uh ... was that good?”

“That was amazing.” Sunset Shimmer said with a giddy little giggle.

“Did you-- you know--”

“Not yet?”

“Ah.” Twilight shivered again, feeling her tail hike and her wings flare by unconscious reflex. “Then, um ... can I try something?”

“You can do anything you want, Twilight.”

“Okay.” Twilight nodded, then reached over to where she'd abandoned her backpack at the end of the couch, only to accidentally brush her hand over Fluttershy's shoulder-- which is when Twilight remembered her other friends were still there.

“Don't mind us?” Fluttershy said from where she'd sprawled out on her back. She had her legs spread, while Rainbow Dash lay on her belly in front of her, muzzle happily buried between Fluttershy's thighs. The athletic blue pegasus didn't bother looking up from her 'work,' but gave a thumbs-up in Twilight's general direction.

“I'll ... keep that in mind.” Twilight forced herself to look away from Fluttershy's stiff nipples, then started rummaging through her bag 'til she found the double-ended dildo that had materialized in there during the dimension-switching.

“Where did you even get that?” Sunset Shimmer asked.

“I'm not sure, but I think I'm glad I did.” Twilight said, licking her lips. “It's ... it's not too much, is it?”

“Just be gentle?” Sunset said.

Twilight nodded, then reached between her own legs-- it didn't take much to slide the toy into her pussy, given how wet she'd gotten just from eating Sunset Shimmer out. She moaned and panted as the dildo filled her ... but, panting, she looked up and waved Sunset Shimmer over. The red-haired unicorn-woman nodded, then slowly settled down to the floor herself, draping her legs over Twilight's thighs as she moved in. Twilight watched with rapt attention as Sunset guided the other end of the toy into her own sex, fascinated by the way the dildo spread Sunset Shimmer's lower lips.

At some unspoken signal, the two women began to work their hips back and forth-- irregular, awkward at first-- only to get into a steady, ongoing rhythm of hips and knees. Twilight opened her mouth to say something-- anything –but only throaty grunts came out as she watched Sunset's chest bounce with each thrust as Twilight fucked her. Fucked herself, for each cycle of push and pull worked the toy in and out of Twilight's pussy as well.

The tiny studio apartment was filled with sound of moaning women, the clap of flesh on flesh, and wetter, lewder sounds still. Operating on previously unknown instincts, Twilight quickened her pace, fucking Sunset Shimmer harder, faster, desperately trying to slake her lust. Heart pounding, sweat beading on her purple coat, Twilight felt her pleasure begin to crest-- she closed her eyes and let the wave of sensation wash over her, rippling through every nerve ending in exquisite, otherworldly pleasure. The sheer, overwhelming pleasure reduced Twilight to a panting, moaning shell, enough to make her vision briefly blank out to a blinding white. Was the world shaking, or was it just her?

Faintly, at the back of her mind, Twilight registered Sunset Shimmer giving her own gasp of ecstasy as she reached a mirroring orgasm.

And like that, the lusty strength drained out of Twilight Sparkle. She collapsed back onto the floor, entire body going contentedly limp. A moment later, post-orgasmic aftershock rippled through her body, enough to make her curl her toes.

Wait.

Toes?

Twilight snapped her eyes open, then looked down the length of her bare leg ... to the five little toes at the end of her foot. She blinked, then sat up, running her hands over herself. She was sweaty. Sticky. Naked. But human. No horn. No hooves. No tail. No wings. No muzzle. A quick glance at Sunset's bared body showed the same result-- even if she was no less gorgeous in human form.

“Yes! We did it!” Twilight slid the dildo out of her pussy and bounced to her feet in triumph.

“I'll say.” Rainbow Dash said.

Twilight blinked. Turned around. And there were Rainbow Dash and Fluttershy-- again, human. But dressed. Blushing. Staring.

“What ... what just happened?” Fluttershy murmured, a rosy blush tinting her cheeks.

Twilight thought about covering up, but didn't bother-- her friends had already seen everything anyway. “I ... uh ... I know this looks bad, but--”

“BUTTS!” Pinkie Pie said, opening the door behind Twilight Sparkle. Applejack and Rarity walked in behind her, staring in shock at the lewd tableau before them.

“--at least everyone's here so I can explain at once?” Twilight ventured.

“You do that.” Sunset Shimmer murmured as she pulled the sheet around herself once more.

“Oh oh oh! Lemme guess! You and Sunset Shimmer had to get naked and do some kind of cool sex-magic-thing to save the world and now you've returned to this plane of reality and that's why you two are in your birthday suits and the rest of us are confused but also kind of horny 'cause seriously we heard you guys going at it and it sounded really hot!” Pinkie Pie bounced on the balls of her feet, causing her heavy chest to wobble enthusiastically.

“That .... is surprisingly accurate.” Twilight peered at Pinkie. “How did you know?”

“Just a hunch!”

“Wouldn't be the weirdest thing that's happened to me today.” Twilight sighed.

“So is that it?” Sunset Shimmer stood up, glancing around. “Is everything back to normal now?”

“Normal enough?” Twilight said, giving a quick scan of Sunset's apartment-- noting the television in one corner, and the laptop left on an end table. “I mean, nobody's a pony? And the world seems to be back to normal. And I haven't felt any residual side effects from the magic, so ... I guess that's it, then. And the only reason you and I are naked, Sunset, is because we were both the catalyst for the magic, and ... yeah. Which means we'd better get dressed, I guess?” Twilight felt an odd pang of disappointment at the prospect.

“You could get dressed.” Pinkie Pie said-- then reached down to grab the hem of her T-shirt, tugging it up and over her head in a smooth, practiced movement, freeing her large, bra-less tits with no small degree of bouncing. “Or the rest of us could just get naked! No fair doing all the sexy sex-magic without us, you know! Especially when the world's in danger!”

Twilight's jaw dropped. “It's ... it's not in danger anymore?”

“Are you sure?” Fluttershy said, already pushing her skirt and panties down the long length of her legs.

“Fluttershy's right. Reckon it's better safe than sorry, y'know?” Applejack sat down on the edge of the couch and started the process of tugging her cowgirl boots off.

“Mmmm. Must one be entirely skyclad for the ritual?” Rarity languidly unbuttoned her blouse, revealing the lacy black of her bra beneath. “As I'm wearing some of my favorite garters at the moment.”

“Psssh, who cares about your underwear so long as we can get to the fun parts?” Rainbow Dash had somehow completely stripped in under the span of ten seconds, and was already looking over her friends with a hungry, playful look.

“Okay, so there are some side effects.” Twilight Sparkle said, even as her heart began to beat harder in her chest. “But it's nothing that we can't figure out. I'm sure.”

Twilight looked forward to it.