One after the other, the lights on the Stargait turned on:

Chonk! whirrrrrrr... chonk! whirrrrrrr... chonk! whirrrrrrr... chonk! whirrrrrrr... chonk! whirrrrrrr... chonk! whirrrrrrr... chonk!

Swoosh!

A blueish liquid surface filled the ring, rippling with soft regular waves like a stirred up lake, except that it was vertical. Everypony stared in anticipation, standing in a line a few meters away from the ramp leading up to the gate. It momentarily made Dash forget the silly rainbow socks, the leash, and even the dildos embedded in her nethers. Nopony moved, except for four guards who were hastily bringing in a throne which they sat down near the ramp; then they quickly resumed their positions.

For an apparent eternity, nothing happened, until: plop! Something, or someone pushed through the portal and came to stand on the ramp.

Rainbow's jaw dropped, as she observed the curious creature that stood right there on its hind legs. She didn't know what she had expected, perhaps some kind of ape. But this? What was that even? It was soft and flabby, flesh colored like a pig, and clothed in saggy dark pants and some sort of sleeveless shirt, that was drenched in sweat around its neck and belly. It had grotesquely tiny eyes, and sparse fur, except under its forelegs, where a thick bunch of black hairs sprouted. Perhaps it had some kind of disease that made it lose its fur?

Rainbow couldn't help but twist her mouth at how gross it looked. Or perhaps it was a he? Its pants obstructed any clear indication. She glanced left and right, hoping to meet the eyes of her friends, but they all just kept staring straight ahead. Only Lyra seemed to have an excited grin on her face.

Dash observed the creature slowly waddling its way down the ramp, but then it stumbled and fell on its face. It seemed to Dash like it only walked on its hind legs in order to appear bigger, at which it succeeded. This way, it definitely overtowered all of the ponies in the hall. But on all four legs, it was only slightly taller. Its massive physique really didn't seem suited for walking on two legs any more than a pony's.

The impact had sent a wave though its body that resonated for a few seconds before it subsided. This time it was Twilight who tried to catch her friend's looks. Should she help the human? She hesitated, and in the meanwhile it had picked itself up again and began waddling to the throne, leaving behind a greasy spot where it had fallen on the otherwise pristine floor. It picked up the bowl of chips that sat there and popped a hand full in its maw. Apparently, the journey had exhausted to the point that it needed a quick snack.

Twilight cleared her throat.

“Welcome to Equestria, human,” she said shakily, but then her voice gradually became more firm. The human just turned its head at her and continued chewing.

Twilight spread her wings in an attempt to appear festive, accidentally nudging her friends in the process. “On this great day that you chose to bless us with your presence, we have assembled to express our deepest appreciation for your arrival.”

The human had now turned around and waddled towards the group of tense and confused ponies.

“We have not had much time to prepare, but we hope you will find everything to your liking. If you’d like to oblige, we have a tour through the castle planned. I think you’ll be very interested in that. Or – if you prefer –, we have a chamber prepared for you where you can rest, first. Also, everypony here is happy to be answer any -”

Without turning her head, Dash looked to the side at her friend who had stopped speaking. Twilight, too, had noticed that the human was now standing right in Rainbow’s face, such that her muzzle was almost touching its wet shirt. Rainbow glanced back up at the human’s face and suppressed the urge to recoil when it reached for her face with its soft meaty claws.

A soft gasp came from the right of Rainbow where Lyra was standing. “H- hands!” She excitedly clip-clopped her front hooves on the floor alternatingly. “He’s touching you with his hands. And- and the thumbs, just- wow. So graceful, so-”

Lyra was clearly at a loss for words. Rainbow could feel the warm and moist palms on her cheeks. “Uh-,” she opened her mouth in confusion, but this turned out to be a mistake: on both sides, the shortest finger each slipped in.

“Now he’s using his thumbs,” Lyra continued to marvel. “He’s using his thumbs to- uh. What is he doing?”

“I’wm nawt shure,” Dash mumbled through his fingers. Though cautious not to touch his thumbs with her tongue, she still couldn’t avoid the cheesy flavor to seep toward her taste buds. After a second of thinking she added, “Awnd haow do hew know it’sh a she? Ah mean, a ff- sh- chee?” she struggled to pronounce.

“It’s not a she, it’s a male human. A man,” Lyra explained, raising one eyebrow. “A human mare would have more fatty tissue in the chest area. Though- for this particular specimen that’s probably a bit ambiguous. But the clearest indication is his bulge.” She gave Dash an elbow nudge and whispered, “I think he likes you.”

“Huh?” Rainbow glanced straight down between his arms at his pants. There it was, the quite visible outline of what could only be a penis. Her eyes shrunk to the size of marbles. Lyra kept nudging Rainbow's shoulder until she shook her off.

“Yes, uh, everypony is at your, uh- service and-,” Twilight had just found her voice again, only to lose it again when the human suddenly dropped his pants.

Rainbow just remained perfectly still with a thousand-yard stare. Lyra slowly shifted closer from the side to get a better view on the human's equipment. “Whoa!” she marveled at the thick fleshy piece of meat, caped at the base with dense black fur. When she had opened her mouth to gasp, she hadn’t had the consciousness to swallow, such that a bit of spit sloshed over her lips and down her chin.

Regaining her voice once again, Twilight said, “I see you are taking- interest in Rainbow. If you like, you can... You know... she’d feel honored, if you- uh.” Then she drew Rainbow’s head close with a wing and hissed, “Okay, just remember what we discussed earlier.”

Dash gave her a pained look. “Uh, what was that again?”

“Just stay cool,” Twilight hissed again. “Now relax.”

Before Rainbow had processed the latter statement, she felt a swift tug in her lower cavities that dragged her a few steps backward. The two slick dongers audibly plopped out, drawing along a glistening string of personal lubricant onto her tail. Both holes munched once or twice at the cold air before squeezing shut. Then, Twilight's magic picked up her leash, lead her to turn around, and finally tied the leash to a pole she hadn’t noticed before. She was now looking away from the group, and facing the human dead on with her flankside. All this happened in the matter of mere seconds, leaving her no time to think.

“T- Twilight?” Dash tried to turn her head to look at her friends, but the leash prevented her form doing so. Her tail was glued between her hind legs, which she pressed together as tightly as she could. This was all going way too quick. Was she going to be fucked right here, in the throne room, with all of her friends watching? What was she supposed to do? Was there anything she could do?

“Just give her a minute, please. She’s a little- shy,” Twilight said behind her back apologetically, then she turned to her rainbow friend again. In a low voice, she hissed, “Rainbow, just relax and present yourself. Please!” Twilight’s fear of the human’s powers bled through her words, only making Dash more nervous.

Dash’s jaw locked as she tried lifting her tail, but it just wouldn’t budge. Eyes fixed at the pole that she was tied to, she strained every muscle until her face turned as red as if she were taking a big shit. This feeling of dread was new to her. In all the adventures she had survived, all dangers she had faced, she had never lost control of her body this badly. And everything depended on this.

“Dash! Please!” She felt magic tug at her dock, but it remained firmly covering her crotch. Desperately, Twilight poured more power into the spell in hopes of dislodging the stubborn tail, but it just lifted Rainbows backside up, leaving her trembling socked hooves dangling centimeters off the floor. Still, her privates were neatly covered.

Dash knew what she had to do. She just had to relax her fricking stupid tail, this small string of muscle, but it didn’t want to obey. It was as if the weight of all of Equestria rested on her dock, the fate of the whole universe. The human’s rage would be terrible if she didn’t submit; she knew for sure in that moment. Getting fucked for a minute wasn’t that bad, was it? It was the better option. But it looked so repulsive! Was it already too late now? Was the human already preparing to let loose its wrath? And what were her friends thinking, seeing her fail like this? She couldn’t even turn to see if she wanted to. Tears started to accumulate in the corners of her eyes and she let out a whimper.

“Dash! Please, please, please, -” Twilight, too, was sobbing now, but then her pleas abruptly stopped.

Through her blurry vision, Dash saw an orange blob approach. Then, her head was drawn into a tight embrace.

“Hush,” a soft voice breathed, “it’s okay.”

“A- AJ?” Rainbow wheezed. She’d forgotten to breathe for a whole minute. The tears now poured down her brightly glowing cheeks.

“It’s fine. Don’t worry.” The warmth from Applejack’s body put her at ease. “I’m here. We’re all here.”

“B-but-” Rainbow would have preferred to not be seen in this misery, but if this was how it should end, she was glad to be with a friend.

“Shush~ It’s okay, sugar cube,” AJ spoke with a soothing voice.

“I- I’m sorry.”

“Shh~ now breathe, silly.” She let go of Rainbow’s head for a moment. Blinking, Rainbow noticed her honest smile.

“AJ?” Dash gasped softly.

“Nopony’s angry at cha.” AJ started to ruffle Dash’s messy mane. Then she gave out a pressed laugh and whispered “And did ya see that itty little dick of his? Ya'll probably not even notice when it goes in.”

That comment made Dash smirk. It was true: considering that it – he – was bigger than a pony, the length was significantly below average for a stallion, and the girth was just in the same ballpark. Dash blinked away her tears, and her face grew determined again.

“Y-yeah,” she laughed half-convincingly. “Don’t worry ‘bout me. I can do this. What made you think otherwise?”

AJ resumed the embrace. “And Ah’ll be here for you, no matter what.”

And finally, Rainbow Dash’s muscles relaxed and her tail lifted slowly but surely, up and to the side. A collective gasp of relief filled the room.

“Gimme a little space, here,” Rainbow said to AJ, who let go of her head, then sat down closely next to her.

With an cocky grin on her face, Dash assumed the IWTCIRD pose. She drew her front legs close until her chest touched the floor, then slowly swayed her hips as she spread her hind legs far apart, exhibiting her dark blue lips and soft doughnut. Lubricant had been leaking from both since she had been uncorked; all the clenching had smeared it across the inner sides of her cheeks. Now that she was relaxed, it started trickling down her thighs where it was absorbed by her long rainbow socks. Her drenched technicolor tail – shaking in sync – was dragging along a web of glistening viscous strings.

“Now? What are you waiting for,” she said bravely.

After a bit of waddling – which was even more challenging, now that the human was wearing his pants by the ankles – two familiar moist palms grasped Rainbow’s firm buns, pushing them apart. She slowed her hip’s gyration as she felt her lips being dragged alongside her butt cheeks, until they in turn become unstuck and parted, giving out an almost inaudible squelch.

One or two waddles later, she felt a soft but rigid piece of meat prodding against her tail hole. Of course – with the human being taller than her – the wrong hole was at the perfect height.

“Eh-” Rainbow’s face scrunched up, as if she’d bitten straight into a lemon. Next to her, AJ bit her lower lip and put on an apologetic smile. From her vantage point, she couldn’t see what exactly was going on, but she pet Dash’s mane none the less in hopes of comforting her. Though Rainbow was determined to do whatever was necessary, she wasn’t keen on taking it up the arse. So she tip-hoofed, attempting to instead align her tunnel of life with his dick.

It almost worked; now she felt it pressing against the topmost corner of her slit. But that was as far as her legs could reach. Felling it press stronger now, she was afraid it could slip up and into her soft pucker, so she hopped desperately to bring herself up just that little bit that was missing and-

Plop! it slid right in as her butt plunged back down on his cock.

“Ahhhh~” The glob of meat dragging along her clit, combined with the sensation-enhancing spell elicited a moan from Dash. Simultaneously, the human gave out a hoarse grunt – the first vocalization she heard from this eerily mute creature.

While panting from the small shock, Rainbow felt the stubby fingers slide forward, across her cutie marks, along her sides, and up to her withers. In the process, the human leaned forward, until it was laying prone on the pegasus mare’s back. Taken by surprise again, it was her who grunted now. She had expected him to remain standing, rather than rutting her like an – albeit fat – stallion. She wheezed as she shifted about until she found a more stable stance so she could support his weight better. All the while, her mane was petted by AJ – though Dash wasn’t so sure anymore which of the two ponies the stroking was supposed to calm.

As she stood there, focused on keeping the dead weight balanced, he started to slowly rock back and forth, sliding his meat in and out. His arms were now loosely wrapped around her neck, and his chin was pressed flat against her withers. His warm breathing made her hairs stand on end.

Okay, Dash though to herself, breathing calmly in and out. I can handle this. Just imagine it is a stallion’s- hm, no it’s too short for that. A, um- a tongue. Yeah, it’s a tongue. Somepony’s soft, sexy tongue, and they’re eating me out. And on my back there’s a- a bunch of heavy, soft and warm blankets, because- uh- doesn’t matter.

Having completed her substitution-fantasy, Dash tried to ignore the grunts that were coming over her shoulder, and the drool that was trickling out of his mouth and into her mane. Her back, too, was being drenched in almost unbearably hot sweat which seemed to practically ooze from his chest and belly.

Dash pressed her eyes shut and began softly bucking her hips, opposing his motion and thereby enhancing his thrusts. The mass of fat she was carrying started to resonate in sync. It’s just wet blankets. I’m being eaten out. It’s just wet fat- no, uh- blankets. It’s just- she repeated in her mind over and over again. That AJ’s hoof was still petting her mane didn’t make it easier to immerse herself in her dream, but she didn’t want to risk losing this shallow fantasy, so she said nothing.

Still unsure if she was okay with enjoying this, Dash became increasingly hot and bothered. Apparently she had been successful in talking herself into believing her own words – at least enough, that she could feel a heat growing in her loins, and her own sap slowly replacing the artificial lubricant. Her bucks increased in frequency, vigorously heaving the bulk of blankets back and forth. She purposefully began moaning loudly as to drown out the grunts from her back.

Cringing, AJ finally became aware of what she was doing. She was petting her friend’s mane, who was in the middle of something that was normally best confined to the privacy of a married couple's bedroom. AJ jerkily removed her hoof and looked at it, as if it had betrayed her.

Meanwhile, a wave of bliss was approaching Rainbow. “Yeah, ah~, work that tongue,” she blurted out, unaware of her surroundings. Just a few more bucks, just a little more... And then it hit her like a crash landing. The spell worked its orgasmic magic, and raw energy flooded from her love tunnel through her backside and into her tummy, churning like a thunderstorm of joy. Her wings flared open, pushing up some of the overhang of the wet blankets in the process. Her engorged clit pulsed and squeezed past the flesh that filled her, out into the cold air as if it wanted to escape this siege of pleasure. Her muscles tensed up, threatening to tear, effectively stopping her bucking. Her drooling mouth stood half agape, releasing a decidedly uncool, drawn out squeal of delight.

With strained muscles and stretched out, trembling legs, she stood still for at least a minute. Then, her clit finally gave up its escape plan, and withdrew into the comfort of its home that was Rainbow’s snatch. Her squeal had subsided as she had used up her last reserves of air. And with that, all the energy withdrew from her limbs: her wings dropped down to her sides, and her front legs immediately buckled, making her drop to her knees. Heavily panting, she felt all senses surge back: the hot stench, the sweat drenching her coat, her juices dribbling down her thighs, and her spit-soaked mane. But most of all: the terrible weight on her back that burdened her aching legs. Panting heavily, she couldn’t muster up the will to resist the pressure any longer, and so she slumped down.

Dash panted heavily, lying prone in the shallow puddle of their mixed sweat. The hot fat that cloaked her back and neck was maddening, but she couldn’t do anything about it. All of her energy had been exhausted, and so she had no other choice but to endure it. Even closing her mouth to stop driveling seemed utopian.

With herculean strength, she opened her eyes. She saw AJ give her a worried look. But everything was okay. It’s over, she thought. I did it. It’s o-

Right then, the amorphous mass on her back started rocking again. Somehow, in the process of flopping to the ground, his cock must have slipped out. Once or twice it prodded against her pucker, causing it to tighten up. But that was all she could muster; her face remained complete blank. Luckily, his cock slid to the side, and now he was just humping the soft groove between her anus and dock, and her right butt cheek.

Apparently the human wasn't done yet.

Author's Note

To be continued... but don't expect much, there will probably only be a short epilogue.

If you skipped to this chapter: The intro is actually quite funny, go read it.

Whoa, this sounded way more lighthearted in my head...
Also, this is the first cloppy scene I ever wrote. I'm not that good at making things sexy, but I can make them silly. I hope I could make it somewhat original...

The human character here is an over the top caricature. The portal didn't work so good, so he kind of got changed for the worse when he went through. When he went in, he was actually a well-kempt, all around nice guy. That's also why he can't talk so good now.

He's not related to the guy who swallowed both pills from the witch. He got turned into a pony, that's an unrelated story.