Sunset’s new Swimsuit

by PleaseDoNotDeleteMe

Rating: mature
Tags: Fetish, Comedy, Equestria Girls, Crossover, Sunset Shimmer, Twilight Sparkle, Random, Twilight Sparkle (EqG), Alternate Universe, Human, Romance
Length: 4635

Sci-Twi and Princess Twilight become a bikini for Sunset

Twilight accidentally casts a spell turning her and her more scientific counterpart into a swimsuit. While they try to find a solution Sunset enjoys a day at the beach with both her favorite girlfriends.

—-

This story was inspired by the above artwork, you can find it as 2052335 on derpibooru.org

I do not own the art work, and I did not ask permission to use it.

It is by an artist called draymanor57

Published 2020-10-02 08:20:01 UTC
Last updated 2021-03-01 16:58:33 UTC

This isn’t permanent right... right?

Sunset hung upside down off her sofa groaning. Her body was drenched in sweat, dripping down her body from every pore and pooling in a puddle at the top of her head. The thin shirt she wore clung to her flesh skin tight. Her arms hung above her head surrounding her in the smell of her rank pits, she could close her arms, but that would expend emergency as well as only heat them up again. The AC in her apartment was busted yet again, leaving the only respite from this heat wave in the form of an oscillating fan. Just outside clear wavy ultra violet waves bombarded the surface. Clear waving lines where visible and insects buzzed.

“Unnggggg” she groaned “It’s sooooooo hot!”

The collar of her shirt looked like she dumped water on her face. Already her shorts where gone, displaying her panties to anyone who would walk by her window she contemplated just taking off her clothes and spending the rest of the day nude. Just then her phone beeped. She sat up and grabbed it off the coffee table, it was a group text from Rarity.

Rarity: “This heat wave is simply unbearable in my opinion. Who is up for a day at the beach?”

Sunset was about to reply when all of her friends in the chat started to before her.

Pinkie: “BIKINI BEACH PARTY!?! Count ME in!”

She also sent a gif of an alligator in a party hat with repeating confetti raining around it.

Rainbow: “I could go for some waves. Just let me finish my work out first.”

Apple: “After I make my deliveries I’ll meet y’all their.”

Fluttershy’s bubble started typing, then disappeared. Then reaped again. Then went away. Finally settling on sending a single thumbs up emoji.

They all seamed to unanimous agree to going to the beach today. Well almost everyone...

Twilight: “I can’t I need to study for midterms.”

Sunset raised an eyebrow and typed: “Aren’t Midterms months away?”

“Never to early to start studying.” she responded.

“NEEEEEEEERRRRRRRRRRRD” texted Dash.

Sunset rolled her eyes and typed: “I would LOVE to go but all my swim wear is in the wash. :(“

Twilight: “You could borrow one of mine.”

Sunset: “No offense Twilight but we aren’t the same size.”

Twilight: “The other me has a spell for that. Just send her a book message and I’ll meet you at your house at 8:00 today.”

Sunset: “Will do, see you then.”

Sunset rolled off her couch cracking her curved spine and made her way to the journal writing a message to Twilight explaining the situation. Princess Twilight soon replied back that she’ll be at Sunset’s house around the same time as human Twilight. Sudden Sunset realized something. She was about to see both Twilights at the same time. That almost never happened, the last time she could think of was months back. She wished she got to hang out with both of them more often. They where both adorable in their own ways, Twilight’s dorky glasses and cute snort along with Princess Twilight’s clumsiness in her human body. Sunset just wanted to snuggle up close to both of them and just... (No. No. No, bad Sunset.) She thought to herself. (Now wasn’t the time to fantasize about what it would be like for their purple skin to rub against her— Dang it! No! Stop daydreaming. Their your friends. You can’t jeopardize that be suggesting that they start dating.)

Sunset looked at the clock 7:28. Just thirty minutes and she could go to the beach. She just needed to keep cool for thirty more minutes.

~~~

Twilight Sparkle knocked on Sunset’s door. Along side her parallel dimension counterpart. The two Twilight’s had caught up on the recent events of their respective worlds on the way. Princess Twilight was very interested in the Equestrian magic leaking through the portal to her dimension, but didn’t really have a way to stop it on her end, though she would look into it after the coronation. Sci Twi was also interested in the lands surrounding Equestria, particularly the Kirin, but Twilight couldn’t answer many of her questions.

Sunset opened the door a funky odor wafted out, assaulting the Twilights nostrils. Sunset was soaking head to toe in sweat and barely dressed her clothes damp. She looked like she had just run a marathon.

“Sunset what happened?” Asked Sci- Twi.

“My AC’s busted, but don’t worry I have a fan and plenty of water.” Sunset responded

Both Sci Twi and Princess Twilight where wrinkling their noses. They couldn’t blame how little the fire haired woman was dressed, the inside of her apartment was practically an oven. Various empty water and Sparkle Cola bottles where strewn among Sunset’s uniform and some towels. The fire haired teens shirt clung to her skin in a way Sci Twi found incredibly erotic. (Ughh, no bad Twilight).

“So why didn’t you just bring a bigger swimsuit?” Sunset asked.

“I want to see what this gem can really do.” Twilight responded holding up said gem.

“Princess Twilight thinks I can use it as a conduit for spell casting.” She nodded over to said princess. “I’ve been looking for an excuse to test it out.”

“Is this safe?” Sunset asked.

“Of course,” Princess Twilight responded, “Expansion is the third spell I ever learned. It’s perfect for beginners.”

Twilight pulled out a white swimsuit from her bag and laid it out on the table. It was a blank two piece that indeed was too small for Sunset, but likely fit Twilights petite body to a T. Princess Twilight began to draw ruins with a piece of chalk on Sunsets table.

“Hey what do you think your doing?” Sunset shouted interrupting the alicorns preparation process.

“I’m drawing focusing ruins so the magic doesn’t go wild.” She explained. “Can’t be too carful.

Sunset remembered her days from magic school. Focusing ruins where mainly used for new magicians to help stabilize their magic. Think the training bumpers on the sides of a lane when you’re bowling. With no further objections Twilight sketched out the rest of the patter. Thought Sunset was annoyed that she would need to clean it up later, she stepped back away from the two purple skinned girls.

Once the circle was completed, Sci Twi pulled out a piece of yellowed paper and began reciting the spell. Listening to it put Sunset back in time to when she was Princess Celestia’s student. Though something was wrong. Sure she hadn’t cast a verbal spell in almost a decade now if Equis and Earth’s orbits where the same. But she was pretty sure Sci Twi was mispronouncing a good chunk of words. Before she was done the ruins began to glow.

“Wait.” Said Twilight “Why are they glowing?”

“Are they not supposed to glow?” Sci Twi suddenly stopped the incantation.

“No, their not.” She explained “The thaumaturgical energy is anathema to the posit—“ before she could finish lightning began crackled across the ruins just for a second.

“That supposed to happen?” Twilight asked taking a step back. Suddenly a swirling yellow and blue tempest formed. Sci Twi tried to run, but was slowly sucked in. Sunset was in utter shock, unable to move at the sight of the vortex of power in her own home. Twilight tried to push her counterpart out of it’s path but wound up getting sucked in as well.

~~~

The two Twilight’s tumbled around and around in the storm. Yellow lightning surrounded them. Surely by now the storm has swallowed at least a city block! But they where the only ones inside. A bolt of energy passed through them both, tingling energy wracking their bodies.

As the two Twilight turned around in the storm they felt their bodies stretching. Their organs and bones were flattened by the pull of gravity. Their clothes where torn to shreds by the storm. They felt their skin become even smoother and stretchy as their forms continued to change. They screamed as their spines arched back and their legs and arms reconnected to their bodies and fused in loops. They felt a tingling even more intense as all their hair was sucked into their bodies. Soon their mouths and eyes fused shut, however they could still see the swirling blue and yellow void around them as they tumbled around like clothes in a dryer. That description became more and more accurate by the second as more and more their bodies grew to resemble clothes more and more.

Particularly Princess Twilight became a bra and Sci Twi became panties. After a few more seconds they fell.

~~~

Sci Twi opened her eyes first. What she saw was a ceiling. Surprisingly Sunset’s apartment was still standing. However it seamed to have grown somewhat. She tried to rise up but found she couldn’t.

(Twilight, you alright?) Twilight asked.

(Yea I’m good.) Sci Twi responds. (What happened?)

(Well this is just a theory.) began her counterpart (But I’d say the ruins sucked in our souls into the clothes along with the unfinished spell.)

Twilight looked over and saw Sunset Shimmer. Hands covering her mouth in shock.

(Sunset this is important, I need you to go and start working on a counter spell.) Twilight began (There should be notes in other me’s back pack. If we don’t hurry... Sunset?)

The fire haired woman began slipping off her shorts and tank top exposing her shapely nude body to the two nerds. She then licked her lips and grabbed princess Twilight.

(Sunset we don’t have time to mess around.) Twilight ordered. (If we don’t hurry, ohhhh) Twilight experienced something like the back of her head being nestled between Sunset’s bosom and felt immense satisfaction as her hooks at the ends of the straps where secured snuggle to Sunset. Then the orange skinned hands enveloped her as she adjusted her breasts. As she did Twilight could taist the sweat on Sunset’s body as if she where licking her. It felt wrong but at the same time she began to heat up with pleasure as more and more of the salty liquid was absorbed into her body.

Sci Twi was next, she began to panic a little as Sunset lifted her up, folding her perspective to her own body. Then she felt the giant step inside her, trailing up Sunset’s legs, she felt her body expand as the nerd passed over those thick thighs till eventually reaching a soft stopping point between her thighs. It felt so wrong, yet at the same time there was a part of her mind assuring her that this was where she was meant to be. She could only imagine her counterpart was experiencing something similar.

She felt Sunset begin to walk slowly the back of her head rubbing against the former demons cleanly shaved crotch. She could almost taist the sweat soaking into her with every step.

Then she stopped in front of a full body mirror.

“It’s peeeeeeeeerfect.” Sunset purred pulling Twilight out of her butt crack, thankfully she couldn’t taist from that end, but she could taist from the front.

(Sunset this isn’t the time to fool around.) Twilight pleaded. (We don’t know if this becomes irreversible after a certain time limit or not.)

(I don’t think she can hear you.) Panties Twilight observed.

Princess Bra Twilight sighed.

(You might be right,) she admitted. (I really am sorry you’re stuck down there after casting your first spell.)

(It’s not so bad.) Sci Twi responded. (At least Sunset shaves down here.)

Princess Twilight blushed hot red. Although it seamed like her fire haired friend didn’t notice.

(Lets just pray this wears off soon.)

Author's Note

I saw this picture and just had to.

Any second now this will just wear off... right?

Sunset Shimmer spent a great deal of time slipping a pair of bootie short jeans and loose crop top on. Though she couldn’t hear them she hoped the two Twilight’s were aware of what was going on around them. She also didn’t know if they needed air or not to survive. Hopefully not given the articles of clothing they were but it didn’t hurt to be careful. She could only imagine what it must be like for the two of them. Stuck as a bikini, holding up her breasts and covering up her groin, constantly rubbing against her skin, absorbing her everything drop of sweat, unable to express themselves in the slightest or even really call for help. She felt an aching in her groin and began rubbing her crotch, bitting her lower lip to surprise a moan. It was almost too much for her to bare. Two of the sexiest nerds she knew were now just strips of purple cloth. Simple bikinis with plane designs rapped around her bosom and butt. She cried out rubbing herself even harder and tweaking her erect nipples through the fabric. She felt a pressure building up, her dam was about to burst. She was almost over the edge, then Sunset glanced at the clock.

“Shit!” She said. “I’m going to miss the bus.”

She had to hurry. Quickly she stopped almost masturbating and slipped on some flip flops bolting to the bus station before it was too late.

~~~

With every step Princess Twilight felt the Sunsets tits rubbing against the back of her head. Up and down. Up and down. She had absolutely no idea where they were going, only seeing the world through the silhouettes of the shirt. The soon to be ruler of Equestria was forced to taist every salty bead of sweat that was absorbed by her, not even able to close her mouth, because she didn’t have a mouth. Even the considerable amount which spilled from Sunset’s arm pits and was absorbed by her straps. What made it worse though, was the small growing part of her mind that was taking pleasure from this perversion.

Without stopping the fire haired girl jumped into an open bus door and took a seat on the old leather couches still panting, heart beating a million miles a minute. Ten seconds later the bus took off from the station and the flopping jiggle of Sunset Shimmers considerable boobs was now a gentle rattle.

Princess Twilight Sparkle of Equestria was very much worried about the mental state of her other dimensional counterpart. She could only imagine what she was going through. Trying to cast her first real spell and getting turned into panties to be worn by one of her best friends. Forced to endure all the sweat streaming off of the sun girl. As well as not to mention being in such close proximity to her friends private parts. And not only that, but said friend going out of her way to jam her in deeper with her fingers. Not to mention constantly getting stuck in Sunsets butt.

She had remained silent for some time. Now that things had relatively calmed down, Princess Twilight took the opportunity to check up on her.

(...How are you holding up Twilight?) she asked through their telepathic connection Sunset Shimmer still didn’t seam any the wiser for.

(🌸❤️~I feel aaaaaamaaaaaaazing~♥️🌸) Sci- Twi responded with. That definitely wasn’t the answer she was expecting to hear.

~~~

Twilight Sparkle’s mind was awash with utter ecstasy. Any thoughts she had slipped through her fingers like jelly. She couldn’t believe her incredible luck. Sure her first ever intentionally cast spell had utterly failed. But if she had known it had failed like this, she would have tried out magic months ago.

Sure originally the science student had been utterly terrified with becoming basically underwear worn by her best friend. But after Sunset began to sticking her fingers against her, jamming her deep into her slit, after she absorbing her friends love nectar into her very being. After feeling Sunsets pillow like ass sitting on her back and thick thighs rubbing against her cheeks. Even right now being nestled their so close to her pussy as she crossed her legs, the jostling of the bus rubbing her against that soaking wet slit, licking up every drop of arousal and sweat flowing into her. Sci- Twi thought of herself as truly being blessed for her current situation.

Never in all her life had she ever considered this kink. The only fetish she knew of till now was feet. However this was something far above anything else in the world she had experienced in her life. All the better was the fact Sunset Shimmer was just as if not more so turned on as her.

Sunsets hand reached down and adjusted her making it more comfortable for the sun colored girl. If she could Twilight would be shuddering.

Perhaps one regret to her current situation was the lack of control she had. Her entire body practically felt like one massive erogenous zone at this point with no way to alleviate how pent up she was.

However in a way, that only added to this unique experience.

~~~

After forty five minutes the bus finally stopped at the beach and Sunset exited. The sun wasn’t even past the midpoint of the day so her and her friends would have plenty of time to fool around. Better still, because it was a Wednesday, the beach was even sparsely populated, leaving plenty of room for her and her friends. If she could just find them now...

“Over here darling!~” an unmistakable voice called out.

Ah, there’s Rarity. she thought.

Sunset Shimmer made her way over to her fiends in the parking lot, where Rainbow Dash was carrying a cooler and Applejack had an umbrella and chairs.

Rarity was dressed in a lovely dark purple bikini matching her hair and complimenting her snow white flesh, Applejack wore an American flag bikini top with jean short shorts, Fluttershy was dressed in a skin tight wet suit, Rainbow Dash was sporting a set of trunks and midriff exposing sun shirt, Pinkiepie wore a pink and white frilly bikini, and Twilight Sparkle... oh right...

Seeing as everyone else was ready Sunset slipped of her shirt and shorts exposing her new bikini to her none the wiser friends.

Rainbow Dash whistled, Rarity nodded, Fluttershy covered her eyes in embarrassment, and Pinkiepie and Applejack nodded in approval.

“That was really modified to be in your size from a spell?” Rarity asked in amazement looking directly at Princess Twilight none the wiser.

“More or less.” Said Sunset with a smile.

“Amazing!” The fashionista said. “Maybe I could get her to teach it to me. I can imagine my cli—“

Applejack grunted.

“Can me mosey on down to the shore already?” Applejack interrupted. “My arms are getting mighty tired.”

Rarity rolled her eyes then turned and made her way to the white sandy coast. Pinkiepie followed cartwheeling. Then Rainbow Dash, followed by Applejack, Sunset, and lastly Fluttershy. The former villainess clutched her chest and smirked to herself whispering: “They were starring right at them and had no idea...”

“No idea about what?” Fluttershy asked from behind startling the Equestrian.

“Oh, um, nothing.” Sunset was sweating bullets and could think of an excuse.

“Oh, ok.” Fluttershy mumbled then continued on.

Sunset let out a sigh clutch her beating heart.

“That was too close.”

It’s over already?

Sunset lay down on the towel stretching out and letting out a content sigh.

“Can I rub sun block on your back?” Pinkiepie asked.

“Are you planing to grope me like last time?”

“He he he, Yea.” She admitted.

Sunset rolled her eyes but didn’t resist as the pink party girl squeezed the bottle of white cream into her hands and rubbed them together.

A soft moan left her lips as the freezing cold sun screen was rubbed into her back be the girls hands.

“*pant* Did you keep the *pant* sun block in the freezer?” Sunset asked.

Pinkiepie’s hands trailed up to Sunset’s smooth shoulders massaging them,

“Of course I did.” She said as if it were obvious, her hold hands trailed down Sunsets front, closer and closer to Princess Twilight. “You are hoooooooooooot~ after all.”

“W-w-we’re in public.”

“Doesn’t that make it even beeeeeetter~?”

Sunset moaned as Pinkie Pie’s hands slipped into her bikini top. Sunset glanced around quietly trying to find out which of her friends could interrupt this. Rarity was talking to Fluttershy, Applejack and Rainbow Dash were busy with some kind of contest, Twilight was obviously unavailable at the moment. It was up to her.

Sunset kicked her friend away. Not hard, but enough to get her off the sun girls back.

“Please just... not right now, do my legs.”

Pinkiepie pie looked disappointed but understood, squirting more sunblock in her hands and began working her hands up and down Sunsets well toned thighs.

She had no problems with making out with Pinkiepie in public. As pantie Twilight her self could tell you, it actually exited her quite a bit. However she couldn’t bring herself to do it with both Twilights watching. Twilight hadn’t been the same since her break up with Timber, if (as she hoped) Sci- Twi was harboring secret feelings for her then she didn’t want to break her heart in this way. It would have defiantly been another story entirely if Sunset had a way to confirm that both the Twilights were unaware of the world around them.

Once her legs were done Sunset turned over and Pinkiepie began rubbing the sunblock over her tummy.

“Wow Sunset, have you been working out? Your core is really strong.”

Sunset blushed at the compliment. Had she been working out? Thinking back all the running around she did on their adventures was probably great exercise. Likely more that the average girl her age got, aside from Rainbow Dash and Applejack or course.

Pinkiepie finished her work by the time Rainbow Dash and Applejack’s rivalry had moved on to the sea. Sunset thought it was finally time to join them and got up from her blanket heading towards the clean blue waves of the great big blue.

~~~

Princess Twilight was freaking out, with every quaking step brought them closer to that terrifying big blue body of water. Even though she didn’t have any lungs, she was hyperventilating.

(Will you calm down Twilight.) her counterpart comforted.

(Calm down? CALM DOWN?!) she shouted. (We don’t know what happens once we’re submerged in water, what if we suffocate?)

(We haven’t suffered anything like that so far.) Sci- Twi reasoned, (I think we’ll be just fine.)

Regardless of her protests, Sunset reached the waves and stuck her toe in, shivering at first before she then began wading through. Once the water came to her waist, Twilight heard a gurgling cry for help from her panties counterpart.

(Twilight? Twilight? TWILIGHT!) no answer came and soon enough the waves would reach her.

Then she heard a familiar laugh echo through her mind, just as she was submerged. Out of reflex Princess Twilight had closed her eyes, and held her breath. Soon she realized that both of those were pointless and opened her... perception? Seeing the sandy ocean floor stretch out before her like she was wearing goggles.

(Told you we’d be fine.) Sci- Twi chided.

(You’re an ass.)

(Technically am.)

Sunset leaned forward and began swimming out to the ocean, the two Twilights watching the sandy floor turn into one of coral.

(It’s a good thing we aren’t taisting salt water.) At Sci- Twi’s comment Princess Twilight realized she was right. They could both taist Sunset Shimmer’s sweat but not the saline of the ocean.

(Why do you think that is?)

(Maybe our ‘tongs’ are on the inside?) Sci- Twi guessed.

(But that doesn’t make sense, we absorb liquid and taist it so why not the ocean?)

(You’re the magic expert, I’m just a scientist.) A long pause permeated before Sci- Twi finally added (You’re enjoying this aren’t you?)

(W-w-whaaaat? N-n- no I am not!) Twilight stuttered. If Sci Twi could, she would be grinning.

(Come on, you’re at least not a fan of feeling up Sunset’s boobs on your back?)

(N-no...)

(Or the taist of her sweat absorbed by your body?)

(... no...)

(Or even the way her erect nipples are probably digging into the back of your—)

(FINE!) Princess Twilight snapped, (I admit it! This is the best I’ve felt in a long time.)

Sunset flipped her body over, going into a lazy back stroke, to Princess Twilight Sparkle, it felt like the two of them were laying on a water bed with Sunset spooning her. She almost wished the yellow skinned girl would get this close to her in her normal body.

Sci- Twi let out a content sigh in her mind.

(This is the life isn’t it?) she asked sarcastically (Part of me deep down hopes this spell never wears off.)

Twilight didn’t comment but began to imagine how that would turn out. Spending the rest of her life as a piece of clothing. Going through the wash. Getting stretched out to her limit. Feeling dizzy she barley noticed Sunset went back to swimming like normal.

For the rest of the day the two Twilights fantasized about what the future held for them, all the while Sunset Shimmer enjoyed a wonderful day at the beach.

~~~

After a long day, Sunset was beat. She was dry but still rather sticky and didn’t feel like taking a shower now. She’d handle that in the morning. Afterwards she would then focus on turning her friends back into humans again.

As fun as today was, if the misfired spell didn’t wear off soon things would probably get difficult to explain to people. It’s not that she wasn’t enjoying every second of this, but they probably weren’t. In the end that was something for Sunset to deal with in the morning.

For now she flopped herself face down on her covers and began snoring.

~~~

Some time into the night, Sci Twi opening her eyes and found her head laying on top of Sunset Shimmer’s crotch. But that wasn’t what woke her up. What was interesting was the fact she felt her entire body now hanging off of Sunset’s bed. She felt her back arch, realized she needed to breath now, as well as the fact her hair was a tangled mess and her body stank of sweat and sea water.

She glanced up hearing a groan and saw her other dimensional self also naked and glistening with sweat and other fruids draped over the nude as well Sunset Shimmer.

“I guess the spell only lasts twelve hours.” Sci- Twi commented.

“Seams that way.” The other Twilight slowly sat up creaking her back.

“I’m so sorry your first spell went this wrong.”

“Don’t be.” Said Sci- Twi “It was... a lot of fun.” She said blushing.

“Yea.” The other Twilight also blushed “I guess it was.”

She then looked down and covered her exposed breasts.

“Well, what do we do now?” Twilight asked.

The pony princess Twilight looked down at the snoozing sun girl and smiled.

“Oh... I’ve got an idea or two...”

Author's Note

I’m going to be honest. I am not satisfied with how this story turned out. I couldn’t think of a way to end it so it was just sitting here half finished for over a month so now I decided to finally rap it up. Sorry to those who were enjoying this, I have several other stories as well as real world stuff to work on. Thanks for getting this far into this mess of a story, I may continue it later if I think of something but this is the end for the foreseeable future. Back to work on my other stories.