Super Insta Cosplay (Power Girl TG/TF)

"An Insta Cosplay booth?" Connor said with skepticism as he wore a simple pair of dark-blue swimming trunks and a unbuttoned white shirt that showed off his muscular shirt to everyone around him. "Really? You believe that thing actually works?"

"BUT IT TOTALLY DOES! I SWEAR" Tracy, his girlfriend who was wearing a more elaborate swimsuit themed to Supergirl, answered back. "I've read all about it! You enter it, and it transforms you into whichever character you choose!"

"Ok. Tracy. Ok." Connor responded, but clearly unconvinced by his girlfriend's claim.

You see, Connor and Tracy were a strange couple.

On the one hand, Connor was a 6'01" jock of a guy who spent a lot of his free time on the gym or hanging out with his other friends either at parties or at the gym (again). Tracy on the other hand was a petite 5'05" introverted brunette with wide eyeglasses, a knack for books, and an absolute love for anything related to comics.

Given this description, one would have never expected for two people like them to ever be interested in one another. And yet, despite their many differences, the two of them were in a relationship and complemented one another. Connor was thoughtful and caring when she was with her despite what his appearance might have initially suggested, while Tracy became the most extroverted of people whenever she was with him.

Still, there were a few things that Connor did not understand about Tracy.

For example, why would she be so interested in going to a Cosplay beach event.

Or why would she be so eager to use a 'Insta Cosplay' booth.

"Don't you 'Ok' me!" Tracy insisted as she grabbed his arm and dragged him towards the myriad of Insta Cosplay Booths that had been installed on that part of the beach. "I swear, they do work!"

"Tracy, there are a lot of things I will trust your word on, but this is definitely not one of them."

Tracy pouted for a brief second, only for a mischievous smile to appear on her face.

"Let me guess: you're scared to use it."

Connor raised his brow, having a hard time believing that his girlfriend was really willing to go this low.

"No, I'm not."

"Yes, you are."

"No, I'm not."

"Yes, you are."

"No, I'm not!"

"Yes, you ar-"

"Fine!" Connor finally relented. "I'll use that 'Insta Cosplay' booth, but once I get out of that booth simply wearing a cheap costume, I'll be the one grinning!"

"Great!" Tracy smiled with satisfaction, only to then change into a more serious tone. "But seriously. They do wor-"

"No, I'm not going to listen to anything else you have to say until we're done with this," Connor cut his girlfriend, already too committed to his decision of using the Insta Cosplay booth despite the suggestion - or warning - that Tracy wanted to tell him.

"Bu-"

"My decision is made and nothing will change it."

"Ok..." Tracy said ominously as she then walked away towards the nearest Insta Cosplay booth.

Connor then did the same, making his way towards another Insta Cosplay booth that was further in the back. When he entered it, he was taken aback by just how bigger than he expected the inside of the booth was. Nonetheless, the entire place was eerily quite and nearing pitch black darkness if not for the bright screen right in the middle.

Not wanting to take too much time, he swiftly made his way towards the screen.

"Welcome to Insta Cosplay. Please Select Character" a robotic voice commanded him.

Not minding too much about the order he had just received, Connor started swiping his finger up and down the touch screen in order to see what were all the possible characters he could choose from.

To his mild amusement, it was genuinely a huge list. Some of the characters were widely-known household names like Spiderman or Wonder Woman which even a normal guy like him was aware of, but unsurprisingly for an event like the one Tracy had convinced him to go, there were also other far more niche characters like Elsa Bloodstone or Kite Man which he had absolutely no idea they even existed!

"I can't believe I'm actually doing this," Connor muttered to himself as he kept searching on, failing to find any character that caught his interest.

It was then when he realized that there was an option to simply choose a random character.

"I'm too lazy for this," Connor relented as he pressed the random character option, not realizing that that there was the option to specify the result according to parameters such as body build, height, or sex.

"Random Character Selected: Power Girl"

"Wait, wha-"

Suddenly, all the lights inside the booth turned on, revealing a large white room full of smoot mechanical appendages of the same color that looked straight out of an alien abduction movie.

Connor was about to react when things started to happen very fast.

"Deleting Clothes" the robotic voice announced as a bright flash of light momentarily blinded Connor.

Only once he opened his eyes did he realize that he was now standing utterly naked inside of the booth.

"M-MY CLOTHES. W-WHERE ARE THE-"

But before he could finish, the myriad of mechanical appendages suddenly rolled into action, rapidly grabbing him by his wrists and ankles before he could even make take a single step.

"G-GET OFF ME!" Connor violently struggled as they went on to restrain his arms and legs into a spread-out position. "GET OFF ME RIGHT NO-"

"Commencing Transformation: Head"

Immediately, a mechanical contraption unlike the other appendage-looking ones appeared out of nowhere and swiftly encased his entire head. Humming with a low, buzzing sound, only the muffle of his shouts could be heard until the contraption opened again just a few seconds later.

"W-WHAT THE HELL?!" Connor shouted, too enraged to notice not only how his voice had now changed into a deep-yet-undeniably-feminine one, but also how his face was now that of an attractive, albeit slightly older woman, his eyes had turned into a stunning bright-blue color, and his former black hair had now become a dense bob of shining blonde hair that now reached his neck.

And that was just the start.

"S-STAY AWAY!" Connor continued to struggle as he saw more of those mechanical contraptions, all beaming and humming, ready to make a canvas out of him. "D-DON'T COME NEARE-"

"Next: Extremities"

Suddenly, long mechanical pieces wrapped around his large, masculine arms, beaming with a similar low humming sound until soon enough, they opened, leaving in their place a pair of amazonian arms devoid of any blemishes or imperfections whatsoever.

At the same time, two other similar pieces did the same with his legs until soon enough, they had become toned yet feminine in nature, with enough meat on his thighs so as to jiggle after every minute movement.

This was already a lot to deal for Connor, but his eyes soon opened in terror as another, far larger machine appeared.

"Next: Torso"

The machine then settled itself right on his torso and completely encompassed it, buzzing and dazzling as it began to do its work. Connor tried his very best to struggle out of it, but not only was he no match to the machine's sheer power, but the sensation of how his upper body was being modified was wrecking havoc in his head.

The machine kept doing its job for a few more seconds until finally, it detached from his torso just like the other machines had done with the rest of his extremities.

But unlike the other ones, the resulting change was a lot more substantial in nature.

Instead of the flat, masculine chest that he had been so acquainted in the last few years since he had started going to the gym, his chest was now replaced by a startling pair of pendulous breasts that heavily weighed him down, with each one easily having the same size as his very own head.

Connor was too shocked to even decide if what he was seeing was actually real or if this was just a really bad dream, but as he was being utterly overwhelmed by this existential question, he failed to notice how a long, serpentine tube slowly snaked its way around his right leg and towards his crotch. It was only right as it reached his upper thigh that he became aware of its presence.

But by then, it was already too late.

"Next: Genitals"

In one fell-swoop, the tube-like machine shot straight towards his manhood and swallowed it completely.

The tube began to do its work, and Connor's eyes immediately rolled up in ecstasy as he began to vigorously thrust his hips back and forth, his mind and body aching to find release to the all-encompassing flood of pleasure that the machine was now exerting on the region between his mighty, feminine legs. The lustful struggle continued for what seemed to be an eternity until at last, a deep, guttural moan escaped his lips as he experienced the most earth-shattering orgasm in his entire life.

And with that done, the machine slowly decoupled itself from his crotch, leaving his manhood bare.

Except that there was no manhood anymore.

Instead, only a moist slit accompanied by a small strip of trimmed hair right above it was all that remained.

"Transformation Ended. Providing Clothing"

Connor, whose mind was still reeling from the transformation, could only breath in exhaustion as the Insta Cosplay slowly began to cloth him, first with a white undergarment that hid his new womanhood, then with a one-shoulder bikini top of the same color that sported a golden ribbon, and finally finishing him off with a pair of tinted sunglasses.

With that done, the machine then carefully placed him right by the exit of the booth, seemingly ready to just gently move him out in order to accept the next lucky customer.

"Have A Nice Day"

Instead, Connor was then immediately brought back to his senses when suddenly, ice-cold water was sprayed right onto his face, only for him to then be literally kicked out of the booth.

Finding himself once again in the open right underneath the bright, summer sun, Connor simply froze.

What the hell did just happen?

That surely had to be some kind of dream.

Something like that couldn't really happen, right?

But if so, then why did his body feel so different? Why did his chest feel so heavy?

He then looked down, only for his mouth to drop in shock as he saw an enormous cleavage that was being barely held together by a quite revealing bikini top.

"W-WHAT?!" Connor screamed as he realized why his body felt so different. "W-WHY DO I HAVE BOOBS?!"

He then frantically started to turn around in order to check the rest of his body, and to his dismay, his chest wasn't the only thing that had changed.

His backside was now large and curvy, his hips were now wide and feminine in nature, his skin was now pristine and perfect, and most shocking for him, his manhood was now completely, utterly done. He was so astonished by what he was seeing that he failed to notice the fact that he now was taller - almost 6'06" feet tall - and more fit than ever before.

"God, Tracy wasn't lying," Connor said as he was starting to panic. "The Insta Cosplay wasn't a dud at al-"

"NO. FREAKING. WAY!" an unknown, high-pitched voice reverberated right into his very ear. "You decided to cosplay into POWER GIRL!?"

Connor rapidly turned his head towards the direction of the voice, only to see a tall, slender blonde wearing a red-and-blue colored bikini sprinting towards him. Given her svelte legs and her long, fit torso, he guessed the blonde has to be almost 6'0" tall, but given how he still had to look down at her, he had to be even taller than that.

"Y-You have to help me?!" Connor beseeched the blonde, too shocked to even ask who she even was. "I-I entered that Insta Cosplay thing and got transformed into thi-"

The blonde started to laugh before he could even finish.

"Gods, even with that body, I still know it's you," the blonde confessed once she finally got hold of her senses. "Relax Connor. It's me. Tracy. I used the Insta Cosplay booth as well."

This was enough to render Connor completely silent. The person right in front of him was Tracy, except that she didn't look like her at all anymore.

"Tracy..." Connor began, trying his best remain calm - a rather ironic sight given just how imposing and matriarchal he now looked. "What the hell just happened?"

"As I was about to tell you before you decided to just barge into the Insta Cosplay," Tracy started lecturing her boyfriend. "You have to be careful when you use it. The Insta Cosplay booth can be quite a lot to deal with for first-time users, specially if a sex change is involved as well."

Connor remained silent for a few more seconds, trying to internalize what his girlfriend was telling him.

"Is this permanent?" Connor asked, visibly on edge given the huge implications a negative answer would have.

"Of course not," Tracy responded with a positive answer. "Yes, you have to wait three hours to use the Insta Cosplay booth again, but as long as the Insta Cosplay Booth is either open or functional, it shouldn't be a problem."

With the worst case scenario now excluded, Connor was now calm enough to take a second look at Tracy. No longer was she a petite brunette with glasses, but she now was a tall blonde with bright blue eyes and an enviable physique. She actually reminded him of his ex-girlfriend Stacy, another blonde as well. Nonetheless, he was glad that it was Tracy who was in that body given that using Tracy's own words, Stacy was absolutely crazy.

But who did Tracy cosplay into?

It was then when he then noticed the unmistakable symbol on Tracy's bikini top, which quickly answered his question.

"I suppose you're Supergirl, right?"

"Yep," his girlfriend responded. "Which if you ask me, is very ironic given that of all the characters you could have chosen to cosplay into, you decided to cosplay into the MILF version of her!"

"Wait, what?!"

Upon hearing his reaction, Tracy began to laugh uncontrollably again, to the point that she almost lost her balance.

"Yes!" Tracy tried her best to answer as she placed her hand on his shoulder in order to not fall down. "I chose to cosplay into Supergirl, the Kara Zor-El of the current Earth-Zero in the comics. You chose to cosplay into Power Girl, the Kara Zor-L of Earth-Two in the comics as well. Basically, we're cosplaying as the same character, albeit from different universes and in your case, an older version."

"But I didn't choose her. The machine did."

"Using the random character option," Tracy shook her face with disbelief.
"Classic rooky mistake."

There was then a brief moment of silence, only to be broken by her boyfriend

"So what does this mean then?" Connor asked.

"I mean, it's hard to say," Tracy said as she raised her shoulders. "But I guess we're more like sisters now?"

Connor then placed his hand on his forehead and let out a deep breath of frustration.

"God, this is so humiliating..." 

"Why are you being so down about it?!" Tracy disagreed. "I actually think this will actually be very fun! Just imagine it: You'll be the older sister who's super ripped yet super embarrassed to be showing off her body to everyone around while I'll be the younger sister who's super social and who's super into making her older sister feel like home!"

"I suppose..." Trevor responded as he softly placed his hands under his new pair of healthy breasts. "God, these things are large and heavy... I can already imagine all of the guys just looking at them."

"Welcome to being a girl," Tracy concurred as placed her hands under her breasts as well in solidarity. "But given how ripped you are now, I'm sure you could easily break any guys who ogles at you in half if you wanted to."

"So... what now?"

"We're at the beach, Kara!" Tracy teased her boyfriend as she called him by his new alter ego. "We can relax under the warm sun, we can get a couple of ice-cold piña coladas, we can meet other people, and we can totally play some beach volleyball as well!"

"Beach volleyball?" Connor responded, with a glint of interest appearing on his bright blue eyes. "That... sounds right my alley, but... with this bod-"

"Yes, your boobs and your ass will jiggle anyways. But with our combined height and your ripped physique, we should be able to crush the enemy team!"

Connor then scratched the back of his head as a small, albeit genuine smile appeared on his face.

"I-I guess I'd be willing to have one match, but I'll definitely need some liquid confidence to play."

"No problem!" Tracy smiled back as she grabbed him once again by his arm and began to drag him towards one of the many bars that were found throughout the Cosplay Beach event. "And don't worry. Drinks are on me!"

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This was a request from Badger. I changed the setting in order to fit the image better and some of the details of the prompt, but the whole Insta Cosplay prompt  (albeit with a more mechanical and less magical form) and the requested character relationships are still there. I hope you enjoy it! 

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Art by HibrenArt