(Content warning: Implicit and explicit sexual themes, bimbofication. You've been warned.)

“Would you like to be a magical girl~?”

They were words that Kaori Kanda had always wanted to hear. Yes, she did, of course she did. The young woman was a massive magical girl fan, and dreamed desperately of becoming one. Magical girl merch plastered her walls, her phone case, her desktop background, anywhere she could reasonably stick something. She stayed up late binging magical girl shows and reviewing them on a blog.

Her intense love of magical girls was why she’d chosen to go to college in Matsushita City despite its reputation as a dangerous place to live - because it was the global capital of real-life magical girls. And in her view, it had been totally worth it since she’d been saved by magical girls at least thrice in her first year! Actual real life magical girls had come to her personal rescue!

So when she was asked if she wanted to be one, she said “Yes” instantly and without a second thought. The next thing she said was “Why? You’re not a cute mascot character or even a shady scientist, Mai.”

Unfortunately for Kaori’s dreams of magical girl-dom, the person who had asked her that was not some magic guardian or faustian bargainer but a fellow magical girl connoisseur and dear friend of hers, Mai Miyazaki. They were roommates in the Matsushita City University’s dorms, and had hit it off from the second that they pulled the same poster out of each of their bags at the same time.

This particular day, they were walking back from a convention from which Mai had suspiciously not purchased any merchandise, and Mai had just asked the question out of the blue as if Kaori’s answer could ever be anything except for yes.

The girl smirked at her, making a show of flipping her hair and thinking about it. “Oh, I don’t know, I may not be offering a magical girl contract or a shady experiment but I may or may not have encountered someone who potentially is in the convention, hehehe~”

Kaori sighed loudly. “Mai. You’re even more gullible than I am.”

“What!? I vetted them! They don’t show up on any records at all, and even criminals would at least have an ID, so they have to be magic!” Mai said indignantly.

“That’s not vetting. That’s… I don’t know what that is but it’s the opposite of vetting. We’re gonna walk there and then we’re going to wake up a day later with one kidney to share or something.”

“They gave me proof! They gave me this magical artifact-” She brandished a cheap plastic wand.

“Do I even have to begin to say everything that’s wrong with calling that a magical artifact?” Kaori said.

“...You know fair point, I’m pretty sure they sold these two stalls down.” Mai said after looking at it for a bit. “...It just looks so powerful and I want it to be real-”

“And you’re a mark, and so am I, the difference is I’m so desperate that I will only allow myself to entertain the chance if there’s an actual possibility that it’s real to save myself from depressing disappointment.”

They talked about it a bit after that, laughing in a good natured way about how dumb Mai had been - the girl herself knew that she was a little bit gullible, but neither of them had realized just how gullible. What was next, going into the unmarked van when someone offered her candy? They were laughing about it enough that they didn’t notice the dark shape sneaking up on them, until it had already shoved Mai over.

Mai tumbled to the ground and Kaori stumbled back in shock. She saw a glint of a knife in the dark. This was the first time since her arrival she’d seen mundane crime, as opposed to supervillain magic crime - this kind of place wasn’t supposed to have muggings! She fumbled for her phone, but the criminal was advancing on her. “I-I don’t have anything worthwhile, I barely have t-tomorrow’s bus faire-” she stammered, stepping back.

The man was oddly quiet, with a mad gleam in his eye that spoke of someone who had seen too much. Kaori fumbled around in her bag - she probably had pepper spray or something right, right? The man was getting closer…

Mai looked up from where she was on the ground. Her bag had been knocked flying, and with it her phone and any particularly heavy objects she could have used as makeshift bludgeons. The only thing in reach was the fake wand. Well, it was better than nothing… she grabbed it, and suddenly felt incredibly strange. And… powerful.

There was a flash of light that forced Kaori to close her eyes. Mai felt it as power flowed into her, as the change began. Her hair grew longer, the black streaked with blonde. She must have gained several centimeters of height, along with some surprising muscle. Her school uniform ripped apart and started to piece itself back together into a new shape, one with a heck of a lot more frills and a bit less actual fabric. The most important change though, was internal - the feeling of pure power that she had.

As Kaori shut her eyes, there was a loud bang - not quite like a gun going off, but a more drawn out and almost electric noise. Then for a minute there was nothing but silence. It was broken by a barely-whispered “holy shit” from Mai. When Kaori opened her eyes, the man was on the ground groaning, and a magical girl was holding out the fake wand, which was now smoking at the tip.

“...Did you see that?” the girl said in Mai’s voice.

“...No, I had to close my eyes. Did you just…” Kaori replied, “Are you…”

“I think I blasted him. Yeah, it’s, uh, Mai...”

“With magic.”

“With magic, yeah.”

The two girls stared at each other.

“I think I’m going to visit those people I mentioned tomorrow.” Mai said eventually. There was a beep-beep-beep from the wand, and a flash of light. A sound like breaking glass echoed in the empty street, and then Mai was back to normal. “...I guess the trial period’s up.”

“...So yeah, you were saying I could go with you right?” Kaori said, still looking between the wand and the mugger.

As the girls left, in hushed but frantic conversation, they didn’t look back. On turning the corner, they wouldn’t be able to see how the man they’d blasted faded away, melting into a black ink-like substance and then vanishing.

Something laughed.

----------------------------

It was the next day, and both girls had hardly slept a wink. This was a real chance, they might be able to become real magical girls! The wand had looked so cheap and fake but it was impossible to deny that it had worked, it had let Mai turn into a magical girl for a little while and then beat off a mugger! After that sort of display, even the harshest skeptics would be pretty firmly convinced.

The meeting place was a bit out of the way, to say the least. The pair of magical girl fans started from the convention center (carefully avoiding the route they’d taken the previous night), and then started following the directions on the card that Mai had been given. It wasn’t easy to get lost in Matsushita’s well planned grid system, but the directions managed it, having them cut through unofficial alleyways and empty lots, until they ended up at a little hole in the wall kind of place in an alleyway well away from where they’d begun.

The girls looked at each other, and nodded. Kaori did still have some minor concerns, about why they had to go to such a shady place… but seeing the proof that this was a real chance, seeing her friend turn into a magical girl and back in front of her eyes, she couldn’t not go. And Mai herself? She’d been willing enough to go on the chance. Seeing, no feeling the confirmation that it could be real? There wasn’t enough common sense in the world to stop her. Both girls were committed, and they stepped into the doorway.

“Welcome, welcome~” a cheery voice greeted them. They’d entered into a dank and dusty shop, filled with knick knacks and curios. The person that greeted them was extremely out of place in his three piece suit, top hat, and domino mask. “I see you listened after all, dear Mai. I was worried you’d think me insincere in my offer of power.”

“Well, I kinda did for a bit, but then I had to use the thing you gave me and it worked and that’s really cool and-”

Kaori clapped a hand over her chatterbox friend’s mouth. “Nice to meet you. I’m Kaori, Mai’s friend. I was, uh, hoping you had room for me too…” she said.

“Of course, of course. The more the merrier, as they say~” the masked man said. “Well then, seeing as we know what you’re here for, why don’t we head to the back room, hmm?”

The back room was actually a bit nicer than the store front, being significantly cleaner and better lit. The room held only a large table and it’s accompanying chairs, although there were clearly over sorts of rooms partitioned off from the main one. The man placed a pair of papers on the table, and pens beside it.

“The deal is simple, my dears,” he said, taking a seat and gesturing for them to do the same. “I shall confer upon you significant magical power. In return, you will do as much as you can to help the people of this city.”

The contract was simple, and to the point. It didn’t have any tiny print under the letters or footnotes. The girls looked at each other again. And then nodded. There didn’t seem to be anything wrong with the contract. “That seems… agreeable. Maybe a bit too agreeable. What’s the catch? Where’s Faust in all this?“

The man smiled, and spread his hands. “I shall admit, I’m not being entirely charitable here - it’s essentially a field test of some new techniques I’ve learned. But you will be entirely in charge of what you do with the power, so don’t worry that I’ll force you to do anything you won’t want to. But yes, I’m not in this so much for a positive difference in the world, but to practice and learn.”

With that somewhat selfish motivation in mind, and therefore making the contract make a lot more sense than just blind goodness, the girls didn’t hold any more objections. They signed.

Both of them gasped, as the contracts glowed and dissolved, and the feeling of magical power flowed into them. They looked at each other and grinned, and then at the man. “Can we try it?” they said at the same time.

The man smiled. “Be my guest.”

The two stood up and backed away from the table, shaking in excitement. Kaori grinned like a loon. “On 3?” she said.

“On 3!” Mai replied. “One…”

“Two…”

“Three!”

The room filled with pink light as the girls transformed, fulfilling their greatest dreams, and unfortunately for them, also fulfilling the unnamed man’s dreams.

For Mai, the change at first resembled her original one - getting a bit taller, clothes dissolving and reforming into something new, longer and blonde-streaked hair. The same feeling of power was there. But this time, something changed. Her height wasn’t the only thing that grew. Her figure expanded, modest b-cups ballooning to D-cups over the course of several seconds, a pinching of her waist and expansion of her hips for a curvier figure. Her bottom grew out into a sexy bubble-butt as well. Her hair went from blonde-streaked to completely blonde in the span of several seconds, and her outfit became significantly skimpier, missing most of the fabric that should have gone between her shoulders and her feet.

Mai had enough time to wonder if that was supposed to be happening, before another shock of magic hit her. This time was different. This time, it felt real good for an entirely different reason. Suddenly the skimpy clothes and the porn star body didn’t seem nearly so important as the intense heat between her legs. She was horny. She was incredibly horny…

Kaori was rapidly to face a similar predicament. The first changes were normal, and resembled Mai’s. But just as with her friend, they rapidly took on a life of their own. Her already long hair rapidly dyed itself from brown to neon pink, while taking on a bit of volume and natural waveyness that she actually liked. But her costume? It was practically a swimsuit, there was essentially a slip of fabric covering her private bits and a strap around the bust - both bits of fabric that were suddenly stretched as her tits ballooned and her ass grew to match.

Her mind didn’t last much longer than Mai’s either - Kaori fell to her knees with her hand dipping below, past her barely-there “uniform”, as her whole body became intensely sensitive. Just the rustle of fabric on skin turned her on, and as a finger dipped in she was already leaving a wet spot on the ground beneath her.

The light faded away, and the masked man was left to admire the two magical girl bimboes he’d created, masturbating away on the floor. It had been entirely too easy to get them to sign that overly vague contract, they were so desperate for power. And well, they’d have power. Power to pleasure and to make more bimbos~!

He cleared his throat. The girls were too busy, in their own sexual worlds. They ignored him. He did it again, and this time dropped his pants.

This time they noticed. The girls scrambled to their feet and suddenly ran to him, pressing him between them. “Hey handsome~” Mai said seductively, reaching down to stroke a certain something with a giggle.

“Thanks soooo much, this feels super great~” Kaori said, kissing her way up his neck. “Maiiii, I think he needs a reward, right~ Right~?”

Mai nodded with understanding. “I bet you’re just itching to try us out~ Well, your little guy is at least~” she said, falling to her knees and beginning to give a few experimental licks. Meanwhile, Kaori pulled the strap of clothing up to reveal her nipples, and gave her melons a bounce.

This was going better than he’d hoped.

Soon, the three were in a tangle on the ground - Mai with her mouth firmly on his penis, and Kaori with her breasts in his face while his hand worked over her sopping wet pussy. The two bimbos were extremely good at their job, making every second pass feel like a month of pleasure. If he didn’t have many things he wanted to do, he’d be fine going at them forever. “Mhm… how about when your friend’s done, you take a ride, hmm?” he said to Kaori as he moved one hand to Mai’s head, keeping her in place for his impending climax.

Kaori pouted. “Awww, I’m sorry, I don’t think I can!”

That was surprising. The masked man frowned. “Why not? It’s not like it’ll take long for me to stiffen again-”

“Because you won’t have a dick once Mai’s done with you~” Kaori said sweetly.

The Masked Man only had enough time to raise his eyebrows before his climax came, hips jerking forward and forcing his cock down Mai’s throat. She looked up at him with a mischievous grin as she sucked and swallowed every drop… and was getting lower and lower to his crotch.

“You must have expected this, silly~” Kaori said sweetly, rubbing his chest which suddenly felt a whole lot more sensitive… “You can’t turn the two of us into magical bimbos with transformation powers, fuck us, and expect not to have any consequences~ Maybe you should have done a bit more testing first, hmm?”

The masked man groaned, looking down at his chest and seeing the budding breasts that were forming, faster and faster as Mai sucked his dick away.

“I don’t think you ever said your name, but since your brain’s about to go ‘pop!’ I don’t think it’ll matter very much… I’ll call you Rin, ok Rin?” She didn’t wait for a response, instead leaning in and giving the man a kiss on the mouth, silencing him and giving him the full force of both of their magics. The breasts grew and grew and grew, while his face grew softer and more feminine. By now, he had become a she - Mai was no longer sucking a dick but eating out a soft, distinctly female vagina. The former man’s body felt so sensitive, all over, that he couldn’t even begin to put up a resistance. Soon, his struggling faded away into pleasured moans and groans...

----------------------------

A few hours later, a trio of underdressed young women walked out of the alleyway. All three of them were exceedingly sexy, with the kinds of unrealistic figures you see on raunchy magazine covers and animated tv shows, but somehow they made it look natural and perfectly fitting. The three were in quiet, giggling conversation, seemingly unaware of the looks they were getting from just about anyone on the street.

A cop walked up to them, blushing fiercely. “Ahem. Excuse me, young ladies.” she said, after a few breaths.

The trio giggled, and looked at her. “Yessss officer~” one of them trilled, and the others laughed.

“You’re, uh… I think I’m going to have to ask you to come with me to the station… we may have to, um, charge you with uh, public indecency…”

“Of course, of course officer!” The lead girl, with pink hair, said.

The woman police officer nodded. “...Thank you for your cooperation?” she managed, nodding to her car.

“Right then! Let’s go, girls.” she turned to the officer. “You mind if Rin here rides up front with you? She can get a bit uncomfortable when she’s in the back seat, you know how it is…”

The three were being cooperative, so why not? The police officer nodded, and headed back to the car.

The girls giggled, and followed the soon to be fourth member of their group...