“I certainly hope this “thing” you found is as exciting as you’re making it out to be.” Momo Yaoyorozu said apprehensively as she was ushered into the bedroom of Mina Ashido, her friend and fellow hero in training who had abruptly burst into their dormitory babbling about some “super amazing thing” they had found that she “absolutely had to see” right this instant.

“It is, trust me!” Mina beamed, the mysterious object of attention held behind her back until they were alone and undisturbed. “Tadah!”

Mina whipped out what to Momo’s surprise turned out to be a strange-looking corset. Momo didn’t know what she had been expecting, but it certainly wasn’t that.

“I didn’t now this sort of thing fit your, uh, fashion sense, Ms. Ashido. I’m sure it’ll look, um, rather mature on you.” She coughed, trying very politely not to sound underwhelmed.

“No, that’s not it!” Mina insisted. “Well, I mean, it is it, but it’s not just any old corset! It’s a party prep kit!”

“A what?” Momo was befuddled. “It just looks like an ordinary corset to me. I’m sure that’s somebody’s idea of a party, but-”



“Just watch, okay?” Mina declared as she began to cast off her clothes, stripping down to nudity with startling quickness.

“M-Miss Ashido!?” Momo attempted to avert her eyes, but Mina grabbed her head and pointed it back at her.

“You’re gonna miss it! The instructions said you have to be naked when you use it. Watch carefully, alright?” Mina giggled, and Momo had to admit that her curiosity was piqued. Now that she looked closer at it, it had a rather strange design, and Momo suspected that this was no ordinary corset, although she had no idea what it was about to do.

“Just put this on here,and the instructions said it should do its thing automatically…!” Mina said as she clumsily did up the corset, then grunted as she pulled it tight. As soon as she did so, Momo agreed that the corset was as impressive as Mina had hyped it up to be.

Immediately, Momo nearly jumped back as Mina’s bust bulged outwards, visibly bouncing as it doubled in size and wobbled in the corset’s cups. Mina let out an impressed “ooh” before her hips followed suit, almost popping out to the sides as she turned into a perfect hourglass. Her hands instinctively went to her already respectable butt, which proceeded to double beneath her palms into a globular bubble butt, thighs filling out to match.

“G-Goodness!” Momo exclaimed as Mina gained even sexier proportions than herself in an instant, and she hadn’t exactly been lacking in the first place. Whatever Quirk had been used to create this thing worked quickly, and Mina seemed delighted by it.

“Yes! Nice!” Mina practically applauded as she put her hands on her waist in anticipation, almost cheering as it caved inward into a heavily exaggeratedly thin waist that managed to carry her hourglass with aplomb.



“Is it just me, or are you getting taller too?” Momo noticed, the two hurrying over to Mina’s mirror.

“Not just taller, older! That’s supposed to be part of it too.” Mina explained as she visibly aged from a teenager into a woman in her mid-twenties, her face going from pretty to beautiful as she exited puberty and truly blossomed. She didn’t gain too much in height, but it was enough for her to be visibly taller than Momo, and her short, frizzy hair grew out along with it, reaching halfway down her back in a style that she was unused to, but certainly suited her.

Finally, the corset itself seemed to change. Momo noticed thin strands extend out of it, which reached down Mina’s arms and legs where they seemed to weave themselves into a complete outfit. Long gloves formed around her hands, and the corset grew a long slitted skirt that fell down her sexy legs and glittered a deep purple similar to the one that adorned her hero costume’s pattern. She gained a couple of extra inches from added high heels, completing the glamorous image that the name of “party prep kit” promised.

“Perfect! I look even better than I expected!” Mina said happily, posing in the mirror to show off her curves.. “What do you think, Momo?”



“You look stunning!” Momo was thoroughly impressed, both at how good Mina looked and what the kit was able to achieve. “I might just find myself asking where you got such a thing!”

“I’ll tell you when I get back from my date, I think I’m already late!” Mina checked the clock, Momo double-taking.

“Wait, a date? With whom?” She asked.

“Midoriya! See ya!” Mina winked before sauntering out the door.

“I see, have fu-wait, who!?” Momo called out. She wasn’t sure whether to be more surprised by the transformation or Mina’s choice of dates…