Help Deku

You realize there's really only one choice here, and as such, you get up and rush over to the struggling hero, tits jiggling a little along the way. (You're not a fan of bras, so you wear them as little as you can get away with.) You kneel down beside him, and his beautiful green eyes land on your ocean blue ones. "Who are you?" he asks, confused.

"My name is Yamada Ren," you answer with a tiny blush. Hesitating a moment as your heart races, you add, "I'm here to help you." And as Deku blinks, you reach out and start undoing his bindings. They're tied really tight, but you've always been really good at undoing knots, and soon most of the cloths are gone. Your hand accidentally brushes against his leg, however, as you try to free his legs.

Deku, who is sitting up, smiles at you and opens his mouth to try to say thank you, only to blink and blush, squirming. "W-Whoa!" he yelps, newly freed hands shooting up to clap over his mouth. "My... My body feels..."

He bends over, panting a little as your Quirk's effect starts to overtake him, and you pale.

"S-Sorry!" you squeak, scrambling away and bowing low. "I d-didn't mean to -- it's my Quirk, I touched you and now..."

Before your eyes, Deku is slowly losing height, shrinking several inches. The hero of average height now stands at only 5'2", shorter than you, even; you're 5'3". Your mouth opens in awe as his hair grows out, messy green locks flowing in every direction as they fall down his back. Meanwhile his arms retain their muscle mass but also grow slimmer, his fingers growing daintier and more feminine. His face loses its masculinity after that, chin turning heart-shaped, nose becoming smoother and smaller, and eyebrows losing their slight bushiness. "This is... your Quirk?" Deku repeats, brows furrowing, and you blink -- his voice is already so pretty and feminine.

"Yeah, I call it 63-Mix Up," you tell him, pursing your lip awkwardly. "Um... It makes anybody I touch turn into the opposite sex. Boys turn into girls, girls into boys. I can only control whether it works or not on myself."

"So, I'm changing into a... a girl?" He blushes deeply as his hero outfit starts to become more feminine, and this reveals his hips as they start to tuck in, womanly curves appearing. His toned six-pack is unaffected, though his outfit stretches out to accommodate the new breasts developing beneath it. He shudders, letting out a tiny moan as they grow, which causes him to blush again. "M-My body feels so... hot..." he groans, chewing his lip before crunching up while his hand shoots down to his waist. "C-Crap, wait, wait--" He freezes. "It's... it's gone..." His ass begins to expand, becoming a nice and thicc (as your friend Neji would say) shape. All in all, Deku is a bombshell of a girl now, the kind you as a bisexual girl would definitely go super gay for. If anything, he's even hotter with this body.

"O-Oh my..." you manage to **** out, blushing.

He winces. "I-Is it that strange?" he asks in that high, pretty new voice of his.

"N-Not at all, y-you actually look really... um... really beautiful..." you admit in a small, embarrassed voice. Your Quirk seems to like turning guys into very beautiful, curvy women and girls into very handsome, muscley men. You have no idea why.

"Oh. Uh... thanks."

Well, thanks to all of that, his legs are slimmer, so he's able to slip free of the last of his bindings, now, and he stands up, glancing off in the way the villain escaped to. "She's probably long gone, now," he mutters. He... she? ...You're just going to respect his mental identity and call him he for now unless he decides he wants to be a girl mentally, too. He glances over at you, shifting awkwardly in his new body. "So, uh, a-about your Quirk... can you, maybe, change me back?"

"...Unfortunately I can't, not for a long time," you reply with a bite of your lips. "For some reason, it seems like I can't use my Quirk on the same person again for three months."

"Three months, huh?" Izuku sighs wearily. "Guess I need new clothes then..."

Your ears perk at that. You were already going shopping... maybe you could offer to take him with you?