PE with a Gym Bunny

"S-Sorry I'm lat- hmph!"

Izuku had burst into the classroom in his rush to be on time to class, not noticing that the teacher was already on her way to open the sliding door until he had faceplanted into her chest.

"Deku-ku- ah." Uraraka and Iida were following right behind, encountering the sight of Izuku's head vanishing between a pair of breasts, and blushing profusely at it.

Izuku himself had been briefly stunned by the hit, since past those perky mounds laid a wall of tight muscle he had headbutted into. But the moment he took a step back from his hunched-over faceplant position to try and see what was going on, he went pale out of shock. It wasn't just because of the realization of just what were those soft pillows that were squishing the sides of his head just a moment ago, or that he had ran into a teacher's chest, or that he could be in trouble. It wasn't even because of time slowly crawling forward rather than going at its usual speed, signaling the triggering of his Quirk.

For the most part, he had gone pale because his teacher was none other than the #5 Hero in all of Japan. The Rabbit Hero, Mirko herself.

"Well aren't you an eager one." If he didn't know better, he'd think he could see a slight blush on her cocky-smiling face... oh. His Quirk. Oh no. "You're lucky I like bold moves like these. Now hop-hop to your chair before I kick your cute little butt into it."

She didn't have to say that twice; even Iida and Uraraka had rushed to their own seats in an instant.

"Okay, now everyone, get up and put on your Hero Costumes, and follow me to the Training Kitchen Land!"

"YOU JUST MADE US ALL SIT DOWN!!!" The entire class complained in unison.

"Right, we're here." Mirko turned around, but out of all students in 1A, only Izuku, Iida, Uraraka, Chuzenji, Kodama, Asui, Sero, Tokoyami, Todoroki and Bakugo had arrived yet - the teacher had made them race to the gym and threatened with expulsion if anyone made it there within a normal human's running speed timeframe, rather than a proper hero's.

Iida and Izuku had tied together, much to Bakugo's frustration as he not only came in third, but tied with Todoroki to boot. Uraraka had made herself weightless and clung to Kodama's flying imp form, while Asui, Sero and Tokoyami had grabbed onto Chuzenji's legs with their Quirks when she grew wings to fly her way there. The rest slowly made it there on their own, with some like Kirishima being lucky that they could exploit others' Quirks, like Mina's slippery slide trail in his case.

"K, some of you were damn slow, but you still put some strategy into it. If you're born a weakling who has to depend on teammates for their own heroics, you might as well make the best out of it, punks! Now drop down and gimme fifty! If I see any of you slacking off, you get a VIP ticket to Mirko's Bootcamp." Her voice darkened into a primal growl. "You do not want to be a member of Mirko's Bootcamp."

That got them in a workout mood, alright.

Izuku tried to focus on his breathing and exercising, but it was no use. No matter where he looked, exposed flesh would be there to greet him, as his position in the orderly square of exercising students was right in the middle of nothing but girls. Tried to look ahead? Uraraka's soft, meaty ass would greet him there, clad in that tight cameltoe-forming leotard, while her thighs spilled out of her same-material stockings. To either side? He could choose between Yaoyorozu's breasts being fully visible as she did her push-ups, with those breast curtains doing nothing to conceal them from the sides; or Jiro's much smaller, perky tits also showing from the sideboob on her tanktop, since she removed her jacket for the exercise. Even looking directly at the ground just brought up the thought of pinning Uraraka down he had earlier.

He was *so fucking pent up*. He could barely think straight after Kodama's blatantly sexual teasing and after realizing his control over Uraraka's actions, and that was already after going days without cumming at all, knowing full well that his cum production was at the cusp of what the human body can safely work with.

"Okay team, take five. You're doing alright so far, ain't like those wimps in 2A. Class rep, make sure that after five minutes on the dot, they go for another set." She turned her head towards Izuku before pointing at him directly. "You, the plain guy with the bush hair. Come with me, I gotta take a look at those bruises of yours. Ain't gonna get anywhere if you injure yourself just by arriving to the scene on time."

Wait, when had she- oh gods, he could feel his cock throbbing at the sight. She had taken off her normal clothes, now wearing her hero costume as if she intended the next part of their training to also involve her. The problem was, well...

Everything.

Her nipples were clearly straining against the material. He could see a tiny indentation in the crotch of the costume, likely her swollen clit. And her leotard didn't even fully cover her labia, just half of each lip or so. He could only imagine that the ring around her ass could be visible if she spread her asscheeks.

There was no way he wasn't going with her, both out of intimidation and arousal. She took him into a storage room, locking the door behind her once he had gone in. "S-Sorry for getting bruised so easily, my power is very hard to control, b-but I've made huge progress since I got in, a-and-"

His voice was cut off as he felt a hand patting his crotch from behind. His bewildered, embarrassed face met her cocky, predatory expression as he turned it to his left, right in time to see her licking her sharp fangs with her long tongue. "Let's not beat around the bush, boy. You did something to me earlier, didn'tcha?" Izuku's heart nearly stops in place, but she didn't exactly care about how pale he was getting, and kept whispering into his ear. "Wanna know a little bit of a secret about my Quirk?" Her breath got closer, her lips grazing his ear with every hot word that came out of her mouth.

"It makes me horny all fucking day long. I'm only this functional because I push it out of my system with bloodlust and bravado. But this costume isn't just for looks. As we speak, a massive fake cock is buried in my pussy, made to absorb all the grool I make during the day, while also getting me off enough to go through my day just fine. The bunny tail? It's not actually a part of my body. It's a butt plug. Adds a little bit of a thrill to fan meetups. It's exactly because I'm always horny, that I could tell you did something to me."

While her groping hand massaged his balls from under him, he could feel some movement going on behind him, but eventually she presented a pretty big dildo right at his eye level. "Well? Does that look drenched and overflowing with pussy juice to you, Izuku?" Truth be told... no, not really. It glistened a little, had some sticky lines here and there, but it wasn't drenched or anything, just a little bit sticky.

"N-Not really..." Her grip tightened a little, making him wince in a mixture of pleasure and pain - and causing a small wet stain to spread through his pants. "Not really? Not really?! It's fucking dry! Ever since you ran into me, my Quirk just... stopped making me horny, for the first time in ten years! And it only gets me going again when I'm looking at your cute little derpy face... so this is the time where you explain what the fuck did you lace your breath with, or who did you ask to use their Quirk to make me like this. Be honest and I won't rip your balls off right now."

Yeah, no shot. No matter how much she insisted, he could never blow this secret and ruin the First User's designs for the future. All Might had put his trust and faith on him, and eight phantoms now cheered for his success. He was going to have to either bullshit her, or fight her. Somehow.

He was pretty dead either way.