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Most of Aizawa’s students have been going through a lot of changes lately. It has a lot to do with them nearing graduation, and the experiences they gather throughout training and internship years clearly manifests on them physically.
The most notable ones are the one’s on top, of course. Iida has been practising a lot of hand to hand combat lately because he soon realized that he can’t always rely on his quirk. Bakugou has been having trouble propelling himself, so he changed his exercise routine to develop strong but leaner muscles. Kirishima has been learning fighting styles after fighting styles because he knows his body can take it.
And Midoriya, he’s the one who improves so much ever since the whole class started their first class over two years ago. From that small, clumsy young boy, he certainly grew into what Aizawa is sure will be the greatest hero of all time.
As much as a lot of his students are growing and changing into the best version that each of them can be, he can’t help but notice at least one of them… being a bit distracted, so to speak.
Not really distracted in a sense that she’s falling behind. Yaoyorozu Momo is still top of the class, refusing to yield her spot to Bakugou, Midoriya or even Todoroki. She’s in constant hold of the top spot, and Aizawa has no worries about her academic excellence because he knows she’s smart.
What worries him is her health.
Lately, she has been -- how would he say it -- putting in more weight.
It’s actually just barely noticeable, but if you’re like Aizawa who takes note of his students’ growth. It’s been two weeks since he started noticing it, and Yaoyorozu only seems to grow more and more. He has taken notice of more puffier cheeks and a costume that could bust at any second. Sure, she’s still in shape, but there’s no denying the thicker thighs and bigger breasts, the light bump of her stomach and her arms that’s a bit wider than normal.
Not that Aizawa is staring. It was merely an observation.
And it’s also something that turns out to be very hard to put into words without seeming like an old creepy man staring at young girls from a distance or an asshole. But he knows he has to say something, or else what is currently just Yaoyorozu lagging behind for a few seconds to catch her breath will be her struggling to keep up with the others in a real fight.
Maybe he'll tell her next week, after the next training activity. He’ll observe how she’ll do in the match-ups and if her weight is actually starting to pull her back from being more efficient, he’ll intervene.
But by the time Monday comes Yaoyorozu is back to normal.
She joins in by the circle of students waiting for assignments with Jirou. Yaoyorozu’s body isn’t threatening to burst out of her costume anymore, her legs and arms now leaner and more compact.
Aizawa almost thought he was just thinking things, but it can’t be true if he’d been noticing it for two weeks. And Yaoyorozu wouldn’t be able to shave off that much weight in just two days.
Maybe she can with her quirk, though. It means either she made a lot of things yesterday that staved off the fats or she purposely made herself gain weight to create something really big or complicated in one go.
If she was testing the limits of her quirk then Aizawa guesses he doesn’t have anything to worry about after all. He should have known that his students are smarter than they look. But sometimes he can’t stop himself from caring, they did carve their way into his heart.
Everything continues normally. The activities were a success, everyone figured out their remnant weaknesses that they might have overlooked while working themselves hard.
The only thing that’s different is that when everyone is supposed to get ready for their internship that afternoon, Yaoyorozu has asked Aizawa to stay at the classroom because she still has a few questions regarding Hero Law and other topics that will be included in the final examinations.
The kid must have taken up too much of her time practising with her quirk last weekend to review for it.
Aizawa stays behind, rearranging paperworks and essays submitted that day as the rest of the class piles out of the room. Yaoyorozu remains at her seat, staring at Aizawa with an intense gaze that makes him a bit uneasy.
It’s his student, what’s he thinking? She’s probably just nervous. It is the first time in all years that she has asked for help.
The last of the students leaves, leaving Aizawa, Yaoyorozu, and his sleeping bag inside. The classroom door slides shut.
Yaoyorozu smiles at him as she stands up. She’s carrying a bright pink food box. “Thank you for staying behind for me, Sensei.”
She places the food box in front of Aizawa gently and slides it closer to him. “I figured I should at least bring something as thanks for agreeing to answer my questions.”
“You didn’t have to.” Aizawa eyes the box. It’s Yaoyorozu, one his brightest pupils, but with everything that happened to the class, he can’t help but be a little wary.
And Aizawa can’t place it, but there’s something strange with the way she keeps on staring at him, her eyes raking through his body even when half of it is covered by his desk. He clears his throat and Yaoyorozu’s attention snaps back to him. “Take a seat and let’s start, then. Thank you for the…”
“Cookies,” Yaoyorozu continues, then she sits in the front seat. “Oh, and milk! Satou says they compliment each other, so I brought some, too.”
“I see.” Aizawa pushes the back aside and leans at the table. “So what is it that you need help with?”
Yaoyorozu frowns, for what reason, Aizawa isn’t sure. But as fast as it comes, it’s gone, replaced by a cheerful smile and an enthusiastic question.
Aizawa isn’t sure how long they’ve spent there, but Yaoyorozu’s questions and concerns come in waves that don't seem to stop. That is until she glances at her wrist watch and pouts.
“I apologize, Aizawa-sensei, but could we continue this discussion tomorrow? I’m afraid I might come late at my internship.” She smiles. “Please enjoy the Milk & Cookies, they really are the best!”
Aizawa nods. “Same time tomorrow, then.”
Yaoyorozu bows before she promptly leaves. Aizawa sighs as he tucks the stack of essays under his arm. He is about to stand up when his eyes land on the bright pink food box at the side of his table.
His stomach growls. How late is it? He vaguely remembers missing lunch in favor of sleeping earlier, but his sleeping bag ended up being weird and he didn’t get that much sleep either way.
Aizawa opens the box and the smell of freshly baked cookies greets him. Even if it’s already hours old, the biscuit still seems to be crisp. Baked until golden brown with bits of chocolate chips melted slightly on top. There’s a thermos beside the cookies that still feels cold in his hands, Aizawa opens it and sees the chilled milk inside. It smells creamy with a hint of vanilla.
What’s the harm in a bit of snack?
Aizawa takes a piece of cookie, the pastry feels oddly heavy between his fingers, but he shrugs it off and takes a bite. The perfect mix of sweet and salty spreads through his tongue, followed by the chocolatey flavor of the chips. The cookie is crispy and crumbly, a texture that Aizawa seems to suddenly crave.
He pops the rest of the cookie in his mouth, savouring the delectable flavor it has. It’s no doubt better than the one’s from the bakeries that Yagi and Yamada always drag him to.
Before Aizawa knows it, he’s taking another one and chewing thoroughly. Then another one, and another. As he grinds his fifth cookie in between his teeth, a sudden sharp pain in his throat makes him choke. Too dry. Aizawa’s hands grab the thermos and he unscrews the lid off, he drinks gulps after gulps of the chilled milk to ease the line of pain.
The taste is exquisite, Aizawa isn’t sure what kind of milk it is by taste alone. It is as creamy as carabao’s milk, but something about it doesn’t taste like it. His throat doesn’t hurt anymore, but somehow he can’t tear himself away from drinking until he’s done.
Aizawa’s head mentally chastises himself for acting like a child when he lifts the thermos up a bit and catches the remaining milk drops with his tongue. He sighs as he tastes the last droplets, tastebuds singing in delight with how good it was.
But as soon as Aizawa places the thermos back down, his eyes start drooping heavily. He yawns. The urge to sleep chants in his head louder than usual. Huh. Maybe he could just lay down for a bit?
In the middle of a daze, his eyes catch sight of his yellow sleeping bag. Is the color a bit duller? He should remember to wash it tomorrow and use the other one. Aizawa yawns again, steps wobbly as he struggles not to fall. He can sleep in the sleeping bag and no one will dare disturb him.
By the time he slots himself inside, he grunts at that uncomfortable feeling. It’s the same as earlier, and he’s not even sure what’s causing it. But somehow the sleeping bag feels different. But he’s too sleepy to even think about what makes it different.
He doesn’t even realize he’s already asleep.
It’s hot. That is Aizawa’s first thought as he tries to wiggle around and unzip his sleeping bag. He can let air in with just a bit of entrance.
Only the zippers aren’t budging. There’s no zipper. At all. This isn’t his sleeping bag.
“What the…” Aizawa tries to open his eyes, but it feels so hot and he’s so sweaty that he can’t focus on doing anything. He tries to wiggle around again, only stopping abruptly when he feels the build-up of weird heat under his skin.
“Oh, you’re awake, Sensei!” Yaoyorozu’s voice makes Aizawa’s blood boil, a deep raw desire tries to take over his mind. He grunts and struggles, his mouth feels too dry to form more words.
Aizawa’s eyes shot open at the feeling of warm hands cupping a bulge in his crotch that he didn’t even feel grow. “Yaoyorozu, what are you--?”
“Please, don’t try to fight it.” The bright gleam blinds Aizawa’s sight for a second before he realizes that it comes from a blade. “You’ll give in soon, Sensei.”
And then there’s ripping. Yaoyorozu cuts a hole right around Aizawa’s visible erection, careful not to cut him too. She throws the blade away from them.
“Is this a quirk that hit you, a pollen type?” Aizawa bucks up uncontrollably when he feels Yaoyorozu’s warm hands touching him through his pants. He tries activating his quirk, thinking that whatever fucked up quirk hit her will disappear too. “S-stop, get a hold of yourself, Yaoyorozu!”
But he can’t activate his quirk. Panic settles in him as he realizes just how completely restrained and helpless he is. Another wave of heat crashes over Aizawa’s body, making him hiss.
“My, my, sensei, you’re already so hard. Those cookies really did their job.” Thin fingers work on getting his cock out of the small hole. “Since you’re still lucid, I’ll explain what happened. I know you’ll go under sooner or later anyway.”
Aizawa hisses when he feels Yaoyorozu’s finger brush against his bare skin. He tries to get himself free again, but to no avail. He needs to think of something fast before Yaoyorozu does something she’ll regret.
“I mixed in some aphrodisiac with the cookie dough, but it’s not important what it exactly is. Don’t worry, it’s not strong enough to kill you.” Yaoyorozu finally succeeds in pulling out Aizawa’s hard erection. The tip is glistening with precum that the aphrodisiac forced him to secrete.
Yaoyorozu wraps her hands over the shaft, awe written in her face, as well as surprise. She whispers, “My, you’re bigger than I thought...”
As soon as Yaoyorozu’s soft fingers curl around and she gives a single stroke on his aching cock, it seems that the heat pooling under Aizawa’s skin bursts; a wild combination of pain and pleasure making him seize up and gasp.
Yaoyorozu slides her hands up, gently collecting the precum at the tip and sliding it all back down. “I can barely hold you with two hands, sensei. Are you really this big or is the aphrodisiac messing with it?”
She doesn’t let Aizawa react as she leans closer and starts giving kitten licks along the length, as well as swirling her tongue around the tip. The taste of precum is bitter on her tongue, a side-effect. But it’s one she’s willing to take. “I’ve been waiting for so long to do this.”
“I tried flaunting my body more, you know, but you never noticed me.” Yaoyorozu opens her mouth and lolls her tongue out lewdly, before attempting to sink down and swallow Aizawa’s dick deep in her mouth.
Aizawa’s dick stretches her mouth wider than Yaoyorozu expected, but she holds her ground and continues taking him in her mouth.
The warmth that envelopes Aizawa is enough to drive him mad. It feels so good and it’s making the itch and heat under his skin subside. His hips buck up on their own, but the sleeping bag traps all of his movements.
Aizawa shakes his head, he needs to recollect himself and do something or else both of them are going to be in a lot of trouble. But the itch in his skin grows when Yaoyorozu pulls away.
Aizawa watches as Yaoyorozu pulls away. “Not even going to make a sound for me, sensei?” She wipes away the excess drool that dribbles down her chin.
“I think I know what’ll make you crack.” She licks her lips before standing up and lifting her skirt, just enough so she can pull her panties off. Aizawa’s eyes widen when Yaoyorozu lets her lacy panties drop to the ground.
He has a knife somewhere, if he can just reach it underneath, he can free himself and stop all of this.
A sudden surge of itch and heat in his body stops his track of thoughts. Yaoyorozu snickers. “Your body is digesting the aphrodisiac well, in just a few minutes, you’ll start enjoying this too.”
And she’s right. Aizawa knows he’s slowly losing himself to the animalistic desires seeping through his mind, the chanting of lust right in his ears, and the urge to have something wet and warm to bury himself into.
But he also can’t let himself give in, this is his student, he’s here to support and protect them, not take advantage of them for his own pleasure. Aizawa needs it, his knife, he can break free and run or subdue her so that this wouldn’t continue.
“Is the sleeping bag tight? I made it myself.” Yaoyorozu swings a leg over Aizawa, effectively straddling him. She has her back facing him, plump ass cheeks on display as her skirt rides up. “I swapped it in place of your real one, it’s the perfect body trap.”
Aizawa fiddles underneath, hands fumbling and feeling everywhere for the hilt of his blade. He needs his knife to move and free himself and get away before he loses control.
“I stored lots of fats in my body last week so I can make it perfect.” She pulls her ass cheeks apart, giving Aizawa the perfect view of her asshole stretched around a gem… A butt plug, Aizawa’s lust filled brain supplies. “But you probably don’t want to hear anything more about that.”
So that’s why she gained weight. In the middle of the haze, Aizawa’s brain can only manage to construct short facts, observation, before the lust takes over again. Need the knife to move and free himself and get away--
Yaoyorozu stares at Aizawa over her shoulders, her eyes blown with lust and longing. She traces a finger over the gem encrusted plug before ever so slowly pulling it out. “I made this myself, too. I know I’ll need the stretch. And I am right, you’re a monster, sensei.”
Aizawa’s fingers brush against a hard object, and the blood in his veins sing as he reaches again to hold it properly. He needs his knife to move and free himself--
“As much as I want to actually feel you inside me.” Aizawa watches as she lifts herself up and uses a hand to position his dick, the angry red tip pokes at her entrance. “I can’t risk getting pregnant, not now that graduation is near.”
Yaoyorozu lets out a sultry moan, eyes closing to focus. Then a second later, lube is flowing out of her asshole and dripping directly at the head of Aizawa’s cock, making him groan as it flows down the shaft and pools in his groin.
She adjusts her position to properly reach down and give Aizawa’s cock a few firm strokes to coat the lube evenly. “There we go.”
Knife. He needs his knife to-
Yaoyorozu moans out as she slowly sinks down, her asshole gobbling Aizawa greedily. The stretch still burns, but Yaoyorozu is focused on finally being able to do it with her teacher. “Sensei!”
Aizawa finally manages to grab the hilt, twisting with all his strength until the blade pokes at the side of the sleeping bag. It rips the compact cloth and continues to cut through until he has himself free. Aizawa takes Yaoyorozu’s blissed out moment to switch their positions.
Yaoyorozu shrieks at the sudden movement, and the next thing she knows is Aizawa’s hands wrapping around her hips and the floor of their classroom coming closer and closer to her face.
But it doesn’t hit and hurt her like she thought it would. It did touch her, her cheeks are pressed flush against it as she looks to the side. She sees the yellow body trap all torn and destroyed, then her sight moves to the man now above her.
Aizawa’s hand is on the back of her neck, keeping her in place. She wriggles, but her hands are pinned at the small of her back. Red creeps up her cheeks when she realizes the position they’re in, the thought that they’re in such a dirty pose sends arousal in her.
Yaoyorozu can also feel Aizawa’s cock twitch, still balls deep in her ass. She feels like she’s about to be fucked like a botch in heat, ass high up in the air like this.
“How much aphrodisiac did you put in the cookies, Yaoyorozu?” Aizawa’s voice comes out pained and raspy. The heat underneath his skin simmers as he’s buried deep inside his student, but it itches for him to move or do something. He wonders if Yaoyorozu can feel it. “I ate all of them.”
“I- one cookie is enough to make you aroused after an hour…” Yaoyorozu whines when a sharp pain shoots around her breasts, the mounds of flesh are being squashed against the cold floor. “I didn’t think you’d eat all of them!”
Aizawa flinches at yet another surge of heat crawling in his skin, breaking out of his pores and forcing him to thrust. “You fucking what?”
Aizawa swearing sends a jolt of electricity up Yaoyorozu’s spine. She gasps. “Sensei, I-”
“Shut up!” Aizawa’s hand on the back of her neck pushes harder, making her whine. “Shut the fuck up, fuck.”
He needs to pull out, right now. He can’t do this, and Yaoyorozu is probably driven by teenage hormones and he can’t just-
White hot pain shoots through Aizawa’s body when he tries to pull all the way out, he has to thrust back in to alleviate the pain.
Only when Yaoyorozu lets out a choked moan did Aizawa realize what he has done. “Sensei...”
Yaoyorozu stares at him below with red cheeks and sweaty forehead. Her uniform is now crumpled and messy, a few spots of sweat can be seen on thinner parts. She’s breathing hard and is probably the most erotic thing Aizawa has ever seen for months.
It’s going to drive him man. The chanting in his head resumes. To move, fuck, take it.
Take her.
And suddenly it feels like he’s not the one controlling his body anymore as he pulls out only to thrust back in with so much force that it makes Yaoyorozu slide up on the floor. It feels like he’s deep inside his mind, just watching as his body moves to its own accord.
“Is this what you want, Vice Class Representative?” Aizawa leans in close to her ear, thrusts unfaltering and even. “To be fucked like a whore by your teacher?”
Each thrust forces Yaoyorozu’s breaths out, making her whimper to the ground. “Yes, yes, yes!”
“I should have known.” Aizawa’s tongue darks out and licks a wet stripe at Yaoyorozu’s neck. “You were sure you’ll fail your finals, is that it? You chose this instead of reviewing.”
His movements slow down a bit, but the force is still sending Yaoyorozu to the floor. “Filthy fucking whore.”
Aizawa can feel a similar heat blossom under his skin, only this time, it isn’t as unpleasant as earlier. It’s the type of build-up that he’s sure will explode with pleasure and satisfaction.
Aizawa’s breaths are ragged, animalistic growls ripping out from his throat without him realizing it. “Going to fill you up, you’ll regret this.”
Yaoyorozu's response is moaning, sensual and seductive as she feels a heat coil in her. “I’m so close--”
“Shut up!” Aizawa’s thrusts stutter as his orgasm hits him, the heat underneath his skin bursts into waves of pleasure, cock shooting out ropes after ropes of cum inside Yaoyorozu’s ass. The latter moans out as the feeling of cum inside her sends her over the edge, ass clenching around Aizawa’s cock as she desperately milks him of his cum.
They stay there for a minute, only their pants can be heard in the dead silent room.
“Fuck it.”
It’s all Yaoyorozu hears when suddenly, Aizawa is pulling out and flipping her around to her back. She faces the man of her dreams and screams.
Aizawa positions his still hard cock just outside Yaoyorozu’s slit, tip teasing the hole as lube, wetness, precum, and cum mixes.
“Sensei, n-not there--!”
But Aizawa’s already pushing in, slow but unyielding even when Yaoyorozu tries pushing him off of her. “Please, sensei!”
Tears fill Yaoyorozu’s eyes as Aizawa stretches her center, no matter what she does, he doesn’t stop. Aizawa grows tired of the struggle and pins her hands up above her head as he continues breaching the tight heat.
“Isn’t this what you wanted?” Aizawa groans when his balls touch Yaoyorozu’s skin. He spreads Yaoyorozu’s legs and leans in to press a harsh kiss against her lips. “You’re going to get it, fuck, you’re so tight.”
Aizawa starts thrusting, skin slapping against skin as Yaoyorozu pleads for him to stop. “Sensei, I’m-- please--”
All of it goes unheard though as Aizawa lets the animal raging inside him take over, mind blank as all it processes is pleasure. Every drag he does burns Yaoyorozu’s insides, but he’s not going to stop.
Before Yaoyorozu knows it, Aizawa is filling her up again, hot cum sloshing and painting her. She sobs when Aizawa starts moving again without even pulling out. Each pull of hips drags small drops of cum that spills around his cock.
Yaoyorozu isn’t sure how many times Aizawa has filled her, but he’s still not stopping and her thighs feel strained from their position. She thinks her stomach is starting to swell, but even her eyes aren’t clear anymore with tears and haze.
Aizawa grunts against her neck, which is now littered with bites and blood. She gasps when she feels another surge of cum wash her insides. She can even feel cum dripping from her folds even though Aizawa has her plugged tight.
She definitely got more than what she bargained for.