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"Pervert. Don't lie to me, I saw you staring." Katsuki's harsh voice laced with a teasing malice.
"I'm, I'm sorry Kacchan. I didn't mean to! It was just, just that the other boys were staring too so I wondered what they were looking at and—"
Katsuki rolls his eyes at Izuku's incessant mumbling. "Shut up, pervert! Just because you've presented as an alpha doesn't mean you can stare at any omega you want like they're your property! Especially not me."
Izuku looks down at the omega pinning him to the bathroom stall wall. "I promise, I'm not a pervert, Kacchan." With his recent presentation, he now stands just a few inches above his old childhood friend, who used to always be the bigger one. But when he's looking down his nose at you with the glare of a thousand suns, it's still pretty intense. "Please. I didn't mean to stare at you."
"Useless Deku. Thinking he can get whatever he wants now that he's an alpha…" He backs up a small step, pointing to the ground, "On your knees."
Even with his confusion, Izuku follows orders, getting down on his knees and still keeping himself as close to the stall door behind him as possible.
Katsuki takes a small step forward, pushing himself against the alpha again, now Izuku's face being right above his crotch. His nose pokes into the indent of his lower abdomen. Izuku nervously looks Katsuki in the eye, also trying to get his gaze away from the temptation in front of him. He can feel his fangs wanting to sink into skin, his hands wanting to grab at the blonde's small waist, and his tongue or fingers dip into the pussy right up against him.
"I bet you like this, filthy knothead. First, ogling at a young omega's chest; second, smelling his scent straight from the glands." He grabs Izuku's chin and pulls him up, straightening him so he's no longer sitting on the back of his heels. "What is it that you want? To fuck me? Just pump and dump like the rest of those measly losers? Hugh, Deku?!"
Izuku shakes his head no, his eyes starting to water and his head fogging over. "Never, Kacchan! I would never use my Kacchan like that. You smell like peppered caramel with a little bit of vanilla, you don't understand what your scent does to me. I would never make love to you and leave you. That's why, that's why I didn't like, didn't like the other students staring. They would never appreciate you the way I could. They don't know you the way I, I do! I want Kacchan to be treated fairly, not like a bad omega, cause you're a good omega. When you took your shirt off outside at the end of PE, it was just hard for people to hold back looking at you—I can't blame them, you look perfect—but they were making disgusting comments about you and I couldn't take it."
Katsuki looks down at him, waiting for him to continue. But instead decides to lean the conversation, "Comments like what? Repeat them."
Izuku lets out a growl. He doesn't want to have to keep thinking about those jerks. But fine, orders are orders. "They wanted to see you when you get pregnant, talking about drinking your milk and seeing you all bloated from a baby. Just from seeing you shirtless and they want to impregnate you." Izuku's breathing starts to speed up, "They said they wondered if your attitude would go away if you got put in your place." His pupils look small, and he's zoning out just a little.
"And so you attack them? Who are you to decide that I need saving? You're just a worthless Deku, you don't own me."
He knows Katsuki's doing it on purpose, saying things to get him riled up. He bares his fangs and his hands come up to grab the omega's hips with the nails starting to press in. "Neither do they. Those pricks can go ogle a different omega, not you. I just scratched them a few times, nothing serious, Kacchan."
He clicks his tongue and rolls his eyes, then running his thumb over Izuku's lips. When the alpha relaxes his jaw, Katsuki takes that as an opportunity to shove his thumb in. Holding his head back against the door with his thumb in his mouth makes Katsuki go crazy. He's right where he wants him.
"My Kacchan this, my Kacchan that. You really do think you own me, don't you, pervert?" He rubs his thumb in circles over Izuku's wet tongue. "Bet you want to impregnate me just like them. Wanna drink my milk. Too bad, your weak sperm would never be able to get their hands on my eggs." Izuku's hands grip his hips tighter. "Useless alpha. A waste of an alpha."
He opens his eyes and they make contact. Izuku can smell Katsuki's arousal leaking from his shorts. He glances down for one moment, one tiny moment, to get a glimpse. But of course, Katsuki catches it.
"What? You smell me? Your alpha instincts paying attention to my slick?" He laughs at his own next sentence, "What if I told you I'm wet from our classmates, would that make you jealous?"
He knows he's lying and yet it still pisses him off. "Kacchan." He tries to say around the digit in his mouth.
With his free hand, he unties his gym shorts, then maneuvers them down to drop at his ankles, showing his panties off to Izuku. He finally takes his hand away.
Panties?
Izuku's hands go straight down to palm his own crotch as he lets out a rough moan. "Kacchan. You're, why are you wearing girls panties?" He puts his forehead back against Katsuki's lower stomach, his nose brushing against the tip of the red lace.
Dark red, soft, thin lace panties.
Katsuki pulls the straps up so they're sitting on his hips the proper way, letting them snap back against this skin. He'd had them horizontal across his hips before, hiding them underneath his pants. Izuku notices the dark patch from the omega's slick and takes a deep breath, both to control himself and to get that scent memorized.
"You like them? You're drooling, pervert." He pushes his hips forward into Izuku's face and wiggles them, "Come on. I know you want to."
He speaks mindlessly. "If you aren't mine, why are you wearing my favorite color?" He whispers mostly to himself.
"If I'm yours, why aren't you taking charge and making your omega feel good? Like a proper alpha would." Katsuki responds.
That triggers something in his brain. Kacchan acknowledges it. He's mine. His pleading eyes get replaced with a look of determination. His hands go to his hips again and he squeezes, nails scraping, almost tearing through the fabric. He pulls Katsuki impossibly closer by his ass, making Katsuki have to spread his legs around Izuku's and stable himself with his hands in Izuku's hair.
Letting his tongue escape his mouth, he tastes the slick now almost dripping from between the omega's legs. His breathing is shaky. His hands are clammy. It's been months. He slides the panties down, Katuski's underdeveloped cock popping out, and licks it while making eye contact with the blonde.
Katuski's face is slightly flushed, his lips pressed into a line, and his eyebrows furrowed. "What're you waiting for?" He mutters.
Izuku picks up Katuski's left leg to put over his shoulder, scooches under him and tilts his head back. His arms go under and wrap around his legs to hold him still. With his eyes closed, he starts slow, just how Katuski likes it. Creating a layer of his spit covering every little part of the omega's pussy, another bout of slick leaks out right on his tongue, making him groan with arousal.
The floor under him is cold and probably disgusting when looked at through a microscope, but there's more important matters to deal with right now. He needs to make his omega feel good.
About 3 years ago, Katuski presented as an omega. His irritability, social issues, and public awareness all increased. Making him consistently stressed out. Even more than before. It took him a while to get used to it, now being more at ease with it than he was for the first year.
And 10 months ago, Izuku presented as an alpha. He had a small growth spurt, gained a little more confidence, and people didn't automatically assume he was super weak anymore.
But a certain omega took a liking to him after that. Katuski's bullying became relentless, occurring almost everyday. Mostly about him being a late bloomer, or his newfound scent smelling bad and rudely filling up a room, or about being too scrawny to be a real alpha. Izuku assumed that his alpha traits truly did just piss him off, nothing else. It wasn't until lunch one day when a female alpha told him why none of the other omega's ever spoke to him much:
"Bakugou's really got a claim on you. I bet it was surprising to see a drastic switch up like his." She sat backwards in her chair, writing down some notes while eating on Izuku's desk, both looking over at Katuski eating for a moment.
He looked at her, confused. Then back to Katuski. Then back to her. "What do you mean? Claim? Switch up?"
She turned her head back to him, "Yeah, I mean you can't tell me you haven't noticed, Deku. Most of the omega's don't want to be in group stuff with you anymore because of him. He's always around you, leaving traces of his scent on you. Socially, you're his, even without a mark." She explained.
He blushed a little and slid down in his seat, shoving another bite of food in his mouth. "No way." He mumbled.
"Come on, hottest omega in 3-A and none of the alpha's have tried going for him in the past 3 months? It's because he picked you. I personally don't understand why he does it by picking on you but it's probably a dominance thing. He's one of those reject omegas, I'd tell him to back off if it were me. Then you'd have a chance with a better omega." She didn't understand the weight of her words as well as Izuku clearly did.
Izuku immediately felt offended. Protective. "He is not a reject! He's just short tempered, that's who he is." He defended, "Either of us would be lucky to have an omega like him. There's more to him than you realize."
She gave Katuski one last glance over her shoulder and rolled her eyes while shrugging. "He's all your then." And she kept eating.
It was about 3 weeks after that conversation when he brought it up to Katuski himself. He was on the way home when he noticed Katuski looking at a flower stand run by a small family in the neighborhood just a couple blocks down the road from him. Without thinking, he took off down the street to go talk to him.
"…ume like these are gonna be blooming soon, so if you want some for your home I'd suggest taking some within the next week." The lady running the stand explained to him. "They're a good gift fo— OH!"
Izuku stopped right next to Katuski and startled the woman. "Kacchan! We need to talk, is now okay?" He looked up at him, lent over on his knees, already winded from the speed he forced himself to go to get there.
Katuski glared down at him. "Does it look like now is a good time?"
He looked back and fourth to the woman, bowing and then standing up straight, "I'm sorry for the interruption. Please excuse us, ma'am."
Izuku grabbed Katuski's hand and pulled him down the road, a risky move. He only managed to get him a couple feet before he yanked his hand back, "What the fuck? Asshole! Are you asking to get your ass beat!?" He slapped him on the back but kept walking next to him.
Izuku looked back and bows his head at the woman again as she stared at them in confusion.
Then turning his attention to Katuski again, "Sorry Kacchan, it's kind of urgent." He whisper yelled.
Katuski scowled. "Spit it out, nerd."
"Well, apparently some of our classmates are under the impression you've… claimed me. Like socially. And that's why the omega's in the class don't care to talk to me." He tried reciting the words his classmate told him prior.
But Katuski just barked out a laugh. "Yeah right. The reason omega's don't talk to you is because you're a useless alpha. Omega's like them don't like alpha's like you. Now fuck off."
He did no such thing. "Omega's like them? Not you?"
"Don't go puttin' words in my mouth!" He yelled, pointing a finger at him as they walked.
"Kacchan. Be honest. Does it intrigue you that I'm an alpha?"
Katuski looked him up and down with a side-eye. He shoved his hands in his pockets. "You stink up the place. It pisses me off."
Izuku stopped as they're about to turn a corner. "That doesn't answer my question. And I've never been told that by anyone else, maybe you like how I smell and can't stop paying attention to it." He offered.
Katuski scoffed, continuing to walk. "Whatever you say."
Izuku caught back up and walked at the blonde's pace, "That's not a no." He stared at Katuski next to him with his insufferable puppy eyes. He refused to meet Izuku's gaze. They walked almost a whole other two blocks before Izuku tried again, "Kacchan—"
Katuski stopped and turned to growl at him, "What!?" He yelled.
He put his hands up out of reflex, then took a quick deep breath. "It's okay… If you want me. I'm yours, I trust you, I've always been yours. Even before we knew I was an alpha." Katsuki looked down at the ground. "I wouldn't want you to be with any of those other alpha's anyways, none of them understand how perfect you are. People say omega's shouldn't be aggressive or snarky but that's what I like most about you. You never let your gender change you." He tried to speak softly, putting his heart out there for Katsuki to take.
But it got ripped from him.
Katsuki glared at him, his head still tilted down, and he gave him a sickening grin. "You're an idiot, you know that, Deku? I've claimed you because I pity you. You're too nice for your own good, and you follow me around like a lost pup. I claimed you so people know only I'm allowed to mess with you. I'm actively ruining your chance of getting a proper omega. I'm doing it for my own entertainment."
The alpha looked at him a little defeated, hoping that his proposal would've gone better. Katuski left him there. Frozen in his own shock, he got home late that night.
Katuski's bullying took a turn after that. Starting to become even more physical. One day, he cornered him in an alley in the city on the weekend when they bumped into each other. Izuku spent the next almost full hour getting scented and bitten—everywhere but his scent glands—and groped by the omega. It was harsh, but Izuku loved every second of it. Seeing Katuski take an extra moment of observation to inspect Izuku's cock made him go wild. Nothing more than touching happened that day. But over the next month from that things quickly got more and more sexual. Before school, teasing during class, between class, after school, weekends, whatever time Katuski wanted it.
A few months ago, Katuski called a break, saying he wasn't gonna bother with him for however long he decided.
Until now.
The blonde's sweet slick coated the alpha's mouth. Making the both of them moan. The slow pace of tasting between his folds and sometimes sucking on his cock didn't last as long as it usually would. Katuski quickly speeds up the tempo, taking the initiative to rub himself all over Izuku's face. He started to suck as well as lick, taking his clit in his mouth and creating a suction on it, only to then abuse it with his tongue. It's always been hard to keep up with Katuski's constant moving hips, but he's learned well.
He imagined what his Kacchan's face probably looks like right now, struggling to hold himself up by Izuku's hair and one foot on the ground, leaving him nothing to cover his face with. And nothing to shelter his moans. "Deku~ Aaahhhh, right there!" With his mouth slung open and eyes starting to go unfocused.
"Good— baby—" He tries to speak between his breaths for air, "That's it. Let it out—"
Katuski lets out an almost laugh of a moan before the noise goes high pitch and the hands in his hair impossibly tighten. More slick drips out from between his legs, giving Izuku a sign that he must be cumming. He doesn't let the omega get up until he's finished cumming. Even then Katuski has to rip himself off to get Izuku to let go.
His feet both plant into the floor and he almost stumbles backwards. Before Izuku can ask if he needs any help, Katuski's next demand comes into play. "Take your pants off." His face is red and sweat already drips down his temple.
As the alpha goes to unbutton his pants, Katuski pulls his shorts and panties off all the way. Izuku stands up and the gym shorts fall down to his ankles. Katuski stands in front of him in his shoes and a shirt that's just long enough to cover his cock. Izuku takes his shirt off though, not wanting to get it any dirtier, and tosses it to hang over the stall wall.
Katsuki grins at him and licks a stripe up the alpha's neck.
"Let's put that cock to use for once." He whispers. "I've been thinking. How better than to claim you by taking your useless nerd virginity? Your perverted alpha brain probably only cares about sex and pups anyways, just like those other alpha knotheads."
"But, what about… condoms or something? Are you on birth control, Kacchan?"
"Is that a big deal? What, don't want to become a daddy at 15, Deku? Don't want to make me a mommy?" He teases, seeing how hard it's making Izuku, he keeps going, "Does that make your alpha hot and bothered? Do you get off on the idea of making me a mommy? You're so disgusting. A typical alpha, wanting nothing but to impregnate the first omega they find. And just for that, I'm not gonna tell you, I'm gonna make you worry for months that you've got pups in my belly waiting for you. Go on, call me mommy." A sinister grin grows on his face as he waits for Izuku to answer.
Izuku whimpers. "M-Mommy." He chokes out.
"Exactly~ Say it again."
"Mommy." Izuku melts and rests his forehead down on Katuski's, "I'll make love to you, I'll make you feel good. I promise. I'll make you a happy mommy." He grabs the omega's hips and rubs their cocks together.
"Yeah, yeah, just fuck me, nerd."
Izuku leans down and picks Katuski up so his legs are straddling his hips, then turning them around so Katuski's the one with his back against the wall as he's mumbling something about the omega's vulgar mouth. He holds himself up by wrapping his arms around the alpha's shoulders. Izuku pushes him against the wall and holds him up with one hand and his body, using the other hand to line himself up to the omega's slick hole.
It doesn't take him long to get himself halfway in, but that's where it stops. It doesn't want to go any further than around three inches and he decides to pull out. Using his fingers instead, the sweet slick allows him to wiggle all the way to the last knuckle, he curls them forward and entices moans from Katuski's throat. He's used his fingers on him before, it was one of Katuski's favorite things they did, he'd often use his fingers on his cunt while he uses his mouth to suck on his cock.
When he can't take it any longer, the omega squirms in the alpha's arms to get his attention. "Get inside me, now."
So without wasting any more time he slides himself back in again. It's so warm and wet, once he gets all the way down to the base he lets his head fall back in satisfaction. He pauses, letting them both have a minute to settle… more so for himself so he doesn't cum on the spot.
"Ohhh, that's good… I always knew your pussy would feel perfect. It tastes perfect, it looks perfect, of course it would feel perfect too. Oh thank you for letting me show you I'm a good alpha, I'll be the best alpha, I'll give you all the pups you could ever want. You're such a perfect omega. All for me. My puppy momma." Izuku's motormouth makes Katuski's heart race and his mind go blank, and it only gets worse when Izuku starts to move in and out. "Sweet, gorgeous, handsome, omega. I'll be your alpha forever. I'll wait for as long as you want to mark me properly. As long as everyone knows you're mine and I'm yours, I don't care how long I have to wait." He speeds up, starting to make Katuski bounce on it. "How many pups you want, Kacchan? One? Three? Even more? Whenever you want pups, just come to me and I'll give you as many as you want, mommy. I wouldn't want pups with anyone else."
Katuski's practically screaming now at how hard Izuku's going. He's hardly even listening to the words coming out of the alpha's mouth. Still sensitive from getting ate out, it only takes him a few minutes of the good pounding to get him close to cumming. "FUCK! Shut up, nerd! I'm cumming!"
Izuku makes sure to keep going at the same pace, hitting the same spot, going just as deep as to not ruin the blonde's orgasm. "I'm gonna cum, too. I need to cum, mommy."
Katuski starts to squeeze down on the cock inside him, an ear bursting scream ripping out of his throat, then tilting his head down to bite on Izuku's bare shoulder as Izuku rides out his own orgasm inside the omega's dripping cunt. From the different fluids flowing between them, it makes a pain to have to clean up. Izuku places Katsuki down on the toilet, using some of the paper towels to wipe off what hasn't yet dried on his skin yet. While the omega's trying to recover and get back into a good enough headspace to walk out of the restroom, Izuku puts his clothes back on and rinses the sweat off his face.
Then helping Katsuki get dressed. He carefully slides the dirty panties up his legs, then putting his gym shorts back on him.
"Deku." Katuski mutters, grabbing Izuku's attention.
He kneels down in front of him. "Yes, Kacchan?"
"You're a fuckin' meathead." He grins at him, looking down his nose.
Deku chuckles at him before reaching forward to help him stand up.
"Hey! Watch were your going!" Katuski yells, jumping out of the way of three giggling pups running under his feet. He almost drops the large laundry hamper when one of the older three kids rushes over to help stabilize him. He gives them a silent thank you and heads to the laundry room, meeting Izuku who's in there folding the clean stuff.
"Got enough of your little army back there?" Katuski jokes.
Izuku smiles at him and places a kiss on his head. "Nope," he pops the P, "Never, my sweet mamma."
Katuski fake groans and sets the hamper on top of the washing machine. "Then, maybe when our parents come to watch them in a few weeks, we could… try for number seven?" Katuski says playfully.
Izuku picks him up and spins him around before planting him back down and dipping him into a deep kiss. "Whatever my omega wants."
A crash is heard from the living room.
"MOOOMMMMM!" Five different voices scream. And Izuku gives him one last kiss before letting him leave the room.