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“But I don’t want to!” Katsuki whines as his mother drags him away from his video game.
“Too fucking bad, you damn brat! That’s my responsibility as the pack alpha and it’ll be yours too someday!” Mitsuki yells back to him, utterly unaffected by the ferocious snarls coming from the young pup.
He knows that being the alpha of their pack comes with duties and shit, but he just got to the boss on that game! Why can’t the hag do this on her own for once?!
“But I was busy!”
“Really, brat, it’s not every day we get newcomers to the pack. That’s why we need to properly welcome them when they do decide to join us. And Inko has been my friend for years, I’ll not have you disrespecting her!”
In all his six years of life, Katsuki has never seen their pack receive anyone new, so he knows this is very unusual. Packs are close-knit groups of werewolves who live in community throughout their whole lives. Hell, Katsuki has to call the extras in his pack aunty and uncle, and his mother is always telling him to play with the other stupid kids. But he does all that because one day he’ll be pack alpha in his mother’s place.
So the young boy goes, huffing and puffing, behind his mother to the smallest house in their pack’s neighborhood.
A plump lady opens the door and she and his mother hug and talk happily. Katsuki has no patience for that, so he passes through them to check out the house that’s been closed for years.
When he enters the living room, he sees the prettiest boy he’s ever seen. He’s slightly shorter; his hair looks softer than Mina’s dolls; his squishy cheeks are adorned with stars; his eyes look like the stones from the hag’s favorite pair of earrings; his wolf ears are out, giving him a curious expression, and his fluffy tail is wagging happily on his back.
He barely looks real, it’s like someone drew a cute boy and some fairy made him come alive.
“Katsuki, this is Izuku,” the plump lady says, taking him out of his musings.
“Go say hi, brat. This is your new friend,” his mother says, tapping him on the shoulder.
But the boy looks so cute that it’s making Bakugou feel weird inside. He doesn’t know why it bothers him, but he hates it. So, instead of the nice greetings the old ladies are waiting for, what comes out of the young werewolf’s mouth is “he looks dumb, I don’t want to be friends”.
The pretty boy’s eyes instantly fill with tears and he pouts cutely.
“You damn brat! Don’t be rude!” Mitsuki yells at him.
“He’s the one who can’t control his ears and tail! He’s dumb!”
After that, it’s complete chaos. Izuku cries, Inko tries calming him down, Mitsuki yells at Katsuki, Katsuki yells back because he really doesn’t know how to deal with all the feelings Izuku’s crying is giving him.
It was a traumatic first meeting and, during the following years, things didn’t get much better.
***
Turns out Izuku and Inko had come to their pack because Izuku’s father left them. Mitsuki and Masaru said that only meant it was their responsibility as the leaders of the pack to take care of the two newcomers.
Katsuki has always felt torn about this fact. He knows he should be the one taking care of Izuku, the boy is so small and delicate; but Izuku also gives Bakugou feelings he doesn’t know how to deal with.
That meant making sure Izuku was close, but always knowing that he was beneath Katsuki. Izuku became Deku, Katsuki became a bully and their friends grew up torn between their weird dynamic.
When they were small, Izuku still followed him around, saying how amazing Kacchan was for always managing to run faster, jump higher and be braver than any other kid. But even Deku’s undying devotion couldn’t stand against Katsuki’s ongoing torment.
In middle school, their pack got divided into smaller cliques. Katsuki led Kirishima, Mina, Kaminari and Sero, while Izuku got closer to Uraraka and Asui. Bakugou liked this division because it meant Izuku was safe, but not so close to him.
However, in high school things got more complicated. The small school near their neighborhood didn’t have a high school level, so all the kids on the pack had to attend a bigger school in the nearest city. And, in that school, besides more human teens, there were wolves from another pack.
Shitty damn Deku instantly became friends with Todoroki and Iida, no matter how furious Katsuki got. He made sure to show his anger over that fact to Izuku. Bakugou couldn’t accept his packmate fraternizing with two wolves from another pack — not only that, Todoroki’s father was that pack’s alpha! The fucking half and half was clearly trying to steal Deku away from him!
But Deku had already learned to not heed to Katsuki’s complains and kept being friends with anyone he wanted. Their weird relationship got even more strained after that to the point that, during the full moon nights, Izuku, Ochako and Tsuyu didn’t run with the rest of the young wolves of the pack anymore. The three small wolves ran on their own in their territory, keeping away from their volatile future-alpha.
During the first and second year of high school other significant changes came to their pack — the young wolves began presenting their secondary genders. Most of them presented as betas as was expected; Katsuki was one of the first to present and his alpha status was never in doubt; one surprise was Mina presenting as an alpha too, but she made it clear she had no desire to challenge Katsuki for the position of the pack’s alpha.
Todoroki presented as an alpha, which didn’t help at all with his and Katsuki’s relationship. The rest of half n’ half’s pack wasn’t important enough for Bakugou to even care how they presented.
However, there was still one thing bringing unrest to Katsuki — Izuku hadn’t presented yet.
As they reached their third year in high school, Deku is still the only unpresented wolf among their generation. Nobody seems to care much about that, they say he’s just a late bloomer and will probably present as a beta since he’s a boy.
Still, that doesn’t sit right with Katsuki and he keeps an eye on Deku all the time (just because his mother said it was Bakugou’s responsibility to take care of him, nothing fucking more, ok?). He’s always closely watching Deku and that’s why he sees there’s something wrong with the boy the moment Izuku shows up on the train station that morning.
The whole group of the pack’s teens takes the train to the city together every morning for school. It’s a regular occurrence for Deku to be late, he’s always staying up until the wee hours of the morning geeking out about one thing or another. But he always arrives lively, running and apologizing for his tardiness and today he came tired and sluggish.
Izuku’s face is red and Uraraka asks if he has a fever, putting her hand on his forehead with worry. They’re all fucking idiots, all it takes is one whiff of Deku’s scent for Katsuki to know what’s happening.
“Maybe you should go back to bed, Deku-kun. You really don’t look good.”
“I’m fine, Ochako! I can go take medicine in the infirmary at school, but I can’t miss class,” Izuku says with a forced smile.
“You aren’t going to school today, Deku. Go back home now,” Bakugou says gruffly, making the other two teens jump startled.
“I’m fine, Kacchan, and I’ll go to school.”
“No, you fucking won’t,” Katsuki snarls. “That’s a fucking order.”
“You can’t order that to me!” Izuku protests annoyed.
“Hell yeah I can, I’m the alpha of this pack and I’m telling you to go home!”
“You aren’t the alpha yet! Your mom is! And she would never forbid me from studying!” Izuku complains loudly to break through the sound of their train stopping at the station.
As soon as the doors of the train open, Izuku turns to enter and Katsuki grabs him by the wrist.
“NO!” The alpha yells and pulls the boy away from the train.
“Bro? What’s wrong?” Kirishima asks confused already inside the train.
“Explodey, chill. Let him go to class,” Mina pleads.
“Fuck you all! You idiots go to school, I’ll take Deku home,” Katsuki barks at them, dragging Izuku away from the platform.
Deku yells, complains and struggles every step of the way, making Bakugou work hard to drag him away from the train station. Katsuki is much taller and twice nos size, but Izuku isn’t making it easy for him.
“What the hell is wrong with you, Kacchan?! Let me go! Now! I have a paper to turn in!”
“You’re going home,” Katsuki snarls.
Deku’s screaming is calling attention from passersby and Katsuki has to pull him off the streets to the woods to not get in trouble. He doesn’t need his mother finding out that’s how he dealt with a sensible situation.
“Stop it, Kacchan! Stop this right now! You don’t have the right! I can-” Izuku’s protests are interrupted by Katsuki slamming him on a big tree.
“CAN YOU QUIT IT, DIPSHIT?” Katsuki yells frustrated.
Izuku’s scent is driving him crazy, there’s nothing he wants to do more than make the little shit submit to him and Deku putting up a fight is making his inner alpha furious.
“DO YOU WANT ME TO LET YOU GO TO SCHOOL SMELLING LIKE THIS? DO YOU WANT FUCKING TODOROKI TO KNOW?”
“What-? Todoroki? Know what?” Izuku asks confused.
Katsuki sighs deeply in frustration — trust shitty Deku to not realize he’s presenting. However, when the alpha took a breath to control his anger, Izuku’s inebriating scent filled his lungs and the alpha can’t help but lean his face towards the boy’s neck.
“Kacchan? What are you doing?” Deku’s voice is wavering and unsure.
“You’re presenting, idiot,” Katsuki whispers as he lets the tip of his nose touch the boy’s neck.
“Am I? Ahn- Yeah, I supposed it is past the time, I’m already seventeen. Most of our friends presented at fifteen. Except Denki, he presented at sixteen. I was due this happening anyway. I don’t remember any of them saying anything about a fever, though. Maybe it’s because I’m late? Do you think I should see a doctor? Kacchan? What- What are you doing?”
Bakugou completely fazed out Deku’s mumbling, too caught up in the most delectable scent he’s ever smelled. It’s sweet, but fresh; impossible to ignore, it commands every drop of Katsuki’s attention. He wants to devour him, but, for now, he settles for having just a taste, so the alpha licks a fat stripe of Izuku’s neck.
“Yeep!” The boy cries, jumping startled, which brings Katsuki back from his foggy mind. “Kacchan! You licked me! What are you doing? What is wrong?”
“You’re presenting, Deku,” he grunts. “I already told you that.”
“But none of th-”
“None of the others presented as an omega.” Katsuki interrupts him.
“Wha- Tha- That can’t be!” Izuku says in denial. “I’m a boy!”
“It’s pretty rare. Omegas are rare in general, that’s why we don’t have any in our pack. A male omega is a once in a century kind of thing. But here you are, and there’s no denying your scent.” Katsuki says, taking a step back, but still holding Izuku by his arms; his inner alpha refuses to release the feisty omega.
“W-well… Alright. Thanks for telling me, Kacchan. I’ll be sure to go straight home as soon as I give my paper to the professor,” Izuku says a little bit confounded as he tries to get back to the train station.
Katsuki snarls from deep inside his chest and slams Izuku back against the tree, crowding the boy again.
“THE FUCK YOU ARE!” He yells furious. “Is that what you want? You want fucking Todoroki to claim you? To take you away?”
“What?! Kacchan! I just need to turn in my homework!”
“Do you, Deku? Because you’ve been wagging your tail around fucking Half n’ Half for fucking ages. Maybe you think that’s what will take for him to take you to his pack!” Bakugou says with venom on his words.
Izuku’s scent sours immediately and Katsuki is pushed away violently.
“Fuck you, Kacchan! Shouto is my friend! And he knows I never considered changing packs!” Izuku yells at him. “But you know what? Maybe I should! I’m tired of being hated by my future alpha! Why do you complain so much about me going away when you never wanted me around in the first place?!”
Tears are running down Izuku’s eyes, the pain runs deep in the omega and, at that moment, Katsuki regrets everything he’s ever done to the other boy. He knew what he was doing was wrong, Bakugou knew he shouldn’t punish Deku because he wasn’t able to deal with his own feelings.
But what could he do? Katsuki was too young when he fell in love with the boy and he didn’t realize what was happening. When he finally came to terms with his feelings, Izuku was already spending all the time he could away from the alpha.
Katsuki made too many mistakes and he’ll have to pay for them — but, right now, his priority is to make sure Deku is safe.
“I- I don’t hate you, I never did. Shit’s just screwed up and I get why you’d want to leave the pack,” Katsuki says shaking his head and looking to the floor. “I totally get it, I’m a shitty alpha and you deserve better. But you’re presenting and you’ll go into heat in a few hours, so let me just walk you home and I’ll not bother you again.”
“You don’t hate me?” Izuku says with a small hopeful voice.
Katsuki looks up to glittery green eyes filled with tears and feels every wall and lie he ever built crumble.
“Of course not. I just- I just couldn’t deal with how beautiful you are,” the weight of his words make Bakugou turn away from the boy to the infinite green of the trees that surround them. Beautiful shades of green like the emerald eyes that he’s obsessed with since he was five. “I have a stupid crush and I ended up pushing you away to not deal with all these disgusting feelings.”
“Kacchan…” Izuku calls for him softly, but Katsuki isn’t brave enough to look at the boy after this shitty confession he just gave.
What he wasn’t expecting was to feel the weight of Izuku’s body hugging his midsection from behind.
“I like Kacchan too,” Izuku says with a strained voice. “Always have, even when Kacchan sent me away.”
“Deku,” Katsuki turns to face him and sees the shorter boy with his cute black ears peeking through the fluffy curls.
Izuku has always had issues controlling his ears and tail to keep them hidden; when his emotions are running high it’s even harder for him. Katsuki used to berate him for being like a pup on exam days and during sports competitions; but, secretly, the alpha has always thought Deku with his wolf characteristics out is the cutest thing in the whole world.
Bakugou’s hand instinctively goes up to touch the adorable twitchy ears. He has always dreamed of playing with them and now Izuku is acting like he’s allowed! The boy said he likes Katsuki back even after all the years of torment, Bakugou couldn’t be happier or more dumbfounded.
He buries his fingers in Deku’s soft curls and rubs his thumb over the inner shell of the furry ear. Izuku instantly closes his eyes and leans his head towards Katsuki. The alpha keeps scratching and rubbing the black fur of the wolf’s ear until he hears Izuku moaning softly at the feeling.
“Shit,” Katsuki says breathlessly before pulling Deku’s head close to kiss him deeply.
The moment Bakugou’s tongue tastes Izuku, he’s instantly addicted. It’s the most delicious thing he’s ever experienced. He grunts against the boy’s lips and pulls Deku closer with his other arm (his first hand hasn’t stopped rubbing the boy’s ear). Izuku hugs him back and licks Katsuki’s tongue, tasting the alpha as much as the alpha is tasting him.
Katsuki’s alpha is the one in control now. He pushes Izuku back against the tree and presses their bodies together taking in all the heat and scent of the omega that he can. When he notices it, they’re already rutting against each other through their clothes. Izuku is flushed and panting, their scents soar through the woods.
“Kacchan!” Izuku cries as Katsuki’s lips trail down and suck roughly on his neck.
Again that takes Katsuki off his dazed state.
“Shit! Fuck- I-! I need to get you home! Your heat-” Katsuki says struggling to focus through the omega’s scent.
“Kacchan, please,” Izuku says, looking feverish. “Please don’t leave me, don’t push me away. My alpha… It was so hard to think you hated me…”
Katsuki gives a quick and rough peck on Izuku’s lips. “I won’t! I’ll never send you away! But it’s your first heat and-”
“Kacchan, my alpha,” Izuku whimpers, pulling him closer. “Please, stay with me.”
The omega even flattens his ears against his head pleading and Katsuki growls in appreciation. Even his tail swings from side to side slowly to show how pleased he is.
Shit, his tail? That’s when Katsuki notices his emotions must be running high too because his tail and ears are out, even his fangs are bigger — ready to claim his omega.
Izuku’s scent begins souring again because of his distress and Katsuki’s inner alpha thrashes wildly, fighting to get closer and comfort his omega. Bakugou fought valiantly to keep his control, but that was a lost battle already.
In the blink of an eye, Izuku is laying on the florest’s floor on the brown dead leaves with Katsuki pinning him down.
“I’m gonna show you how much I want my omega.” The alpha snarls and licks over the omega’s neck glands.
“Yes, please!” Izuku says, showing his head in submission.
Bakugou can feel the heat of the omega’s straining erection against their uniform slacks. His omega needs him and Katsuki will never let his omega wanting for nothing. He’ll be the best alpha and take care of his mate.
With that thought in mind, the werewolf fumbles to open Deku’s pants until the omega’s dick springs free. It’s so hard and hot, there’s even a delicious little bead of pre-cum on the tip. Katsuki slides down until he can pull Izuku’s pants away and then he shoves his nose on the junction of Deku’s balls with his thighs. The smell there is even stronger, muskier and makes Katsuki even crazier.
His mind is in a complete daze when he begins licking and sucking every piece of skin he can reach — balls, dick, taint, asshole. He devours Izuku whole and raw, and it’s even better than the forbidden daydreams he allowed himself to have from time to time. It’s perfect and he loves it, Katsuki even loves having to push Izuku’s tail away when the boy tries to cover himself in embarrassment.
When he pushes the tail away, freeing Izuku’s hole from the coverage, Bakugou notices the cute little puckered hole is much wetter than it should be from his ministrations. He runs his finger over the rim, curious, and feels that the asshole is covered in some clear and slippery liquid — Deku’s slicking.
The alpha heard about it, but to actually see an omega slick up, getting ready to take his alpha’s cock is the hottest thing Katsuki has ever seen. He inserts one finger in and watches hypnotized as the little hole easily takes it in. Izuku moans, his greedy hole sucking Katsuki’s finger in.
The second digit enters just as easily. Deku’s body opens up beautifully to take his alpha, Katsuki is enthralled by the sight.
“Ka-Kacchan!” Izuku moans. “Please, need you. Need you so much.”
“Shh… Relax, love,” Katsuki coos at him. “I’m here.”
“Nee-ngh- Need you to- to-” Izuku struggles with his words as Bakugou presses deeply into him, touching his sweet spot.
“Need me to what, baby? I’ll give you everything,” he promises his omega.
“Fu-fuck me! Fuck me, Ka-Kacchan!”
Katsuki kisses Izuku’s trembling thighs, “are you sure? It’s your first heat, I could just get you off-”
“No!” Izuku interrupts him with tears gathering on the sides of his eyes. “Make me yours, Kacchan! Pl-please!”
“Alright, alright!” Katsuki says, pulling his fingers away and making Izuku whimper. “Greedy little shit,” he teases without any bite.
His pants are pulled down to his ankles in record time and the alpha lines himself with the omega’s blinking hole.
“Kacchan,” Izuku cries as he pushes in.
“You’re mine, Deku,” Katsuki grunts, trying to distract himself from the searing heat around his cock that threatens to make him cum embarrassingly quick. “Always have been.”
“I’m- I’m yours!” Izuku agrees with a broken voice. “My alpha!”
“My -uhn- omega,” Katsuki says, sheathing his dick deep into Deku.
Bakugou kisses Izuku deeply as he began thrusting into the boy. He needs to keep his mouth busy, or else the need to bite Deku’s scent glands will be too much to resist.
Izuku is losing control too by the way he’s digging his nails on Katsuki’s back. Their tails found each other between their legs and are twisting around one another; this adds a new layer of pleasure to the whole thing that Bakugou had never expected.
Fucking his omega is the best thing Katsuki has ever done and he’ll not let Deku out of his sight ever again. Fuck what anyone else will think, fuck if they’ll say they’re too young! Izuku is his and Bakugou won’t let anyone get in their way!
“I’m gonna pump you full of my seed,” Katsuki grunts on Deku’s ear. “Make you round with my pups. No one will take you from me!”
“Yes! Please, alpha!” Izuku pleads, hugging Bakugou even tighter with his legs.
“You want that, omega? Want me to breed you?” He bites Izuku’s ear and hears the boy cry prettily for him.
“Yes! Yes!”
Both boys are completely gone, lost in the moment, blindly reaching for their releases.
“Ka-a-cchan! Close! So close!”
Bakugou also can feel he’s close by the way his knot is catching on Deku’s rim. So he wraps his hand on Izuku’s cock and starts to jerk him off, “cum for me. Cum for me, love”.
Izuku’s orgasm comes on command. The smaller boy convulses under him, tipping Katsuki over the edge. The alpha’s knot inflates, sealing them together and he fills Izuku’s insides with cum.
The alpha actually blacks out for a few seconds after his intense orgasm. When his vision returns Katsuki sees he’s smushing a dazed-looking Deku. He hugs the boy and rolls until Izuku’s smaller body is on top of him. Katsuki’s alpha demands that he pet and kiss his mate to show his omega how perfect he is and how pleased the alpha is with him.
“Hey,” Izuku says softly when he comes back from his headspace.
“Hey,” Katsuki answers with a still wrecked voice. “You good?”
“Yeah…” Izuku wiggles on top of him and frowns. “Why can’t I move?”
“I knotted you,” the alpha answers smugly.
Izuku’s looks at him surprised, “what? But we-?”
Katsuki nuzzles the boy’s neck to get him to relax, “we’re mates now. I didn’t claim you because we’d never hear the end of it from the old hag if I had, but you’re mine.”
The omega relaxes in his hold and nuzzles him back, “my alpha.”
“As soon as the knot releases, I’m taking you home and asking your mom to be allowed to court you.”
Izuku giggles, “you don’t need to court me, Kacchan. I’m already your omega.”
“We already started this shit screwing up, Deku! Let me do at least something the proper way.” Katsuki snaps annoyed and Izuku giggles again.
“I love you, Kacchan.”
“Love you too, stupid Deku.”