Chapter Text
"I saw it on TV," Katsuki says proudly as he crouches down beside Shouto to attempt to stab the caterpillar crawling along on the ground in front of them, well tries but Shouto blocks his attempt with an outstretched hand, shooting Katsuki a nasty look.
"Mom says not to do everything you see on TV," Hitoshi says in a small voice that Katsuki scoffs at.
He had seen it on TV, it was one of those 'adult-y' TV shows where everyone is half-naked half the time and swearing (which Katsuki very much likes) but he had saw the alpha guy lean into the omegas neck before sinking his alpha teeth into the back of the omegas neck with a whispered mine. They haven't presented yet, presenting a secondary gender comes when they're bigger, closer to their teenage years but that's too far away in Katsuki's opinion, he already knows that Hitoshi, Shouto and Deku are his, so it doesn't make sense to him to have to wait until he's older.
Plus, he already knows what he's going to present as. "Look," Katsuki says while tossing the stick to the ground and pointing at the sharpened teeth in his mouth, an early indication of an alpha, the doctor had said, "I already got my teeth."
"Oh cool!" Deku chimes in breezily, leaning over and poking a chubby finger against the sharpened edge, Katsuki beams under the scrutiny. Even the doctor had looked surprised that he, at the grand age of five, had already got his alpha teeth, but it makes sense, he's going to be the best so of course he'd have a cool quirk and be an alpha. "I wonder what I'm going to be," Deku muses out loud as he crouches down beside Shouto, smiling as he watches the caterpillar successfully latch itself on a leaf on the ground.
"An omega." He already knows that they're going to be omegas because they're going to be his omegas, he doesn't get why no one else is able to see the obvious, but its irritating.
"I could be a beta," Deku huffs out, undeterred, "my dad was a beta."
"Me too," Hitoshi yawns out, glancing back longingly towards the spot underneath the tree he had been trying to nap under but Katsuki likes to keep them all in one place and the tree is too far away from where Shouto was busy inspecting the caterpillar.
"I could be alpha," Shouto says in a small voice.
Katsuki scoffs. "No, I'm the alpha and you're my omegas."
"The teacher says stop saying that." Hitoshi says while rolling his eyes, chubby hand outstretched and reaching to grab Katsuki's hand but stops and grabs his sleeve instead. It's annoying but Katsuki isn't good at controlling his blasts all the time, so he's not allowed to hold hands until he's better at it. "She said to say pack."
"She's stupid," Katsuki grunts because she is. "I saw on TV that alpha's bite their omegas on the back of their neck, so I'm gonna do it to show the stupid teacher you're my omegas."
Shouto's face scrunches up as he glances up to Katsuki, finally, frowning. "Biting hurts."
"Omegas like it," Katsuki says simply because the omega on the TV had been making happy sounds and crying in joy.
Shouto only hums, looking doubtful that he'll like being bitten, but everyone else is kind of stupid so he forgives them for that, omegas don't learn as quickly when they're little is what his mom told him, so as a good alpha he needs to protect them and help them. And he's a great alpha, just like he will be a great hero. He's good at patting Hitoshi's stomach to make him go down during nap time, he's good at making Shouto eat his vegetables even though he doesn't want too, and he's good at protecting Deku from all the things he's scared of, which is a lot.
"When you bit my arm it hurt," Deku says with wide eyes, "does that mean I'm a beta?"
"I'll show you!" Katsuki snarls, his patience in trying to explain calmly why he's going to bite them gone and Deku's eyes well up with glistening tears at being yelled at and he only feels a bit guilty. "Turn around."
Hitoshi lets go of him and moves to crouch down next to Shouto, both of them holding hands as they watch as Katsuki rounds behind Deku and tugs down the collar of Deku's shirt to reveal the smooth expanse of his neck. He licks his neck first because that's what the alpha on the show did and Deku giggles at the feeling before Katsuki properly bites. When he leans back, he wipes away the blood from his mouth, a pleased grin on his face because he was right, Deku didn't say it hurt and he seems to be more confused than anything as he tries to look back at his neck.
"See stupid Deku it didn't hurt."
"It didn't?" Shouto asks suspiciously to Deku, who wide-eyed, nods.
"It didn't hurt at all!" Deku chimes with a wide smile.
"If I let you bite me can I go nap?" Hitoshi asks warily, and Katsuki hums in agreement before rounding behind him, its stickier because he has traces of Deku's blood in his mouth (which tastes gross and coppery) and the TV didn't really show blood, but dad says TV isn't always real so he can't expect it be completely accurate. He bites Hitoshi in the same way, lick first and then bite, he ends up with more blood in his mouth that he has to spit into the ground, but when he's done with that, he moves to Shouto and bites him last.
"Now you're all my omegas," Katsuki says proudly, pleased because he can finally shove it in the face of his stupid parents and teacher's that they're a bunch of idiots.
*
"Oh my god!" The teacher screams in terror when they arrive back inside the building and are all seated in their spots, Katsuki knows he looks bad from all the blood on his mouth (Deku had cried a bit and said he looks scary) but he forgot to wash his mouth. Absentmindedly he picks at the flaking dried blood at the corner of his lips, unbothered gaze flickering up to where his teacher is really looking, the back of Shouto's neck. "Who bit you? Are you okay?"
"Katsuki did," Shouto advises her solemnly as he picks up a crayon and begins idly drawing on the sheet in front of him, "'tis fine, no ouchies."
"Katsuki!" She stomps over to scold him but pauses as she passes by Hitoshi and screams in terror again and Katsuki rolls his eyes at her dramatics. "How many times do I have to tell you they aren't your omegas but your packmates! You don't bite your packmates!"
"They are! The bite didn't hurt!" Katsuki snaps back at her and crosses his arms at her, flaring his nostrils out in defiance, she only seems to go pale at this. "I used my alpha teeth so now they're my omegas."
"Alpha teeth?" She asks in a small, terrified voice, "what do you mean alpha teeth?"
"Kacchan got his alpha teeth early," Deku informs her brightly, reaching over the table to grab a red crayon for his brightly coloured All Might portrait. Katsuki rolls his eyes because Deku only ever draws All Might.
"Oh god, oh no, oh no," she says fumbling forward and crouching down, "Katsuki can I see your teeth?" He rolls his eyes but obeys her and opens up his mouth enough to show off the sharp new alpha teeth, frowning when she sharply inhales. "Ok, ok, your just kids this shouldn't do anything," she's muttering to herself mostly, but Katsuki watches her keenly as she brings a hand to her mouth. "Okay, first let's clean you kids up, okay?"
He isn't pleased when she brings out gross medicine and wipes down the back of their necks with disinfectant that makes Deku cry and even Shouto's eyes water up at the sting, but his mouth is finally free from the gross metallic taste of blood, and they're allowed to go back to colouring after being cleaned up.
They don't get to finish colouring, though, because before they can Katsuki is being pulled aside and his dad is here, frowning at Katsuki in a way that usually only mom does. He doesn't understand why, though, he hasn't even done anything bad today, he didn't even hit that stupid lizard looking kid when he got too close to Hitoshi today.
"So there was a bit of an incident," his teacher says nervously, "Katsuki seems to have bitten three of his classmates on the back of their necks."
"My omegas," Katsuki clarifies for her because she never says it right.
"We've spoken about this Katsuki," his dad says sharply, "why in the world would you bite your classmates?"
"I saw it on TV and she never says it right." He crosses his arms and huffs, falling deeper into his seat. He hates how the adults refuse to agree with him that they're his omegas, because he's the one that protects them from their classmates and makes sure they all eat right, they're his. "If you bite them, they're yours."
"Oh god," his dad bemoans with, pinching carefully at his nose bridge, he turns away from him and addresses the teacher with a tight frown, "do you think it'll be okay? The rest haven't presented, right?"
"I can't imagine it will take but Katsuki needs to understand that he can't just bite omegas because he likes them," the teacher stresses, a small weary sigh leaving her lips as she clasps her hands together on top of the desk.
"No yes we understand we've tried to tell him multiple times he can't just bite his classmates," they did and it's been annoyingly insistent since that time he bit Deku’s arm but he can't help it, he had felt like biting him and when his alpha teeth came in the doctor had even said 'no wonder he wants to bite everyone around him'. "We didn't think he'd try to use his alpha teeth the day after he got them."
"Yes well, Katsuki is thorough..." his teacher says almost mournfully, and Katsuki grins at that. "I think it'd be best to take Katsuki home for today and I'll explain what happened with the other parents."
"Yes, thank you, don't worry we'll lecture him until his ears fall off," his dad bows twice as he stands up, forcing down Katsuki's head into a bow on the third but as he's bundled up and made ready to go, he finally realizes the others aren't going home with him, that they're staying.
That and he spots the annoying lizard near them again and he tries to yank his hand from his dad to stomp into the classroom to tell him off, but he's easily held back, shooting his dad a betrayed look. "I can't go home," he says, kicking up his feet and trying to pull himself away, "I go home last!" He's worked hard to make sure he's the last one to leave, even on the days Hitoshi's parents are too busy to come get him on time Katsuki will wait with him until his parents come, he's the last, he sees them off, not the other way around.
"Katsuki," his dad sighs out, "you've been bad today so we're going home now and we're going to talk about you biting your friends."
"My omegas," Katsuki corrects petulantly.
"Friends," his dad groans, dragging him away from the classroom.
*
The bite marks scab for a couple of days and then heal, but they don't fade, not even a couple weeks later, and Katsuki is beyond thrilled by this even though the adults all regard it with nervous weariness.
He doesn’t really care about the adult’s opinions on him and his omegas, easily ignoring the teacher’s lingering looks of dismay and the tight smile Deku’s mom, Inko, gives every time she picks up Deku. Adults are stupid, though, so he understands that they wouldn’t be able to get that he’s just protecting his omega’s.
Hitoshi wiggles uncomfortably beneath his blankets, frowning up at the ceiling with furrowed eyebrows. Katsuki likes to sleep, he likes nap time. Hitoshi, not so much. It takes Katsuki usually half of naptime just to get Hitoshi to fall asleep for a couple of minutes, and Katsuki knows the moment he takes his eyes off of Hitoshi, he’ll wander off by himself.
Katsuki pauses in his tummy patting, glancing over to where Shouto and Deku are curled up into each other, snoring lightly. He never really cuddles with them the way the three of them like to cuddle, like omegas do, but Hitoshi never really seems inclined to join Shouto or Deku when they cuddle during naptime, always wanting to be on Katsuki’s other side as though using him as a fortress between them and maybe that’s why Hitoshi can never fall asleep.
He curls up into Hitoshi’s side, dragging them both closer to Deku’s back so Katsuki can feel his radiating heat before dragging Hitoshi closer into him, the way his mom holds his dad, Hitoshi looks wary of the hold before just resigning himself into it. At least like this, Katsuki decides, even if Hitoshi tries to move away, he’ll be able to feel it.
He doesn’t need too, though, Hitoshi’s breathing evening out quickly once he’s boxed in by Katsuki’s body, lightly sleeping away, Katsuki soon following after him.
*
“My dad is angry,” Shouto murmurs lowly, idly dragging a stick around in the wet mud from last night’s rain.
“Angry?” Deku repeats, bottom lip already wobbling at the prospect of anyone being angry, and Katsuki wants to roll his eyes at them both.
“Why?” Hitoshi prompts, looking up with wide open eyes.
“That Katsuki bited me.”
“Bit,” Katsuki corrects absently in the same way his mom does to him whenever he says things wrong. Hitoshi is good at talking, so is Deku, but Shouto is a bit slower than the rest of them. He still stumbles over easy words and can’t understand anything too hard. But that’s just because he’s an omega, so Katsuki can’t call him stupid, or he’d be a bad alpha. “Whatever, your dad is lame.”
Shouto frowns at that, bottom lip getting pouty at Katsuki calling his dad lame. Shouto’s dad is lame, because Shouto’s dad is only the number 2 hero, unable to climb to the top with All Might around. One day Katsuki is going to beat Shouto’s dad and show Shouto what a real hero is like, especially when he’s the number 1 hero.
“My mom says Katsuki is no good…” Hitoshi murmurs lowly, idly pressing down the stickers in his book, trying to determine which ones to use. They’re stupid cat stickers that Katsuki had made his dad buy for him last night at the grocery store knowing Hitoshi would like them. Last time he got Shouto Endeavor stickers, and before that Deku got All Might stickers, because good alphas, his mom said, buy their omega’s gifts.
Katsuki just rolls his eyes, because he’s used to Hitoshi’s mom glaring him down with narrowed slits, his hair almost rising up at the ends as his eyes eerily glow red whenever he comes to pick up Hitoshi, Katsuki always dutifully waiting with him. Hitoshi’s mom is scary, but Katsuki isn’t going to be scared away because of Hitoshi’s mom.
“Whatever,” Katsuki murmurs petulantly, kicking himself up. “I’m bored.” As much as he tries to sit around and play with them, Hitoshi and Shouto like to just colour, or play with dolls, or stare absently into space doing nothing, at least with Deku he’ll play heroes and villains with him.
“Katsuki!” the ugly winged guy calls out to him, Katsuki turning around to frown at him because lately the losers of their class have been forgetting that Katsuki doesn’t want them anywhere near his omegas. He’ll have to remind them soon. “Let’s play!”
“Come play!” the other’s echo in agreement behind their little leader.
“Ok!” Deku chirps in excitement, already bouncing up at the prospect of playing, and the leader and his stupid lackey’s frown, glancing to Katsuki, but Katsuki just sneers at them, daring them to challenge him. Of course they don’t, because even if they’re dumb, they’re smart enough to know only Katsuki gets to say yes or no to Deku.
“Fine,” Katsuki grunts reluctantly, glancing back to Shouto and Hitoshi. “Wanna play?”
“No,” Hitoshi says, not even looking up from his stickers. Hitoshi never plays with the others in their class, because the others in their class are scared of Hitoshi’s quirk and they always wanna make him the villain when Katsuki forces them to let Hitoshi play with them, even though Hitoshi hates being the villain.
Shouto, though, has the coolest quirk in the class. Maybe even cooler than Katsuki’s own quirk, even if he won’t admit it out loud. The other kids had been desperate to get Shouto to come play with them at first before finally getting deterred through Shouto’s inability to pay attention for more than a couple of seconds. Shouto doesn’t want to run around playing, Shouto likes to sit around and stare at flowers and count rocks, because he’s lame, just like his dad.
Katsuki shrugs, uncaring, before rushing forward to their lame-quirk classmates, Deku trailing with a wide smile behind.
He glances back at Hitoshi and Shouto with narrowed eyes, he doesn’t really trust them to be alone, their other classmates too keen on bullying Hitoshi at any chance, or wanting to talk to Shouto whenever they can, but he doesn’t want to sit around and look at stickers today.
Today, he wants to blast things.
He grins.
*
He’s put on clothes that smell weird, are weirdly tight, and he looks dumb , but his mom brushes back his hair for the tenth time, scowling at his face like he’s doing something wrong as they stand at the gates of Shouto’s home.
“Little brat,” his mom grumbles irritably, “you just had to bite the little Todoroki kid, didn’t you?”
“My omega.”
“He’s five!” his mom growls back, snapping her own alpha teeth and him and Katsuki huffs, turning his chin up at her. He’s not scared of his mom, even if she’s bigger and stronger, because one day he’s going to be better than her. “He isn’t an omega, he’s a kid.”
“Whatever,” Katsuki grunts.
“Brat,” his mom says, looking a lot less annoyed and a lot more just frowning at him. Katsuki stares back up at her, frowning at her expression. “I get that you want to take care of them, but you can’t just bite every omega that you want.”
“Whatever,” Katsuki murmurs again, because it is whatever, he’s already bit Shouto, Hitoshi, and Deku, he doesn’t need to bite anymore omegas.
“Just apologize, got it?”
“Why?”
His mom opens her mouth to lecture him again, only to be cut off by the gate slowly creaking open, Endeavor standing in wait for them, arms crossed and scowling at Katsuki, to which Katsuki scowls back because he’s not scared of his mom or Endeavor.
“Endeavor-san,” his mom says tersely in greeting, the way she says ‘brush your teeth Katsuki', like she’s trying to contain herself from being angry but it’ll only last a couple of seconds anyway.
Endeavor doesn’t acknowledge his mom, gaze trailing from her down to Katsuki, eyes narrowing. “Katsuki.”
“Endeavor.” Katsuki puffs out his chest, baring his little alpha teeth because Shouto’s dad is an alpha, and other alpha’s need to know Katsuki is better.
“Cocky as always,” Endeavor snorts, rolling his eyes a bit. “You bit Shouto.”
Katsuki doesn’t move, keeping up his puffed-out posture because he saw the birds on the TV doing it last night, they used it for something called intimidation, and Katsuki wants to intimidation Endeavor. “My omega.”
Endeavor let’s out a roll of steam from his nostrils.
“Sorry, sorry, he’s been haughty ever since his alpha teeth came,” his mom rushes to say, smacking Katsuki on the back of the head and he snarls at her, rubbing at his head as he turns his glare onto her.
“He’s always been haughty,” Endeavor rumbles out in disapproval.
“Where’s Shouto?” Katsuki demands sharply, glancing around and frowning when he doesn’t spot Shouto right away like he usually does whenever he comes over. Well, usually Deku comes with him, but today his mom dragged him out of the house saying today isn’t for playing but for saying sorry, whatever he’s supposed to be sorry for.
“In the training room.” Endeavor grunts out, waving Katsuki dismissively. “You may go to him.”
Katsuki doesn’t say thank you, even though he knows his mom wants him too, before rushing away quickly from his mom’s side before she can snatch him and make him listen to their boring adult talk.
He loves the training room because he can always make explosions without anyone yelling at him, and Shouto can use his ice and fire freely without being lectured by the teacher’s, it’s always fun. He easily slams open the door, Shouto busying himself with making little lumps of ice on the ground, unbothered by the door being slapped open, and Katsuki grins ear to ear as he lets his palms crackle.
“Dad?” Shouto asks as he turns his head, blinking with confused eyes when he spots Katsuki.
“Nope,” Katsuki grins, stalking forward while ripping off the formal shirt his mom made him wear, “let’s train!”
Shouto just let’s out a small pathetic whining sound of reluctance that Katsuki ignores. He knows Endeavor only lets him train with Shouto because Shouto drags his feet and doesn’t want to train unless Katsuki is practically holding his hand, but Shouto is strong, so Katsuki wants them to be strong together. Like the shows with a hero team of an alpha and an omega, Hitoshi’s quirk is cool, but it isn’t flashy, and Deku is quirkless, so that means Katsuki has to make sure Shouto ends up strong so they can work together.
It doesn’t take long for Endeavor to wander in after him, looking more pleased with himself when he spots Shouto reluctantly using his fire as Katsuki demands more, before he moves to come and train them both.
All in all, a good Saturday, and Katsuki forgets completely that his mom wanted him to apologize about something.
*
He sees Deku the most after school and on weekends, then maybe Shouto, and the least would be Hitoshi. Hitoshi’s parents only partly tolerate him, especially his mom, and they are both pro-heroes, so they’re often too busy to arrange play dates and like to have as much family time with just the three of them as they possibly can.
Sometimes, though, it ends up like this.
“I’m sorry to intrude on you like this, Bakugou-san.”
“It’s fine, it’s fine,” his mom says easily as she always does whenever Hitoshi’s parents bring Hitoshi over for a couple of days. “You really don’t need to thank me, especially with Katsuki being a little brat all the time.”
“Not a brat,” Katsuki huffs, focusing his attention on Hitoshi who is sulkily looking down at the ground, unshed tears at the corners of his eyes.
“I’m sorry, Hitoshi,” Hitoshi’s mom says while crouching down, his face devoid of any expressions. Katsuki sees a lot about omegas on TV, they’re usually small, pretty, and always seem like they’re on the verge of crying, but Hitoshi’s mom is big, strong, and never really looks like he feels much of anything. He’s a cool hero, Eraserhead, not a hero that he’s ever seen on TV, but Hitoshi tells them proudly that his mom is the best hero (something Deku always has to bite his lip in correcting that All Might is the best).
“D-don’t go,” Hitoshi stutters out sadly, his tears falling a bit more freely.
Deku, who had come over to play with their All Might action figures, not dolls , tears up automatically at Hitoshi tearing up, grasping tightly at the back of Katsuki’s shirt. Katsuki wants to roll his eyes, because Hitoshi does this every time his parents leave him here. He’d think by now Hitoshi would get sick of crying about it.
“I won’t be gone long,” Eraserhead says quietly, “you’ll have fun staying with Katsuki.”
“No. I won’t,” Hitoshi pouts out, just to make sure he gets his point across.
Katsuki can’t help but roll his eyes harder at that.
*
Hitoshi’s tummy always hurts after his mom leaves him for a couple of days with his family.
His mom told him once that ‘little kids always miss their parents’, but Katsuki thinks it's probably one of those omega things he doesn’t understand, because Deku gets all teary-eyed when he’s apart from his mom too long, too, and Katsuki has never been sad being away from his mom. Or maybe it’s just a him thing.
Hitoshi always gets sulky initially, before he finally warms up to the idea that his parents haven’t abandoned him, so Katsuki leaves him alone, for now, instead going back to playing with Deku.
“I wanna train with you and Shouto…” Deku murmurs sleepily after they’re done playing with their toys, little chubby fingers wrapped over his huge All Might action figure that Katsuki had bullied his dad into buying him. A part of him knows he should be a good alpha and give it to Deku, but he likes it too much to give it to him. Plus, this way Deku has to come to his house if he wants to play with it. He likes that.
“Why?” Katsuki murmurs, disinterested, because Deku always says useless stuff like that.
“I wanna be a hero too,” Deku says with slightly teary eyes.
Katsuki knows what quirkless is. He knows some people are just born without a quirk, even if it’s a small amount of people. He’s heard his parents whispering about it, that Deku probably won’t ever get a quirk and how it’s ‘so sad’. It’s not sad , it’s annoying. It means Katsuki will have to become even better and stronger to make sure he can protect useless quirkless Deku. Hitoshi and Shouto have quirks and powerful hero parents to help them, but Deku only has him and his weak mom.
“Whatever,” Katsuki huffs, “even if you become a hero, I’ll be a better hero than you.”
“You don’t know that Kacchan!” Deku puffs out, offended. “I’m going to be the greatest hero ever, just like All Might!”
“Then I’ll be even better than All Might!”
Deku’s face goes red in annoyance whenever Katsuki even implies that he’ll be better than All Might, and Katsuki hates how Deku will be all ‘ you’re so cool Kacchan !’ but he’s always second to All Might. Stupid All Might. He’s going to be cooler than All Might ever was.
“I’m going to ask Shouto to let me train with you guys,” Deku says stubbornly, “Shouto believes in me!”
“Shouto is dumb!”
“You’re dumb!”
“Woah, wait a second boys,” Katsuki hears his mom say as she rounds the corner, Hitoshi trailing dutifully behind her with a sippy cup in his hands, because Hitoshi and Deku are babies that like to suckle on sippy cups. “What are you two screaming at each other about?”
“Katsuki is being mean and dumb,” Deku breathes out quickly, tears gathering at the corner of his eyes.
“He always is,” Hitoshi murmurs softly from behind.
“Am not.”
“Enough,” his mom snaps out sharply. “How was he hurting your feelings?”
Deku shuffles a bit, a weird habit of shyness he does whenever he’s trying to express his wants to people outside of the four of them and Deku’s mom, but finally he looks up with a determined glint. “I want to train with Kacchan and Shouto, I’m going to be a hero!”
“Oh,” his mom breathes out, a weird, pinched look passing over her face before she pushes a smile up. The face his mom makes when she’s lying. “Well, you would have to speak to Endeavor about that, Katsuki doesn’t have control on who can come or not, Izuku.”
“Oh,” Deku says, blinking with wide eyes. “Ok, I’ll ask Endeavor!”
“Right, so why don’t we settle in for some TV for the night then, huh?”
Hitoshi and Deku give cheery replies to which movies they wanna watch, dumb baby movies that don’t have big explosions or heroes in them because apparently those kind of movies scare them. Later, before bed and Deku already back home, his mom catches him alone.
“Katsuki,” she says carefully, Katsuki busy trying to find the stupid stuffed cat Hitoshi’s mom brought for him downstairs by the couch, her hovering behind him weirdly.
“What?” he grumbles out, irritated.
“Izuku will likely never get a quirk.”
“I know,” he murmurs, because he does know. Deku’s cried about it a lot, even if he likes to act all brave and say he’ll become a hero anyways now.
“Ok,” she nods sharply, “take care of him, okay?”
He shoots her a nasty look because he hates when people tell him to take care of Deku, he’s their alpha, of course he’d take care of them.
Adults really are stupid.
*
Endeavor says no to Deku joining in, as the old fart is heartless and mean, and all things evil. Secretly, Katsuki is happy.
Training is the special time between him and Shouto, the one thing the two of them can always share without anyone bothering them. There’re no annoying extras squealing at Shouto and him about how they’re quirks are ‘so cool!’, no teachers to scold them, no Deku or Hitoshi being jealous. Just them.
His mom had been annoying him all morning, so stubbornly Katsuki had decided to grab his plastic sword and go for a short quest to go visit one of his omegas. He tried Deku first (closest to him distance wise), only to find the apartment empty, which led him to making the trek to Shouto’s house without his mom driving him. He would have tried Hitoshi after Deku, but Hitoshi’s mom doesn’t want to tell him where they live. Katsuki thinks it's stupid, but adults always are a bit dumb.
He doesn’t ring the doorbell, because he never does, sauntering in happily and pausing when he hears laughter in the yard.
When he blinks, three other kids are staring back at him.
“Who are you?” Katsuki demands, raising up his sword and narrowing his eyes. Panic lacing through him at maybe the idea that Shouto has had secret friends that pop in when he’s not around. When his alpha is missing.
“Who are you?” The oldest looking one snaps back, eyes narrowing.
“Ah,” Katsuki pauses, turning to look at the older woman with white hair sitting on the deck. He’s seen her once, Shouto’s mom, she’s light, frail, like she could be pushed over and die like a video game character. “Katsuki, are you here to play with Shouto?”
He’s never liked her.
“Who’re these losers?” Katsuki demands, nostrils flaring. All three of them are alphas, he can tell. They smell like alphas, at least. It makes his hackles rise in warning.
“Shouto’s brothers and sister,” Shouto’s mom says gently, a sad tinge to her smile. She always smiles sadly, it’s why Katsuki doesn’t like her. Most of the omegas he knows are powerful, stubborn, annoying, but they are never sad.
He remembers once Shouto telling him his dad doesn’t let him play with his siblings because ‘they’re weak with weak quirks’. Honestly, he had forgotten Shouto even had siblings and a mother.
“Where’s your mother?” Shouto’s mom asks this time, head tilting to the side.
“I ditched her.” Katsuki huffs out proudly, chest puffing out, before turning his nose up to sniff. His sense of smell isn’t great, but usually if he really, really tries he can smell where Shouto is. He doesn’t need too though, eyes flickering as Shouto appears before his vision behind his mom, big teary eyes blinking in surprise.
“Kat-ki?” Shouto whimpers out.
Shouto isn’t a crier, not like Deku is, Katsuki surprised, then worried, then angry, before quickly rushing forward, eyebrows drawn down in confusion as he gathers Shouto closer to him and away from his family.
“Why are you here?” Endeavor’s voice cuts through the quiet of the yard, Katsuki slowly looking up to meet Endeavor’s gaze. Usually when they meet Endeavor isn’t full of flames, but right now, he looks almost engulfed by them. The rest of the family is quiet, Shouto’s mom simply looking down at her clasped hands.
Katsuki frowns.
“You’re scaring Shouto,” Katsuki snaps out soothing the palm of his hand over Shouto’s head, making sure to make the strokes long and warm, just like how Deku likes to be comforted. He leans forward to put them cheek to cheek, glaring up at Endeavor from under his lashes, just for good measure. “Good alphas don’t make omegas cry.”
Endeavor looks surprised momentarily, and Katsuki loves when he can make other people look dumb in shock, before the flames that were licking his face disappears quickly.
“He needs to train,” Endeavor tells Katsuki seriously.
“Omegas need to rest and sleep a lot,” Katsuki shoots back, baring his teeth into a snarl, “don’t adults know that?”
“You—”
“Train me instead,” Katsuki grins, his lips curling happily at the prospect, “I’m bored anyway.”
Endeavor pauses, there’s something searching about his gaze.
“An alpha has to be strong,” Katsuki tells Endeavor, encase he’s dumb and doesn’t know the obvious, remembering what his mother has told him so many times, “so I need to be strong for Shouto.”
“He has to be strong on his own,” Endeavor says curtly.
“I’ll be stronger,” Katsuki huffs, rubbing their cheeks gently as he smiles at the idea, “because I am the greatest.”
Endeavor pauses, his hands tightening in on themselves as he narrows his eyes, before letting out a long sigh. “Your parents don’t know you’re here, do they?”
“Whatever,” Katsuki dismisses.
“Fine, come,” Endeavor decides, and Katsuki lets out a pleased chirp at the idea of getting to train, soon he’ll turn six, and he’ll have to make sure no one in their class even thinks they can best him in the slightest. He has three omegas to protect, he has to be stronger than everyone else.
“Stop being dumb,” Katsuki tells Shouto, leaning forward to place a quick peck to his cheek, right where his parents kiss him in order to comfort him, before pulling away and trailing after Endeavor.
He can already feel sparks on his palms in excitement.
*
He ends up at the Todoroki house more after that, essentially every school night.
He sees Shouto’s family more, of course, mostly deciding not to bother with them too much, as when he’s there he’s there to train in Shouto’s steed. He knows his mom and dad don’t like it, they don’t like that he comes home with bruises, with cuts, with exhaustion written over his face as he drags his body to the table to eat dinner before passing out to sleep.
He doesn’t care though. He’s strong, he feels strong, training with Endeavor makes him stronger. Sadly, after a couple of weeks (and his mom yelling at Endeavor a few times and threatening him with castration) the ‘training’ is cut down to twice a week on weekdays and once on weekends, Shouto still being held to a schedule of twice a week, total, because omegas need a lot of rest.
*
He hums happily as he allows his plastic sword to go tack tack tack against the metal railing of the bridge, Deku and Hitoshi holding hands as they trail behind him not slapping their swords against the bridge, but instead just holding them as they try to look for fish in the river below.
He had taken them for a quest, a mission, because heroes have missions. He just doesn’t know exactly what they are supposed to do yet, but he’ll find something, he’s sure.
“Oh! Katsuki!” Katsuki can only frown as he hears his name at the end of the bridge, some of their classmates appearing before his vision in the park he likes to play at because this park has the biggest slide. Scary stuff. “Come play!”
“We’re on a mission,” Katsuki informs them, chest puffed out, “so get lost!”
“A mission?” He hates how his classmates' gazes’ flicker to his omegas behind him, he can read before they even say it, they want to ask ‘with them?’ because their classmates think Deku if quirkless and weak (he is) and that Hitoshi’s quirk is better suited for being a villain (kind of). It’s insulting, because they should know that Katsuki is strong enough to make up for their weaknesses.
Hitoshi, usually, doesn’t want to interact with their classmates too much, mostly because if he accidentally uses his quirk people always cry and get scared and then the school is called and blah blah blah, but much to Katsuki’s unpleasant surprise, Hitoshi says, “let’s play!” dragging Deku along with him past Katsuki and into the park.
Katsuki frowns, allowing his sword to fall to his side, before grumpily trailing after them, mission plans ruined.
Predictably, because their classmates are losers, they all part away from Hitoshi, peering at him worriedly, like if they touch him they’ll be infected, but Hitoshi stubbornly ignores them, happily climbing up onto the playground as Deku giggles and follows him.
He knows Hitoshi’s dad has told Hitoshi to ‘try being nice to the other kids’ because he’s worried that Hitoshi only seems interested in having three friends, total. What’s wrong with three? Katsuki will never understand adults.
“Come play with us!” Hitoshi says, more quietly, less confident, and Katsuki’s eyes narrow in on how the extras that so easily talk to him immediately look nervous, terrified of so much as replying to Hitoshi. Katsuki thinks Hitoshi’s dad is a bully, otherwise, why would he tell Hitoshi to go get his feelings hurt?
“Comin’!” Katsuki yells back confidently, shooting the dumb extras a quick glare before rushing forward, already knowing that Hitoshi and Deku have probably conspired on playing the most boring game known to mankind.
He’s right as he gets up that their game turns out to be who can slide down the slide the quickest, to which Deku cries the entire time, right up from before he goes down the slide, to when he’s on the slide and after he slides down the slide, Hitoshi busy piling rocks on top of each other as Katsuki tries to calm Deku down.
The other kids had ditched eventually, not wanting to be forced into playing with Hitoshi. Deku they never minded, but if Hitoshi was nearby or joined in and Katsuki didn’t explicitly make it look like he’d beat anyone up if they so much as ran just because Hitoshi was nearby, their classmates would book it.
When Deku is done crying, Hitoshi’s pathetic rock pile becoming larger and dumber, Hitoshi finally mutters, “why do they hate me?”
“Why does it matter?” Katsuki blurts out, frowning. He doesn’t hate Hitoshi, Deku doesn’t either, so why do their classmates' matter?
“I like you!” Deku chirps out, a gummy smile already on his face, tears forgotten.
“Yeah...” Hitoshi mumbles softly, glancing up at them with furrowed brows.
“Let’s go,” Katsuki says instead, reaching out to grab Hitoshi’s hand and concentrating realllly hard to make sure no blasts start. He’s been getting better at it since he started training with Endeavor.
*
The next day at school he arrives before Deku, Hitoshi or Shouto, making sure that their classmates learn exactly what will happen if they try to ignore Hitoshi again, which results in him getting sent to the time out corner for the entire day and half of his classmates red-eyed and snot-nosed, but after that, they don’t dare ignore or exclude Hitoshi from their games again.
Hitoshi believes it’s because of his own hard work, his efforts to seem nicer and less scary, and Katsuki wants to show off, to make Hitoshi know he did good and will continue to make him happier, but his mom tells him to let Hitoshi have this himself.
So he does.
Because that’s what good alphas do.