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Sukuna was over the moon, blood pumping through his veins erratically.
He had just presented as an alpha, way too early at the age of 13, and it was right before this year's mating run. He could never believe his luck.
He’d had his eye on an omega for a while now and while he knew without a doubt what he’d present as, he was worried they would get caught before he got his chance.
Still, he shouldn’t have ever doubted the Yuuji Itadori. The most desired, and hardest to please, omega in town.
He was older than him by 5 years, presenting as an omega three years ago. Unconventional as he was, he was highly sought after as a result.
He was tall, strong, beautiful, and wasn’t afraid to put an alpha in the ground just for looking at him wrong. Completely different from all the other demure, coquettish omegas you’d see.
All three years, Yuuji had been chased by multiple alphas and he always came out with a bare neck, smiling wide.
That all changes this year though.
After Sukuna’s first rut had passed, he ran out of the house, still covered in sweat and a new smell of smoke and cinnamon.
At this time Yuuji should be in the town square, doing errands or the like for anyone who asks. He makes his way through the streets, twisting and turning until he sees the shock of pink he was looking for.
“Yuuji Itadori!”
His voice is loud, crossing the bustle of the street with ease. Several sets of eyes land on him but he’s only aware of the smoldering amber meeting blood red. Yuuji quirks an eyebrow, recognizing the pup as one he’s run into quite a few times now.
Sukuna crosses the street, pushing people out of his way. The smell hits Yuuji and he blinks in surprise.
“Well, look who’s not a pup anymore.”
He smiles coyly, already guessing what Sukuna is here for. Hand on his hip, he lets the new alpha grab every ounce of his attention, curious.
“Yeah, and this year I’m gonna claim you. That’s a promise!”
Yuuji covers his mouth, trying to stifle a laugh. If anything it’s cute and he doesn’t want to hurt the kid but he’s 18, he has no intention of letting any alpha ever catch him let alone a wet behind the ears first presenter.
“Sure kid, good luck, I’m rooting for you.”
There’s a bit of a mocking tone to his voice which simmers Sukuna’s blood but he doesn’t let it show, just nodding resolutely and stalking off.
Days later, the mating run has a scheduled date. Sukuna realizes there was a massive oversight on his part. Since he just presented with his first rut, he won’t get another for months. He’s going to be participating this year with half the instincts he should have, half the drive.
He’s at a severe disadvantage even if his inexperience and age weren’t counted for.
Still, he won’t be giving up no matter what. Yuuji will be his.
The day comes and it’s blistering hot. His mind is calm, staring Yuuji down. His new teeth ache as Yuuji’s spiced honey and peaches wafts through the air, so close to his own heat.
The omegas go first and Yuuji is off, faster than anyone else and out of sight in seconds through the dense foliage. He has a bright smile on his face, loving the freedom, athleticism, taking it all as some kind of game.
A way to show off his skills, boast at every alpha that’s ever thought he was lesser for being an omega. No, he was better.
Sukuna’s very being sings for him and when it’s their turn, he’s pumping his legs as fast as he can. He’s quick for a kid so young, probably already ahead over half of the alpha’s he’s running with.
He lets his nose carry him, sometimes heavy, sometimes light, and it isn’t until he reaches the other side of the forest hours later that he realizes he was no match. Not yet, at least.
He sees Yuuji, fully in heat, sweating and panting while standing over an alpha, face beaten to a pulp. He hears groaning and sees others lying around, likely having met the same fate.
“Yuuji…”
The omega looks over at the soft call of his name, eyes a molten honey as he takes the alpha in, either as friend or foe, his instincts haven’t decided yet.
“Oh you… hi, Sukuna right? Don’t come over here, yeah? I’d hate to have to put you down too, you’re a bit too young for that. But I’m really proud you got so far!”
Even like this he’s encouraging Sukuna. If his mind wasn’t already made up, now it was. He straightens his back, resolute in posture, conviction, and tone.
“Yuuji, I like you.”
The sudden serious confession confuses Yuuji but he recovers quick smiling gently.
“Then hurry and grow up so you can meet me here.”
He lets go of the alpha’s collar still fisted in his grasp and trots right past Sukuna. And just like that, his first mating run ends unsuccessfully.
The next year he’s grown taller, stronger. He’s a model alpha, 14, with a bit more experience now while most of his peers of the same age group are presenting on time, nowhere near his level. As an early bloomer, they all look up to him but he couldn’t care less.
He’s never intended to make friends, or gain attention or respect. His eyes have only ever followed one person for years now.
Ever since his first mating run, Yuuji has taken an actual interest in him. Nothing indecent but Sukuna will take everything he can get. Greedy.
He hangs around the omega, helping him in any way he can and trying to always swarm around him. Yuuji shows no dislike for the behavior and always welcomes him by his side. Maybe he’s greedy too.
Now the same height as Yuuji, he grabs his shoulders, holding him in place with a stare that could freeze anyone.
“Yuuji, the mating run is in a few months.”
Yuuji smiles knowingly and nods.
“Of course I know that. You’re telling me this why?”
Sukuna’s grip tightens and he growls lowly.
“Don’t let anyone catch you, you’re mine this year.”
Yuuji throws his head back in a laugh, patting Sukuna’s hand before pushing it off.
“You know I don’t need to be told, I can outrun anyone. And I’ll be outrunning you too, you’re not catching me this year or any year. And I’m not going easy on you like last time.”
Sukuna frowns at his confidence but it’s not like it's unfounded. He’ll prove him wrong though and they’ll be happily mated with tons of pups. He feels a bit childish at the proclamation but he can feel it in his bones. Yuuji’s practically promised to him.
He can already imagine it right before his eyes, taste the honey on his tongue. Feel the slow drip of peaches down his chin.
Instead he finds that he’s tasting grass and dirt and what he sees is Yuuji standing above him with cracked knuckles. What’s running down his chin is his own blood, lip busted.
It takes a few minutes to gather his thoughts. That was months ago, the mating run had already started. He got hit so hard his memories were muddled, time suddenly catching up to him in a daze.
He had pushed past all the alphas, outpacing them with ease and going after Yuuji. He found him faster than the first year but before he even got a word out there was a punch to the jaw and an elbow to the temple.
His vision swims, probably a concussion. He can’t help but smile.
“You ok there pup? I hit you pretty hard.”
Sukuna nods dumbly and stays lying there, content to watch Yuuji continue to fend off alphas while he collects himself, enjoying the sight at the very least.
Yet another year of failure.
He doesn’t give up though, sticking to Yuuji like glue all throughout the other 11 months, like he does every year.
As he gets older he continues to grow into your standard alpha; tall, built, a desire to protect, and possessive to the max. Despite not having been able to catch Yuuji two years in a row, he acts like his alpha anyways.
He’s scenting him every chance he can get, giving him gifts and warding off other alphas with glares while in Yuuji’s presence, with violence when without.
They spend more time together day to day and he starts to see the person behind the omega.
He has always admired the beauty, the strength, the subjugation. But laying in the grass, pressing Yuuji to the ground gently in the dying light, he sees the kindness, the mirth, the desire to simply be.
“Yuuji I like you.”
He can’t stop himself from saying it, their eyes never straying as a light breeze tussles his hair. Yuuji chuckles and his heart swells.
“You tell me that all the time. You’re never gonna give up are you?”
Sukuna shakes his head, ducking down to scent Yuuji. It’s bad manners, scenting an omega that isn’t yours but neither follow etiquette like that, clearly.
Sukuna turns 15 and he’s unable to place a bite on Yuuji’s neck.
When Sukuna is 16 he tries again. He fails.
At 17 he comes up short again, typical.
Even again at 18, bigger than ever before, stronger, faster, he’s still unsuccessful.
Not a single year is he able to win his prize. He tries his best and even gets closer, going from being knocked to the ground or outrun to getting into actual fights. They roll in the dirt yet Yuuji comes up triumphant every time.
He still loses. He never gives up, nevertheless.
He finds he doesn’t really mind all that much. He and Yuuji are practically inseparable, year after year they get closer. As long as no other alpha gets him, he thinks he’ll catch him one year.
He knows he couldn’t live without Yuuji. If he did get mated by someone else, he’d probably kill the other alpha, then Yuuji, then himself. He knows he’s crazy enough, he thinks Yuuji knows that he is too.
He likes to pull Yuuji to his chest, running fingers through soft hair while talking about their future together. Yuuji never denies him the fantasies and it only makes him bolder.
By the time he’s 21 and Yuuji is 26 he still hasn’t caught him. No one else has either but they never stop trying. Still, it’s well known how bad Sukuna wants him and it’s also well known that no one can compare to Sukuna.
He’s run after him 9 total years now and he shows no signs of stopping, his eyes never straying to another, never tempted not even once.
If anyone were to claim the elusive omega, it would be him. They still like to dream, he supposes he can allow them the grace to do that much.
He’s huge now, probably as big as he’ll get, very clearly the strongest alpha around. He’s also quiet and patient, sometimes extremely aggressive though never in front of Yuuji. He almost comes off as brooding.
Yuuji’s really the only one that can even stand him, everyone else avoiding him at all costs.
Sukuna wouldn’t have it any other way. He can’t stand being near others, the only thing that can keep him calm and placated is his omega’s scent. If he goes even a single day not smelling of peaches his mood is in the dumps and he makes it everyone else’s problem.
22 and nothing. Another disappointing year. Another year burying his face in Yuuji’s chest with a whine.
“I will never ask you to let me catch you but just let me catch you.”
That makes Yuuji laugh hard, patting Sukuna’s back as if to console him.
“You want a challenge and you’re getting it, what could you possibly be upset about?”
Sukuna brings his head up, facing Yuuji with a serious look. The intensity steals the breath out of his lungs and his cheeks heat up, suddenly embarrassed.
Sukuna sits up, crowding him until his entire body is wrapped around the omega.
“Are you dense? I want to claim you. Pup you every chance I get. I’ve wanted you for over a decade now and I can't help but feel inadequate. I’ve never felt like I wasn’t enough unless it’s regarding you.”
Sukuna is not an honest person. He doesn’t lie, sure, but he keeps his truths hidden deep where no one can ever find them. To say this without prompt, of his own volition, speaks to how serious this is to him.
Yuuji can’t deny he feels the same. He’s been getting chased since he was 15 and every alpha was the same to him. Someone he didn’t know well, didn’t like the smell of, and only saw him as a conquest.
Sukuna saw him as a challenge but also as a prospective partner. A real one.
He liked that Yuuji could hold his own, had the strength to back up his convictions. He liked his softness too, his kindness. He actually saw him and still wanted him.
Hell, they’re practically glued to the hip at all other times of the year, no other alpha has pursued him as a person beyond his womb. Beyond the run.
He thinks back to the pup calling him from across the street, a terrifying grin that looked sincere in its own way directed at him. He saw no one else, just him.
He probably knew since that moment that he’d be his alpha but he wouldn’t be Yuuji Itadori if he didn’t make him work for it.
He calls his name, getting a grunt in return, the face pressed back into his chest again.
He calls again, another grunt. He sighs.
“Alpha.”
That gets Sukuna’s attention, head shooting up, crooning softly.
Yuuji laughs, acting innocent.
“You know, you keep telling me you like me and how badly you want to build a life with me but where would we even live? I need to have access to the forest you know; so I can run and hunt and swim. And what about pups? Do you even have a crib ready?”
He’s just teasing him, listing off things to get him riled up but Sukuna just gathers him in his arms, hoisting him up with ease and starts walking. Yuuji shrieks, arms wrapping around his neck.
“Hey, where are we going?”
Sukuna doesn’t answer, continuing to walk. He doesn’t even look at Yuuji but he can see his jaw clenched.
The sun slowly sets, fireflies making their appearance and dancing around them. It gets a bit chilly and Yuuji tucks himself further into Sukuna’s embrace who holds him tighter in turn.
Yuuji realizes they’re getting further and further from town and when Sukuna starts entering the forest, his heart rate picks up. He wants to trust Sukuna but without any words, it's getting hard to.
He’s about to say something, maybe even make a run for it, before Sukuna finally speaks.
“You’ve told me that kind of stuff before. I listen to everything you say.”
They push through some bushes into a clearing and Yuuji’s eyes fall onto a cabin. There’s a garden, looking new-ish, the earth still dark and freshly tilled, buds young. He can hear the sound of a river nearby.
The house looks cozy, sturdy and reliable, not small at all. Just right.
“Is this…”
He doesn’t need to finish his sentence, he already knows. Sukuna nods anyway.
“I’ve spent quite a long time getting this ready. For you.”
He walks up to the door and opens it. Inside it’s pleasantly warm, fully furnished, though clearly not lived in. He sets Yuuji down, who immediately walks around to check things out.
The kitchen is big but not too spacious that it’s a waste of room. The master bedroom has a large bed and plush blankets, perfect for nesting. There’s another room at the end of the hall with a still incomplete crib. Yuuji turns to Sukuna, watching him scratch the back of his neck, looking away.
“On the off chance I never did catch you… this place would be abandoned. It’s for you and you alone.”
Yuuji has no words. Sukuna really had been listening all these years, quietly cataloging everything he said and figuring him out like a puzzle.
Sukuna walks forward to stand in front of him, not stopping himself from scenting the omega.
“I like you Yuuji.”
Yuuji nods, standing there stiffly before he remembers where he is, his arms suddenly shooting up to hug Sukuna hard, bones creaking.
“I like you too Sukuna.”
This was the first time he’s said it. Sukuna had a feeling but Yuuji’s always been placating, teasing. He could’ve just been humoring him all these years and he wasn’t taking a chance in guessing in case he was wrong. It would ruin him otherwise.
He hugs Yuuji back, burying his nose in Yuuji’s neck.
“Let me make you mine. Please.”
His voice is so soft, pleading. Yuuji doesn’t hear this often, the usual confident and brash alpha with a sharp, blinding smile nowhere to be seen.
It’s odd, he thinks he might like this Sukuna more.
Yuuji’s the one to take a step back, keeping them close as he leads them backwards. They stumble through the space until Sukuna realizes he’s being led to the bedroom and he suddenly picks Yuuji up again, crossing the threshold in haste.
He throws Yuuji down on the bed, leaning over him with a wild look in his eyes.
There’s a hunger there but also an intense yearning. Yuuji feels the same, heat pooling in his gut as he pulls Sukuna into a messy kiss.
Neither one of them have ever done this but they make do, learning as they go, letting instinct guide them.
Sukuna never thought this would happen. He expected it to be triumphant, the best and only way a mating run should end. Instead, neither are in heat or rut and they fumble around as a result.
Yuuji’s a blushing mess, looking away, and Sukuna isn’t faring much better.
Clothes come off feverishly only for Sukuna to stop, staring at the prize below him.
Yuuji’s prettier than he could’ve ever thought. He’s covered in silvery scars from his many years of besting alphas. He’s all lean muscle and soft skin, perky nipples and heaving chest.
Yuuji grows emboldened at the lustful stare, his hands reaching up to trace the ridges and valleys of Sukuna’s torso. He’s sculpted expertly, Yuuji drooling at the thought of such a worthy alpha finally taking what he had technically claimed years ago.
The kiss they share is uncoordinated and the hottest thing either has ever done, hands gripping and pulling every which way. For a second, they fight for who goes on top until Sukuna decides he’s had enough, scruffing the omega and opening his legs with his free hand, fingers sinking into his cunt without warning or delay.
Yuuji’s back arches, gasping loudly. He’s never been scruffed, never let anyone close enough to do so. He’s also never felt a touch that wasn’t his own.
Sukuna’s pace is fast, searching and relentless. Yuuji scratches at his arms but he doesn’t stop, bringing him to the fastest and most intense orgasm he’s ever experienced in his life.
The clean sheets now smell heavily of them, sizzling peaches with a cinnamon spiced honey glaze. It’s euphoric and confusing. So different but so right.
Sukuna doesn’t stop his hand, pressing his fingers deeper and kissing Yuuji until he can’t breathe, until he’s cumming all over again.
He coos when Yuuji whimpers, overstimulated already. He draws his fingers away, licking the slick dripping down his arm to give Yuuji a break.
“Omega, you’re doing so good for me.”
There’s a pleased rumble in his voice and Yuuji purrs, giving way to his secondary gender like it's natural, like he hasn’t been fighting it all his life.
He rolls onto his stomach and draws his hips up, presenting properly with a huff, sounding almost impatient.
Sukuna chuckles, drawing close and pressing against him persistently.
“And here I thought I’d give you a break.”
Yuuji snaps his omega fangs, as if offended.
“I drew you in here, you think I’d let things stop there?”
Sukuna nods, grasping himself and lining up, the head pressing inside Yuuji slowly.
“Once we start there’s no going back. I’ll claim and pup you right now, if you want to back out-”
Even now he was still worried. As flattered as he was, Yuuji was having none of it, pushing himself back until Sukuna’s fully sheathed inside him.
They both moan at the feeling and it’s all the encouragement Sukuna needs, pushing Yuuji all the way prone before drawing his hips back, pulling all the way out before slamming back in.
Yuuji’s seeing stars, wailing and begging below the younger man. Sukuna’s only spurred on, responding in kind as flesh meets flesh, the feeling like lightning in their veins.
A particular thrust has Sukuna right up against his womb and Yuuji’s head shoots back, pupils wide as he growls.
“Knot! I need-”
Yuuji’s begging for a knot, for a pup from the alpha he’d given himself to long ago. Sukuna gives it to him, pressing in so deep it’s bordering on painful. He pushes further even still, his knot fully formed and popping in with a slick sound.
The first shot of cum shocks Yuuji’s system who squirts on the spot, spasming and drawing even more of his alpha inside him.
Sukuna leans in, lost in the pleasure as he bites into Yuuji’s scent gland without thinking.
The sudden bond has them both rolling into another orgasm, draining their body of energy and pushing Yuuji’s womb to the limit, the knot barely keeping it all in.
Yuuji never wants this to end, and with the new claim bite it’s sure that it won’t for the next week, a forced heat ensured.
No one in town sees the pair for several days, not thinking too much of it until Yuuji comes strolling in to do his usual shopping with his usual stuck like glue alpha.
Except now a bite is on display and the scents they give off are so potent it’s clear what happened.
People are surprised. They knew it was likely to happen but with how adamant Sukuna was about the mating run, they never expected it to happen on a random day at the beginning of spring, or any season for that matter.
It’s kind of romantic in a way, pups of all ages looking to them as some kind of love story for the books.
And maybe it is, the proof being in the pudding with many, many pups in their future.