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sugurouge · 6 months ago

Text

— sting: alpha!miya atsumu x omega!f!reader

content warnings! DARK CONTENT, taboo topics, non-canon, (pseudo-)incest, stepcest, omegaverse, heavy topics of jealousy, possessiveness, dubcon marking, begging, very submissive reader, cheating, breeding kink, dubcon knotting, obsession, some blood

summary: in a society divided by secondary genders, a young girl is adopted into the prestigious miya family, defying conventions due to her undeniable charm & precious nature. as you grow up, your bond with atsumu shifts, leading to a complex mix of emotions & forbidden desires

wordcount: 4.6k

fyi: atsumu & reader were pretty much attracted to another since her secondary gender was revealed. reader is one year younger than the twins

a/n: for @goxjo's omegaverse collab! make sure to check out the other works if you've enjoyed my lil story. pspsps thank you for letting me join, aki my luv (˶˃ᆺ˂˶)

──── ✧*･ﾟ*✭˚･ﾟ✧ ────

by clicking read more you are agreeing to consume and read dark content.

In a society where the hierarchies of alphas, betas, and omegas define social standing and family legacy, adoption is a rarity. Families fiercely guard their bloodlines, refusing to weaken their position with the introduction of an outsider. Yet, in the case of the Miya family, exceptions were made when they saw you. Abandoning a helpless young girl you was never an for your future mother. You were too precious to be left behind.

From the moment your adoptive parents met you, it felt like a blessing. Your sparkling eyes and adorable smile captivated them in an instant. You, in all your little glory, were a true delight.

Neither you nor your new family can recall a time before you became part of their lives. The notion of your adoption was never mentioned, for it didn't matter. To you, they were simply your family, your pack. The protective embrace of the Miya family, renowned alphas, became your sanctuary. Under their care, the eventual reveal of your secondary gender was irrelevant. What mattered was the bond, the love, and the undeniable connection that tied you all together.

To your older brothers, you were their cherished little sister—sweet, gentle, and always eager to bridge the gap between them. You strived to ease their conflicts and show your love for each one of them, appreciating their unique qualities and talents equally.

Yes, you had no favourite. You loved them equally, and they both loved you in return, as their family. Until one didn't. Until something changed.

Suddenly, one of them seemed bothered by your mere presence. Always leaving the second you entered the same room, averting his gaze if your eyes were to ever meet, and ignoring your entire being at school.

This intoxicating, honey-like vapour with hints of candied oranges radiates out for metres around, drenching the halls of Inarizaki High and leaving Atsumu drunk on you.

He can't think straight, can’t focus on sports or academics. You’re the unofficial reason girls are now banned from volleyball practice. Even worse, you’re practically banned from his life. The shift from affectionate brother to distanced meanie was too sudden for you to not feel hurt. So much for your sweet sixteen…

You practically ruined him overnight, your secondary gender holding effects unexpected to it. Now, instead of grabbing ice cream as a group of three, it's you alone. Unless Osamu can join, but even that seems to annoy the faux-blond. He seems irritated by everything you do or do not do. You’re lucky if he walks off without saying a word, as every time Atsumu loses control over his emotions you end up crying in your mother’s embrace. He locks himself in his room and tries to rid himself of the nasty thoughts and feelings he holds inside.

But then there are moments...

Moments when he turns soft, when you meet at night by accident in the kitchen and he’s too drowsy to control his instincts. Suddenly, gentle eyes can't seem to look at anything but you. Suddenly, the smallest space between you seems unbearable to Atsumu.

And you let him. You’re no better.

You embrace him, gently running your fingers through his hair, and hum softly—your tender care is utterly captivating. How could his hands not grasp the fabric of your shirt, his arms tightening around you to hold you close, as the warmth between you rises and your hearts beat in unison?

Yet, it all fades at the break of dawn. Only a faint blend of your scents lingers—reminiscent of breakfast, with comforting notes of cinnamon and sugar.

It’s as if the scene abruptly shifts, like a sudden cut in a film. The atmosphere returns to its former state, and you find yourself once again only conversing with Osamu.

◈

Until you turn 18.

Until your first heat starts. Your nest made of anything you could grab in time, stealing blankets, pillows, an accidental hoodie of Atsumu.Something about it seemed so awfully comforting, you couldn’t refuse.

At night, you weep with your face buried in the fabrics, trying to muffle the sounds of your distress while immersing yourself in the rich aroma of cinnamon and spice. You’re burning from the inside, the need to rip your skin from your bones is almost unbearable. Your feverish state leaves you crying under the moonlight's embrace, a trembling plea of desperate longing echoes throughout the night. You crave, you need, more.

But what about your brothers? While they were both forced to wear earbuds and use scent blockers, one suffered just as much as you. Instincts, after all, cannot be completely suppressed.

Atsumu groans, his head sinking into the pillows of his bed as his eyes flutter shut.. God, he loathes this. Loathes having to run his own hands over his physique to remove his shirt. He would much rather feel your soft fingertips dip beneath the fabric and explore his heated torso. Every passing second more agonising than the one before. His only refuge is the enveloping darkness as he presses his eyes shut, desperate to escape the burning torment he's sinking into. He can hear you through the walls, your whines and moans of pain piercing through his solitude.

He really needs to move out.

◈

Your parents welcome you into adulthood, finally granting you the freedom to seek out your life partner, your mate. Yet, your brother won’t even give you the chance to explore this new chapter.

No, after that night, everything changes. He’s unnervingly close, pressing himself against your back, shamelessly inhaling your scent, burying his face in the nape of your neck. He decks you in compliments and constant touches.

Suddenly, he's everywhere around you, determined to keep anyone else at a distance instead. He insists you wear his jackets to school, wrapping you in his scent and effectively isolating you from the world. His overprotective behaviour is so extreme that even your parents are baffled by Atsumu’s mood swings. His intentions unclear as they all believe in the family bond you all have built over the years.

And you never voice a word of complaint. You would never even dream of challenging Atsumu’s behaviour. In fact, you seem to revel in it.

Despite Osamu’s growing suspicions and the concern it stirs in your parents, their advice falls on deaf ears. Both of you refuse their suggestion: after all, he’s your brother! You feel secure with him close by and aren’t ready to meet your alpha yet. So, your parents can only observe from the sidelines, hoping and praying it’s smooth sailing until the twins move out.

Until the nest is empty.

◈

What they don’t know is how your older brother projects the echoes of your cries and whimpers during your nights in heat onto his fleeting encounters. At 26, he remains resolutely single, every blind date a disappointment, every hookup unsatisfying and hollow. The desire he feels for you overshadows every attempt at connection, leaving him unfulfilled and unwilling to commit.

Everything seems colourless, flavourless-until family calls.

◈

You’ve moved abroad for your studies, seeking to put distance between you and Atsumu, desperate to suppress the sick thoughts and desires that have plagued your mind. You hoped that a change of scenery, far from Japan, would help you start fresh, to find your alpha and live a life untainted by these unsettling feelings.

Yet, returning home for Osamu’s engagement presents an unexpected challenge. The stage is set: the occasion is beautiful, with halls adorned in flowers and sweets to celebrate the festivities. But amidst the elegant decorations, nothing captivates quite like you. Your presence is intoxicating to Atsumu, who can hardly contain himself. Forgive him for losing his composure. Don’t mind the intense stares from across the room, the desire pooling in his dark eyes that burns into your back. Promises made to his brother were forgotten the second he got a glimpse of you.

Suddenly, the suit feels too tight, the necktie suffocating, and his palms dry. Here you are. You, in a stunning dress that accentuates every curve. You radiate a glowing allure that confirms—you're at your prime, ripe for the taking.

A strong arm wraps around your waist, the heat of his body searing through the fabric of your dress. Without needing to turn, you already know who it is; his name escapes your glossed lips. “Atsumu.”

He pulls you close, his presence enveloping you, his voice soft and sheepish against your ear. “I’ve missed ya,” he confesses, the warmth of his touch sending shivers down your spine.

You’ve missed him too, of course. Yet you tried to replace him with someone morally acceptable—a volleyball player from New York, who bore a slight resemblance to your brother. But could he ever truly fill the void left by Atsumu?

The sweet mixture of scents turns sour before you can even reply to Atsumu, before you can admit how much you’ve missed him as well. His fingertips explore your neck, lingering on your scent gland, fainted dents still feasible for his touch. The pressure borders on painful, as he demands an answer with a dangerous edge: “Who?”

If looks could kill, you’d be a dead woman. Your anxious scent mingles with his anger, creating an intense atmosphere that seems to draw everyone’s attention. The events unfold faster than your family can react. You feel the sting of his nails digging into your skin, jealousy manifesting as sharp pain as blood threatens to stain your dress.

Osamu, ever the protector, shields you from Atsumu’s anger, ensuring to guide you out of the halls in a rush. “I apologise for what he did,” the dark-haired twin mumbles, as he patches you up. “It wasn’t supposed to go like this, I promise.” He meets your eyes with a searching look. “He swore to keep his distance. And I thought you’d bring your boyfriend.”

You finally admit in defeat, “He couldn’t make it. I didn’t want to pressure him either—it’s too soon for him to fly over ten hours just to meet my…” You hesitate, casting a glance around the room as a deep sigh escapes you, “…family.”

Osamu nods, understanding. He returns to kneeling in front you, his expression filled with concern. “I hoped that after all these years, Atsumu would have cooled off.”

You cut him off, feeling an odd need to defend the blond. “He never did anything wrong,” you insist, trying to convince both Osamu and yourself as your gaze falters. “I’m just as much to blame as he is.” With this declaration, you rise and offer Osamu your hand, helping him back to his soon-to-be wife and the rest of the guests.

Nothing could have prepared you for the smell—the overpowering stench that no flowers could mask. Atsumu sits at the table, his eyes unfocused as your father speaks to him, the words a blur as his lips move too fast for you to catch. You only learn the outcome of the conversation when your mother asks you to approach your oldest brother.

Standing beside him now feels different, a new layer of fear creeping into your emotions—something you never anticipated feeling from him. “I’m sorry,” Atsumu finally breaks the heavy silence, straightening up to face you while avoiding your eyes. “I guess my protective instincts went a bit overboard after… all these years.” He clears his throat, cringing slightly at his own words.

With all eyes on you, you can only hum in agreement before you’re guided to sit beside Atsumu. The effort to mask the sour scent of his anger and soothe him only possible with you being closeby. You have to forget about your own feelings for the day; after all, the event is meant for enjoyment and celebration. Every smile you force, every laugh you share feels tainted with an aftertaste of discomfort, yet you try to maintain a semblance of normalcy, for Osamu.

But the close proximity—shoulders brushing, hands fleetingly touching, eyes meeting—heightens the tension between you. Your heart races uncontrollably, and shivers travel down your spine, each sensation a reminder of the internal struggle between your morals and instincts.

Atsumu, everso selfless, extended an offer for you to stay at his apartment. It was a gesture of goodwill, though it now feels like an unexpected complication. No one anticipated his behaviour would spiral this much, especially after the plans had been made. Your parents, trusting their children, hoped that Atsumu would have matured enough and that staying at his place would be more comfortable for you. They assumed you were busy enough with your studies and the hassle of flying back home to Japan that they simply decided for you weeks ago.

But as the door to Atsumu’s apartment clicks shut, the reality of the situation settles in. The safety of this space, the sanctuary you hoped for, now feels like a fighting ring where the unresolved tension might only grow.

Atsumu carefully guides you to your room, setting down your luggage, while repeating the same sentence over and over in his head: “Let her in and leave, lock your door, go to sleep.” Yet, as he turns to face you, his presence looms over you like a storm, his hands grazing your neck with a possessive, almost reverent touch, as his eyes lock onto yours.

“Who?” he asks again, his voice a low, dangerous murmur that sends shivers down your spine.

The blockers you’ve relied on falter under the overwhelming force of his scent, a potent mix of spice and raw desire that fills the room and stirs something deep and primal within you. You try to form a coherent response, try to remember the name of your partner, but your mind is consumed by the intoxicating presence of Atsumu. Each breath you take is thick with his scent, and you find yourself struggling to maintain a shred of rational thought.

Your attempt to explain dissolves into a stuttering mess, and all you can manage is a pathetic, “Not you.” The words escape your lips as a weak, desperate whimper, and Atsumu’s reaction is immediate and intense. A guttural groan of frustration erupts from him as he seizes your hips, pulling you roughly against his chest. His powerful arms encircle you, creating a cocoon of warmth that feels both incredibly comforting and alarmingly suffocating.

You can’t deny the wave of relief that washes over you as his scent engulfs you, blending with your own and heightening the undeniable ache between your legs. The slickness pooling in your panties is a blatant testament to your arousal, and Atsumu’s keen senses pick up on it immediately. His fingers dig into your body with a possessive urgency that makes your head spin.

A mental war rages within you: the clear, rational part of your mind screams that this is wrong, that your relationship with Atsumu is taboo and fraught with complications. But it’s overpowered by a darker, primal greed that drives you to clutch at him with a fervent need. You can’t ignore the way your body responds to his touch, the way every fibre of your being craves him despite the guilt and confusion clouding your thoughts.

Your arms wrap around his neck, pulling him closer as your lips brush against his neck. A desperate plea slips from your lips, echoing a longing you can no longer suppress. “Alpha…”

Atsumu’s groan vibrates through your body as his lips trail down your jawline, a possessive hunger that makes your knees weak. His tongue flicks over your scent gland, marking his claim with a rasping, “Mine, always been mine.” And it all gets too much for little you. Tears stream down your cheeks as you plead, “Tsumu… please…” Each cry is a mix of desperation and guilt, torn between what you know is wrong and the overpowering need within you.

“You’re telling me you belong to someone else? Yet you beg for me,” he speak lowly into your ear. As his sounds and murmurs fill your ear, the boundaries of right and wrong blur, leaving you surrendering to Atsumu’s fierce desire. His hands grip your waist with a primal hunger, the scent of desire thick in the air as he towers over you.

You shake your head, incoherent cries escaping your lips. “Just you… Ever always… Tsumu… Yours…” Atsumu’s breath hitches as he nips at your neck, his canines grazing your skin with a tantalising edge that sends shivers down your spine. The primal need within you breaks free, overwhelming your morals.

His erection presses against your tummy, the scandalous sensation causing a moan to escape you. You arch your body, craving the heat and pressure only he can provide. Atsumu’s grip tightens, fingers digging into your flesh as he revels in your response.

“Good omega,” he growls, his voice a low rumble that vibrates through you. His hands explore your body, tracing your curves before sliding under your dress to caress your bare skin. Every touch is electric, fueling the fire between you.

When his fingers brush against your damp panties, Atsumu’s leans closer, his breath hot against your ear as he whispers, “You’re mine, every part of you.” You moan in reply as his touch makes your body tremble, his weight pressing against you with a throbbing intensity.

“Please…” you beg, grinding against him, seeking more friction. “Tsumu… I need…” The energy almost driving you to come undone already, each touch overwhelming your self-control.

Atsumu’s movements are motivated by an insatiable need, his rough hands unrelenting as he pushes you onto the bed. “I need you,” he utters, his voice thick with desire. Your heart pounds, anticipation and desperation spiralling out of control as he undresses, his clothes hitting the floor in a blur. The raw need coursing through you is almost unbearable, each second that passes intensifying your craving. His every movement is a tease, a promise of the release you’re aching for, and your body trembles with a desperate hunger that feels as though you need him to survive.

He tears away your dress with frantic urgency, his lips scattering kisses across your exposed skin. “So perfect,” he murmurs into your skin, his breath hot and ragged. His touch ignites a fresh wave of need as his lips trail down your collarbone, his fingers finding the hem of your panties and stripping them away with fervent determination. “Tell me what you want,” he demands, his voice a low rasp.

When he finally tastes you, his tongue exploring your core with hungry abandon, each lick fuels the fire within. “More,” you plead, “Please, Tsumu, more!”

He hums in approval, swearing to himself to give you everything you crave. As he positions himself between your thighs, his body presses against yours with an intensity that leaves you breathless. Atsumu’s breath comes in ragged bursts as he looks down at you, his eyes dark with an almost feverish desire. “Maybe I should just fuck you senseless,” he muses, his voice thick with hunger. You whine in need, your body trembling as you practically drool over the sight of him. His slightly too-big cock rubs teasingly against your folds, each friction sending jolts of pleasure through your core.

“Gonna fill that sweet little cunt with my cum…” he groans, his words a sultry promise as he coats himself with your juices. Without any further preparation, he pushes into you. The stretch is overwhelming—too much, too good, too painful, yet just right. It’s as if he belongs inside you.

Your body arches instinctively to meet him, a desperate cry escaping your lips as you revel in the sensation. The connection between you both is undeniable, and with each inch that he sinks deeper, you’re consumed by the desperate need that has built up between you over the years.

Atsumu moans in response to your cries, his voice a low growl. “Breed you all day long, fuck…” he continues, his words a promise of unrelenting passion. He pauses for a moment, his hand gripping your hip tightly to hold you in place. The tip of his cock presses deeply into your fluttering walls, each thrust reaching parts of you that make your body shiver.

“Not already coming from just this, are you, baby?” Atsumu growls, his breath hot against your skin. His voice is laced with a mix of teasing and hunger, the edge of possessiveness clear in his tone. When you nod, your soft mewls send shivers through him.

Your arms tighten around his neck, pressing your face against his warm, soft skin as you beg, “Please, plea—ah, take care of me.” Your desperation is punctuated by those pathetic little whimpers, a level of need that drives your Alpha absolutely insane.

Atsumu pulls out of you momentarily, his gaze locked on yours. He groans, “‘Course I will,” before his hips snap forward again, plunging into you with a relentless force. Each thrust is driven by years of pent-up frustration and need, every motion filled with unfiltered desire.

You writhe beneath him, consumed by an overwhelming urge for his bite, his cock, his knot. You crave to be filled to the brim, your body yearning to be stretched and stuffed until you're perfectly round and swollen. “Tsumu” Your voice is desperate, barely recognizable as your own, laced with need. “I'm breeding your sweet little cunt and you’re going to take every. single. drop.” With the last words he already thrusts harshly into you. Big hands claw into your waist, forcing your body to arch helplessly as he dominates you. His thrusts are deep and relentless, each powerful movement making the fat of your ass jiggle. “Such a good bunny…” Atsumu groans, his voice dripping with possessive satisfaction.

“Now, come for me,” Atsumu commands, his gaze fixed on your quivering form. “Come all over me.” Desperation claws at you as you seek your release, your weak hands scratching at Atsumu’s back, leaving red streaks that burn on his skin. Legs spread wide for your alpha, your breasts bounce with every forceful thrust of Atsumu’s hips, connecting with yours in a delightful rhythm. Pleasure clouds your mind, reducing you to a chant of his name, each utterance a desperate plea.

Atsumu's mind roars with need as he looks down at you. He wants to mark you, claim you completely, and breed you. Now that he has you beneath him, he is determined to savour every moment, to ensure you are utterly his. He wants to see you drunk on his cock, to take care of you, his darling omega, until all but him is forgotten.

Atsumu feels you clenching around him, your tightness pushing him to the brink. “Just like that, good girl,” he groans, his voice rough with need. “You’re gonna make me cum.” The desire in his eyes is fierce as he thrusts deeper, the remnants of his control fraying with every movement.

With each powerful thrust, Atsumu's need to possess you grows. He envisions you marked, claimed, and filled by him, an unbreakable bond forged in this moment of passion. The rhythm of your bodies is a dance of primal desire, your cries of ecstasy blending with his guttural groans. The world outside fades away, leaving only the two of you, lost in a whirlwind of pleasure and need.

As you feel the peak of your release approaching, your body tightens around him, every nerve ending aflame with sensation. Atsumu's words, his touch, his presence, all coalesce into a symphony of desire that drives you over the edge. You tremble beneath him, your breaths coming in ragged gasps, your heart pounding in time with the rhythm of his thrusts.

You ache for him to release inside you, to fill you to the brim with the warmth you craved. The slap of his thighs against yours, the wet, frantic noises, and the erratic breaths all that fills the space between you. His strong scent envelops you, mingling with your own, as his fingers find your clit, rubbing with a relentless rhythm. The pleasure is overwhelming, stars exploding behind your closed eyes, your mind unable to grasp anything but the ecstasy he is giving you.

Atsumu’s chest presses heavily against you, a constant reminder of his dominance. “Don’t ever forget—” he rasps, his grip tightening on your hips. “That pretty cunt… these perfect tits… every damn inch of you belongs to me.” His words were a possessive threat, a vow of ownership.

He has you, his delicate omega, completely at his mercy. He's never going to give you away again. He feels high thanks to the way you unravel beneath him, turning you into a trembling, sobbing mess, overwhelmed by the intensity of his touch and the sheer force of his desire.

In that moment, you both reach the pinnacle of your desires, your high-pitched moans intertwining with Atsumu's deep, guttural ones. And he fills you so deliciously. Atsumu’s knot swells, pressing tightly inside you as he fills you with his cum. Each pulse of his release sends waves of ecstasy through you, making you feel as if you’re on the brink of losing yourself. His teeth bite down on your neck, and the stinging sensation sends lightning to course through your weakened frame, chiselling your bond in stone. It feels as though the world has narrowed to just the two of you, your bodies entangled in a state of perfect, overwhelming bliss. “Mine, all mine...” the hushed promised whispered into your nape.

As the sensations finally begin to recede, you drift into unconsciousness, the warmth of sleep enveloping you and providing a hazy escape from mistakes made in the dark.

#cw dark content #cw omegaverse #cw stepcest #cw breeding #cw knotting #cw blood #cw obsession #cw incest #cw cheating #about.atsumu #aki will always be my waif as well <3 #cw dubcon #haikyuu omegaverse #alpha atsumu

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