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Moving to Tokyo as a single omega dad of a seven-year-old wasn’t going to be easy. Atsumu was aware of that when he decided that his life needed a drastic change, but he wasn’t prepared to deal with a crush on his new next-door neighbor, Sakusa Kiyoomi. It happened against his better judgment, but it was hard to remain unaffected when Sakusa took such great care of his daughter– and it didn’t help that Sakusa was startingly attractive.
Atsumu couldn’t help but let his gaze linger on the expanse of Sakusa’s broad shoulders, across his strong back and arms and then down to his narrow waist each time he brought Akiho next door to spend the afternoon with ‘Omi-san’. Often, as he watched Akiho excitedly start to tell Sakusa everything that happened at school, Atsumu wondered how he’d gotten stuck in this predicament to begin with.
The first time Atsumu knocked on Sakusa’s door was out of necessity. He had been called in for an impromptu job interview at the local high school to work as the volleyball team’s coach, but Rin was out of town for an away game and Osamu could leave the new Onigiri Miya branch unattended only for so long. Leaving Akiho home alone was out of the question, so Atsumu did the first thing he could think of. His hands were clammy as he knocked on his neighbor’s door– he had little to no hope that a stranger would be okay babysitting his pup, especially on such short notice, but it was Atsumu’s best shot.
Atsumu had heard of his neighbor from other residents. Atsumu had heard about the man’s cutting tongue, unwavering stares, and prickly attitude, but everyone sure failed to mention how handsome the man was.
A tall frame stood in front of him– taller than him, not by much but just enough that Atsumu had to flick his eyes slightly up to meet the man’s dark eyes. Atsumu had been a bit apprehensive, given the many unfavorable rumors he’d heard about Sakusa. Still, something in the way the man’s gaze softened once it landed on Akiho eased his nerves. Besides, it’d been hypocritical of him to judge Sakusa based on frivolous rumors, considering that Atsumu always had his own reputation to deal with back in Hyogo, even before presenting as an omega.
He came home to find Sakusa with colorful hair clips in his curls pretending to take a sip from a tiny bright green plastic mug, his little finger raised to mimic royalty and all, while Akiho poured imaginary tea to the plushies and dolls sitting around the coffee table.
Later that evening, as Akiho started to clean up after herself, Atsumu apologized profusely to Sakusa, who assured him it was alright.
“She’s a delightful little pup,” he said, the colorful clips still in his curls, “I wouldn’t mind looking after her if you ever were in need again.”
It was meant to be a one-time thing and Atsumu hadn’t planned to take Sakusa up on his word but the improvised ordeal ended up working out so much better than expected that, after a handful of weeks of Akiho asking him to walk her over to Sakusa’s apartment so that she could show him her drawings, or how she organized her village on Animal’s Crossing, or literally anything else she wanted to show off, Atsumu caved.
Sakusa has been looking after Akiho three times a week for the last couple of months, free of charge despite Atsumu’s complaints. Sometimes Sakusa came over, and other times Atsumu brought Akiho next door, and as time slipped by, Atsumu couldn’t help but grow fond.
Sometimes, Sakusa would be braiding Akiho’s hair as she did her homework, occasionally asking questions, other times Atsumu would find Sakusa lying on the couch with Akiho starfishing on his chest while he read to her. They made a cute picture, one that Atsumu enjoyed a bit too much to come home to.
“Ye’r not even gonna come say hi to yer dad?” Atsumu called out, taking off his shoes.
“I’m comfortable here,” she replied, nuzzling into Sakusa’s chest, and Atsumu wondered how childish it’d be to be a little envious of his own kid.
“I can see that,” Atsumu sighed, feeling his lips tugging up, “but come on now, it’s time to let Omi-kun go.”
“But daaaaaad,” Akiho pouted, her grip on Sakusa’s shirt tightening. Sakusa chuckled at her antics, “Two more pages little hurricane, then we’ll do as your dad says. How does that sound?”
Sakusa looked at Atsumu, the question directed at him rather than his daughter, though she didn’t pick up on it and pouted in response. Atsumu nodded. It was becoming increasingly hard to separate her from Sakusa.
Atsumu walked to the kitchen while Sakusa’s voice filled the silence– he had a nice voice, so it was no wonder that Akiho enjoyed listening to him reading stories to her. It left Atsumu wondering how it’d sound in other scenarios, but he quickly pushed those thoughts to the back of his mind before his imagination could affect his scent. Akiho was too young to pick up major changes in people’s scents– Atsumu wouldn’t have to worry about that until she presented– but Sakusa could.
Sakusa’s subgender was another dilemma. Atsumu was still trying to figure it out, but the fact that the man religiously wore scent blockers narrowed the options down to two. Betas hardly had a scent to cover up, so that left alpha and omega on the table. Sakusa certainly had the looks of an alpha, but looks can be misleading– Atsumu himself is often mistaken for an alpha until people get a whiff of him.
He’s tall, muscular, and strongly opinionated as a well-behaved omega shouldn’t be. Sakusa could be just like him. He tried asking, as subtly as possible, other residents but none had a definitive answer, only more personal opinions and speculations, and Atsumu himself couldn’t pinpoint a subgender for Sakusa either– the man’s home was always immaculately clean, devoid of any particular smell that wasn’t laundry detergent and bleach.
To distract himself from inappropriate thoughts, Atsumu started to think about what he could make for dinner with the limited supplies left in the fridge– he was supposed to go grocery shopping the day before but Akiho came to him with her eyes wet with tears and they ended up cuddling in his nest, watching her favorite movies until she felt more like herself again.
It always broke his heart to see her like that.
It was one of the reasons he decided to leave Hyogo– they both needed a change of scenery, and the many new stimuli helped both of them not think about Akiho’s mother leaving them. Sakusa entering the picture only boosted the improvement.
To his surprise, the fridge was fully stocked.
Atsumu looked over his shoulder, finding Sakusa’s gaze already on him. His heart sped up, beating in his chest like it wanted to escape the bars of his ribcage.
Sakusa being incredibly attentive wasn’t helping his case. The man’s apartment was always warmed up since he quickly realized Akiho ran a little cold, he had stocked up on Akiho’s favorite snacks, and knew exactly how to handle her whenever she got overstimulated– but those attentions didn’t stop at his daughter.
When Atsumu wasn’t coaching, he helped out at Osamu’s restaurant. He’d bring Akiho with him, leaving her to play in Osamu’s office while he served the tables or delivered takeout when needed, and to say he was drained by the time he came home would be an understatement. Yet there was always a warm meal waiting for them in the kitchen, a note alongside it where it listed the dishes and a reminder to take better care of himself. His eyes stung the first time this happened. Now his fridge had been stocked to the brim.
It did things to Atsumu, though was inconvenient, to say the least, because there were instances where Atsumu’s resolve almost slipped.
A couple of weeks ago, the three of them were in the elevator. Atsumu was about to go to work while Sakusa and Akiho were going out to play in the nearby park, his daughter excitingly telling them what her plans were when the elevator stopped on the third floor to pick up some other people. It was a small group of college students, not much younger than Atsumu himself, blasting their scents everywhere with no regard for the people around them, and like the little brats they were, they made no effort to hide their stares.
Atsumu was no stranger to picking up fights, but he had to swallow his remarks. He firmly avoided running his mouth when Akiho was around. There was no way he’d put her in danger, especially not for a few meaningless judging looks. Still, an instinctual part of him, his inner omega, felt the sting anyway.
As the elevator’s door began to close, Sakusa shifted to stand in front of him, maneuvering Akiho gently to stay between the two of them. Atsumu found himself stuck between a corner and Sakusa’s body, facing Sakusa’s chest, which was accentuated by the nice, fitted sweater the man was wearing.
His heart skipped a beat before beginning to thrum loudly in his ears. Atsumu reminded his inner omega that the space wasn’t much to begin with in the elevator, and with the addition of three more people Sakusa had nowhere else to go. His logical reminder was of no help as his inner omega was convinced that Sakusa was protecting him and his pup, shielding them from unwanted attention. To make things worse, Atsumu was the perfect height to be at eye level with Sakusa’s neck. He wanted nothing more than to take off those offending scent patches and dip his nose in the crook of Sakusa’s neck, getting the men’s scent all over himself.
Atsumu knew he had to snap out of it before he did something stupid, but looking away didn’t make things better. Sakusa’s gaze was intense when Atsumu’s eyes found his, and that’s when he realized just how close Sakusa was. If it weren’t for the face mask Sakusa was wearing, Atsumu could have felt the man’s breath fanning his skin. Neither of them spoke a word, Akiho filling the silence for them, but Atsumu could hear none of it.
Just for a second, Atsumu saw Sakusa’s eyes drop to his lips. It was only his imagination. Atsumu repeated that sentence in his head over and over, but despite that, he only realized he was leaning forward when the elevator spoke ‘ground floor’, halting.
Air rushed to his lungs as soon as Sakusa stepped away, taking his body’s warmth away with him.
It wasn’t the first time that Atsumu felt this pull towards Sakusa, and it wasn’t the last, but it was certainly the one that stuck with Atsumu the most, the one that he found himself dreaming about.
Still, he refused to do anything about it– Atsumu liked what they had now, the routine they’d created, and Akiho was happy, happier than she’d ever been since her mother left.
“Omi-kun?” Asumu called out when the snap of a book pulled him away from his thoughts, “Would ya like to stay over for dinner?”
Not only did he not want to unbalance the scale of their newfound tranquillity, but what if Sakusa was an omega? No way an alpha would ever be this attentive. Not with a pup and not with an omega like him. Atsumu didn’t care for subgender, but if Sakusa was an omega, then who’s to say that he’d be interested in other omegas?
“No!” Akiho shouted and that– well, that was surprising. Both him and Sakusa looked at her while she unceremoniously said, “Dad, I love ya, but uncle Samu inherited all of grandma’s cooking skills.”
Atsumu almost choked on thin air while Sakusa stifled a laugh.
“I am a decent cook!” Atsumu said, but to his dismay, his daughter didn’t look convinced at all.
“I can make something quick,” Sakusa suggested, “you’ve worked enough for today, Atsumu.”
Akiho looked ecstatic as she glanced over at him with pleading eyes.
“Ya’ve done enough Omi-kun, really, we can order take-out–” Atsumu could barely hear his own voice over the pounding of his blood in his ears. Sakusa insisted, and they ended up having a wonderful evening together.
No matter how strong he felt this pull towards Sakusa, he just couldn’t risk it.
Still, Atsumu was grateful for Sakusa so when the man texted him that he couldn’t babysit Akiho for the following week, he knew he had to repay the man somehow.
Atsumu planned ahead, and luckily, this time, Sunarin was around so he could leave Akiho to her uncles before preparing an omega care bag for Sakusa to help him through his heat.
“Omi-kun! I brought some stuff for yer…” Except that, when he knocked on Sakusa’s door, it wasn’t the smell of an omega in heat that greeted him, “...heat.”
Atsumu barely finishes the sentence, his breath knocked out of him by the earthy scene of an alpha in rut.
Sakusa, for once, isn’t wearing his scent patches, and Atsumu feels his head swim and his stomach twists pleasantly from the intensity of Sakusa’s scent. For a fleeting moment, Atsumu realizes that it makes sense– it makes sense for Sakusa to be an alpha. Thinking back, Sakusa did nothing but provide for him and Akiho in the past couple of months.
Without even realizing it, the care package he was holding fell to the ground.
“You shouldn’t be here,” Sakusa says, his voice rough and strained.
The sound brings his attention back to the tall, broad figure standing in front of him– Sakusa is disheveled, his knuckles are white with how strongly he’s holding on to the door frame, his breathing is hard and his face red. The redness doesn’t stop at the alpha’s face, and that’s when Atsumu registers that Sakusa is bare-chested in front of him, only wearing some gray sweatpants that do nothing to hide his…state.
Atsumu can’t be blamed for his body’s natural reaction. Sakusa inhales sharply, immediately picking up on the scent of his slick, the alpha’s pupils dilating and his scent thickening– it goes to his head, makes him feel dizzy, and Atsumu has to hold on to all of his resolve not to drop on his knees and bare his neck to the alpha.
The alpha curses under his breath, quickly starting to close the door in Atsumu’s face. His body moves faster than his mind can think, blocking Sakusa in the intent of shutting him out.
“I can help,” he hears himself saying, and finds that he doesn’t regret his words. Sakusa’s gaze snaps, the alpha’s dark eyes finding his. Atsumu feels pinned by the intensity of it, by the predatory hunger that shines in Sakusa’s eyes, and likes it– he wants to know what it feels like to be pinned by Sakusa’s body instead.
“Let me help.”
Everything spins a moment later– Sakusa moves so quickly that only when he gets crowded against the door and a guttural, almost pained, growl echoes in his ear, Atsumu realizes that he’s been pulled inside the alpha’s apartment. Right into the den of an alpha in rut.
“You don’t know what you’re asking for, omega,” Sakusa says, his voice rough against the sensitive skin of his neck, where the alpha’s sharp fangs hover right above his scent gland, “I would ruin you for everyone else.”
His blood thrums loudly in his ears as a thrill runs through his body and, like a spark, it sets aflame any weak inhibition Atsumu might have had.
Atsumu purrs, nipping the shell of Sakusa’s ear. “Is that a promise, alpha?”
It was the right thing to say. It set Sakusa’s alpha off, making Sakusa unable to keep his rut at bay any longer.
Sakusa kissed him like he wanted to steal all of the air out of his lungs, and Atsumu could only hold onto the alpha’s broad shoulders and try to match Sakusa’s fierce kiss, to give back as good as he got.
The kiss is wet and hot and hungry . It would have been harder to keep up with it if Atsumu weren’t starving for it. Though they’re just about the same size, Sakusa surrounds him– the alpha is pressing his body against his, his heady scent is everywhere . It’s like a drug, one that dulls his reason and pulls his instincts forward.
His nails dig into Sakusa’s back, hoping to leave marks on the alpha’s soft skin, his inner omega eager to take, take, take, and the next thing Atsumu knows is that his feet aren’t touching the ground anymore. Wrapping his legs around Sakusa’s hips, Atsumu clumsily humps the alpha’s groin, moaning into the kiss when his cunt rubs against Sakusa’s hardness.
Sakusa growls, his hand cupping Atsumu’s pussy from the back, and his long fingers press over his clothed hole. Atsumu hates the fabric separating them and loses his shirt along the way before being unceremoniously dropped onto Sakusa’s bed.
Running on pure instincts, Atsumu flips on his belly. His face rests on the mattress as he spreads his knees apart and arches his back, pulling his sweatpants and underwear down his thighs to present his throbbing, slick glistering cunt to Sakusa.
It’s not his favorite position, but it’s the most appealing to an alpha in rut.
Atsumu fully expected to be filled by an impatient, hormonal alpha, but instead, he was manhandled to rest on his back.
“I want to see your face when you come on my knot,” Sakusa says, taking off Atsumu’s sweats and throwing them on the ground before pushing his legs apart.
His pussy lips spread open, leaving absolutely nothing to the imagination and his face burns, but the prospect of being filled up makes him slick some more right under the alpha’s watchful eyes– to Atsumu’s surprise, Sakusa dips between his legs.
Atsumu is breathless, hands flying to grip the alpha’s curls as Sakusa’s tongue laps his soaked pussy. The alpha is desperate, Atsumu has half the mind to feel it in the way Sakusa grunts and groans as he eats Atsumu out, tongue digging between his folds just to taste his slick.
His own tongue is heavy in his mouth and there’s not enough oxygen in his lungs for anything other than breathy whines, but when Sakusa’s lips close around his clit and two of the alpha’s slender fingers slide effortlessly into him, a loud moan rings across the room.
It takes Atsumu a moment to realize that he made that sound, and it takes him even longer to realize that his eyes had shut close– only when Sakusa growls in response, sending shivers up his body, Atsumu opens them up, his blurry gaze finding Sakusa’s lustful one between his legs.
It’s then that Sakusa pulls away, the bottom half of his face glistering with his slick. Atsumu whimpers in protest, but the alpha crawls over him, adding a third finger just as he says, “See how good you taste,” and leans forward to capture his lips in another deep kiss.
Atsumu chases the taste of himself on Sakusa’s tongue, getting lost in it, getting lost in their combined scents, so much so that Atsumu doesn’t notice Sakusa getting ready to mount him until he feels the alpha remove his fingers and sheathe himself with a brutal thrust.
Atsumu gasps, breaking the kiss. Even with the prep, the stretch stings and tears start to wet his eyelashes. He feels so full, and if the alpha hadn’t started to fuck into him like he was nothing more than a glorified cocksleeve, fucking every coherent thought out of him, then Atsumu would have bragged about Sakusa’s knot being half-inflated just for eating him out.
Sakusa ravishes him, his lips and teeth chasing every exposed, unmarked shred of Atsumu’s skin, hands gripping his hips tightly to keep Atsumu still. As if Sakusa wasn’t pounding him into the mattress, as if Atsumu was planning to go anywhere.
“Ah, ahhn,” he whimpers, each sound punched out of him by a hard thrust, “ Om–mmh, ah, Omi! ”
Atsumu could swear he could feel Sakusa’s cock in his throat with each snap of his hips.
“You can do better,” Sakusa says in a low voice, “Try again.”
A cry wobbles out of him– everything feels too much and too good, his muscles tensing up under Sakusa’s firm body and insistent thrusts, then Sakusa grinds his cock deep inside of him and presses a hand on his lower stomach and Atsumu sees white.
“Alpha!”
Sakusa pushes deeper, the sound coming from the alpha’s lips is low and wild and makes Atsumu tense even more– his pleasure is pooling lower, quickly riding up to the edge of an orgasm, and he grips the alpha’s shoulders tighter as if that’ll help him find a semblance of balance.
“Your pretty little pussy belongs to me now,” Sakusa grunts, voice barely recognizable, the only other thing that he can hear is the squelching sound of his obscenely wet cunt and the bed creaking under them. “ You belong to me now.”
The tension in his muscles snaps and his body shakes with the force of his orgasm. Atsumu clenches around Sakusa as he comes, sucking him in as a copious amount of slick gushes out of him, making a mess of the alpha’s groin.
Sakusa pulls away from him, Atsumu missing his body heat as soon as it’s gone, and grabs the back of his thighs to push them closer to his chest, so close that Atsumu is folded in half and can only lie there, on the mattress, taking it, even as overstimulation seeps in.
“Such a good omega for me,” Sakusa says, looking down at him, his hair a mess and cheeks a pretty shade of pink, his thrusts getting sloppier and more frantic, “Fuck, I’m going to breed this pretty pussy of yours, fill your womb and make you round with my pups.”
The suggestion makes Atsumu’s body react, a new wave of spasms going through him, and that’s what Sakusa needed to trip over the edge of his own climax.
Sakusa presses over, and it is almost hard to breathe with Sakusa’s weight fully on him, and yet Atsumu goes boneless as he’s rocked back and forth by the alpha’s final thrusts. His pussy grips Sakusa’s knot tight, milking his orgasms until the alpha gives one last weak growl and finally stills.
Feeling even more full than before and with his alpha’s cum safely kept inside of him, Atsumu unconsciously begins to purr. “Good alpha, stuffing me full of your cum,” he says, feeling Sakusa’s cock kick inside of him, “So good for me, Omi.”
Atsumu tries to catch his breath as Sakusa begins to scent him– he doesn’t think he can feel his legs, and he’s still dizzy, and he thinks even his soul has been fucked out of him.
He has a long week ahead of him– not that he’s complaining, especially if it means that he gets to keep Sakusa once the pheromones go down and, perhaps, if it means that he isn’t going to be a single father for much longer.