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Yuuji groans as he blindly reaches for the source of ringing, tapping the bottom of his phone screen with a heavy hand. Despite turning in early, fatigue still clung to him, it took a monumental effort to not fall back into the sweet embrace of sleep. Instead grabbing his phone to check the time, hoping the bright light would aid his efforts as he looks through his notifications.
The first year isn't usually this slow to wake, but he isn’t too keen on getting up and feeling an intimate reminder of the last few days. He especially refuses to acknowledge the sudden heat along his ears and nape at the thought.
Anyways, sleeping in his own dorm feels almost weird after days of staying over at Gojo’s despite the rules against staying past curfew. But when the alpha had insisted on extended skinship outside of sex Yuuji didn’t have a strong argument against it, especially since it wasn’t the most outlandish request that's been made since coming to their arrangement.
Thinking back it was unsurprising how easily he gave in despite his reluctance, even now the thought of finally possessing pheromones and forming a mating bond with Geto-senpai makes it all worth it. The initial queasiness and moral anguish of sharing his firsts with anyone other than Geto let alone his best friend were instead acknowledged as necessary sacrifices. Regardless of his trepidation, the spoiled young master wasn’t going to let his generosity be denied.
In spite of the unusual layer of their companionship, it wasn’t terrible spending basically all his free time with the prime alpha. Outside of the hiccups in their relationship leading up to the present, Yuuji genuinely did like his senpai despite his difficult personality. It was him after all who offered to aid in Yuuji’s transition, the least he could do was make time to cuddle.
The teen hissed as pain shot up his spine, the dull ache flaring and turning his movements jerky once the need to pee got overwhelming. His sturdy body had been put to the test by an overeager alpha the past few days. Gojo wanted to indulge before a handful of missions that were supposed to take a few days. Even with his inhuman strength Yuuji was still just a beta, anatomy ill suited for an alpha, let alone a prime one. But if all goes to plan, that will no longer be a hindrance.
Having no missions himself it would be a rest day, attending class, and if Kugisaki wasn’t going to bully him and Fushiguro into going shopping, relaxing in his dorm. There the beta would likely spend the remainder of his day catching up on manga he’s been putting off, maybe a nap since he’s been feeling tired the last few days. Normally, Yuuji wouldn’t be so keen on lazing around so much but given the extensive workout his senpai put him through, it feels like a necessity.
He yawns obnoxiously as he flicks on the bathroom light, catching a glimpse of the damage his senpai had done to his chest. He’d have to put bandaids on them again, puffy areolas much too sensitive to have the fabric of his uniform rubbing against them. Among the many things Gojo was adamant on was marking, especially prominent scent glands, namely neck and inner thighs, claiming the extra stimuli would help in his transition. While Yuuji is grateful for the extensive research his senpai had done, he put his foot down on the placement of the marking regardless of the alphas whining. Nowhere he couldn't easily hide them under a hoodie was prohibited, in retaliation Gojo made sure he left Yuuji looking like he was attacked by an octopus most if not every time they did it. This time was no different, much to Yuuji’s dismay.
Feeling more lively after his usual routine he meets up with Fushiguro in the hallway so they can head to class together. The morning air was crisp as it filled his lungs, Yuuji enjoying the birdsong and the warmth of the sun as it peaked through the dense clouds. It smelled like it was going to rain.
“You’re limping.”
Fushiguro suddenly spoke, sparing a sideways glance from his phone. Yuuji had thought he’d been hiding it well,
“Hah, ye—ah,” Yuuji scrambled to find an excuse as he rubbed the back of his neck, “I guess Satoru-san got a little rough during training…”
“So you and Gojo are friends again,” a faint crease between his brows as he side eyed the flustered beta. He tactfully ignored the use of the third year’s first name, which Yuuji hadn’t realized let slip until it was too late. Initially, after their fight he had been too shamefaced to explain the sudden avoidance of the alpha, fortunately the two were more than eager to finally rid themselves of any unnecessary interactions with their no good senior.
Yuuji nods with an innocent smile, Fushiguro shoots him an unimpressed look before rolling his eyes and dropping the topic. If his peer wanted to spend his time with an irritating alpha then he better leave him out of it.
Luck seemed to be on his side this morning as Nobara hadn’t been in the mood to reiterate how stupid he was. Just like always, no one else spared him a second glance. The beta was able to relax for the first time since their arrangement began, not having to deal with his senpai hanging off him during free periods. Which was something Gojo had done before except now it felt like there wasn’t a moment he could have for himself. Even for someone as tactile as Yuuji, he was feeling a little suffocated.
The contact was innocent enough, really it just seemed that his senpai wanted to be in his personal space. Always needing to crowd against the first year, eager to scent mark despite Yuuji’s protests. The beta worried about smelling like the prime alpha, not wanting people to jump to conclusions. Despite Yuuji’s reservations, Gojo was insistent on pushing his boundaries.
The beta could only assume it was an instinct that couldn’t be helped, after all it made sense for an alpha to dote on their pack mates. Yet there are times it felt more like Gojo was treating him like a mate, which wasn’t ideal for a multitude of reasons. When the beta had tried to set solid, clear cut boundaries the prime alpha had grown emotional, long lashes clumping together with tears that threatened to fall as hurt turned his unearthly beauty tragic.
Yuuji had been entirely blindsided by the pitiful display, having prepared for a spat should the alpha brush his concerns off like he’d done many times before, he was utterly defenseless. In the end, the beta was the one who apologized despite his initial plans. Going as far as nuzzling against the alpha’s ruddy cheek like a proper omega would when consoling their mates and puppies, even if the movements were unpracticed and a little stiff, Gojo had been elated with the act.
One thing that was quickly realized early in their relationship was this: when Yuuji gave an inch it was guaranteed Satoru would take a mile.
Since then the alpha was committed to convincing the first year to act more omega-like, claiming it would aid in his transition.
“There’s been loads of psychology research about this, the biggest obstacle to change is the mind,”
“I guess that makes sense…”
“Of course it does.”
Omega-like behavior obviously didn’t come easy to the beta, so his first attempt at a nest was clumsy and a little awkward. Especially with someone watching his every move like a hawk, with no better idea Yuuji ends up making a border of blankets on his senior’s bed.
His efforts are rewarded with the weight of a happy alpha smothering him into that very nest. They spend the rest of the day snuggled up, with the alpha heavily scenting him while he purrs like a motor. Yuuji ends up falling asleep, all warm and content.
…
Yuuji’s mission had been completed faster than the train there, all that was left now was to write a report and have it delivered to the window as soon as possible. Given the layer of sweat coating the beta after running around an abandoned clinic it was inevitable that the teen would need a shower. Unfortunately, what should’ve been a straightforward task is derailed by a familiar presence. Yuuji has grown used to his senpai’s antics by now, yet he still finds himself inwardly sighing when his path is cut off by a needy alpha, “Yu-uji! Come greet your senpai like a good Kouhai~”
“Ah, hey Satoru-Senpai!” The first year smiles warmly, the sight never fails to cause an eruption of butterflies within the third year. Suddenly full of more energy than he could handle, Gojo swoops the beta into a bear hug as he jostles his adorable Kouhai side to side.
“No! I’m all gross right now, put me down,” even as he complains, the alpha continues to smother him. Embarrassed at the thought of someone smelling his BO, Yuuji braces his hands against broad shoulders and attempts to reel back. Of course, he doesn’t budge an inch from where he’s pressed close to Satoru’s clothed clavicle. Instead he’s lifted to the tips of his toes so Satoru doesn’t have to strain his lengthy body to shove his face past a red hood and directly against the juncture of his junior’s neck where the sweat had cooled during the ride back.
“Ack! Senpai!” Mortified, Yuuji increases his struggle, he stills upon feeling the low growl vibrate throughout his body from where their chests are touching. His already racing heart skipping a beat at the display of dominance, even a beta like him doesn’t stand a chance against an alpha of his caliber. Yuuji relents his struggle for a moment due to shock and allows his senpai to do as he pleases.
Nullified by his submission, Satoru goes back to huffing against his sweaty neck. A quiet purr rumbling in his chest as the uncomfortable ache due to their separation finally settles and he happily sighs.
“Hah, I can’t take it anymore,” the alpha groans miserably, “let’s head to my dorm I want to do it.”
Not even waiting for a green light, he warps, the two of them suddenly in the comfort of the alphas den. Satoru wastes no time laying Yuuji in their nest, which is looking much more cozy since the addition of blankets and pillows completely soaked in the alpha’s pheromones.
“I really need to shower first!”
“No, I like your smell,” shoving his face into Yuuji’s clothed crotch, making the first year begin to thrash in a panic. Easily subduing any attempt to buck him off the alpha basks in the humid air come from the apex of Yuuji’s thighs. A heady mixture of boyish musk and pungent sweat that has his mouth watering and thoughtlessly grinding his half chub against the bed. Only Yuuji could get him worked up so quickly.
The beta was beyond mortified as he shielded his burning face behind his arms, having been man handled in going with his perverted senpai’s whims. Yuuji had to get stronger. This was getting ridiculous.
Satoru was addicted to anything and everything Yuuji, given that the beta was so meticulous about showering before sex the alpha was greedily taking his fill of his scent at its strongest. Passing whiffs during training were nothing compared to this, Satoru can’t help but moan as he takes another deep breath that coats the back of his throat so deliciously.
Mindful of the last scolding he got for literally tearing off Yuuji’s uniform in his haste, Satoru instead settles with roughly tugging both pants and boxers down. The smell no longer smothered by stupid clothes with sewn in scent blockers, the alpha is quick to reclaim his place between yuuji’s thighs. Taking advantage of his shock, Gojo flips him onto his stomach before lifting his hips for easy access for his reward after being so good.
…
Satoru laps hungrily at Yuuji’s puffy rim, no longer pink and tight like the first time he’d laid eyes on it, long tongue mapping each wrinkle that made up the furl before squeezing through the firm ring of muscle. Flushed face pressed between fleshy globes that do little to quiet the filthy squelch as the alpha vigorously swirls around the silky insides. Satoru was already so entranced with the beta’s taste, but the thought of sticky sweet slick and omega pheromones from the copious amounts of virile semen he’s fucked into him finally taking makes his head spin and growing knot throb hard enough to ache.
Yuuji writhed face down on the bed, still unwilling to let Satoru look at his face while he ravages his soon to be omega pussy. The older teen meanly sucks the slutty hole, earning a delicious squeal that only exasperates the buzzing beneath his skin, before sitting back to take in the fruit of his labor. He hooks his thumbs into the loosened ring of muscles, tugging to get an unimpeded view of slick fleshy walls that flexed and begged with such honesty that Satoru had to be a sadist to deprive such a hungry mouth for much longer.
Getting up to his knees he unbuckles his belt before nearly ripping the button off in his haste, sighing in relief once freeing himself. The waist band of his boxers shoved just beneath his heavy sack and he gave himself a couple strokes. Meanly smacking the shaft against the puckering hole, laughing breathlessly at the way his sweet kouhai flinches at the contact.
“Senpai…” Yuuji huffs impatiently.
“Heh, sorry sorry.”
Yuuji’s slutty hole practically sucked him in, the entire length wrapped snugly in a single thrust. The alpha doubted he would ever grow tired of the way his sweet junior’s soft insides greedily clung to his cock. It was no wonder how his high stamina that had left past flings exhausted by the time he climaxed, seemed to revert back to an overeager pup set to burst at the simplest touch. Especially since he’d been deprived the last few days so the meager tolerance he had built up was reset, this must be the sexual compatibility mates brag about all the time.
Despite his best efforts, he’s shamefully close to popping his knot. Six eyes entirely focused on the way the boy's rim stretches taught around the veiny length until bony hips meet meaty cheeks. Both groan, one in bliss the other with strain.
Being the kind senior he is, and maybe to wait out the telling tightening of his balls, Gojo allows the boy some time to adjust. Large hands caress sun kissed skin, feeling the way toned muscle quivered and shifted beneath his fingers.
“Hah…you’re so pretty like this, omega.” The alpha coos as he gets a solid grip of that slim waist and begins to slowly pull back. The base of his skull tingling at the way his omega’s pussy clings to his throbbing knot before tugging it free. Though he tries to be gentle the beta still lets out a choked cry, a part of him feels bad for hurting the sweet boy but that doesn’t stop him from pushing back into the base, partial knot and all.
This time Yuuji turns his face into a pillow and squeals like a girl, it’s so cute the alpha can’t help but be a little mean as he grinds his hips in a circular motion. He growls at the velvety friction while Yuuji snivels and limbs tremble.
Setting his legs and leaning over enough that forces his sweet omega into an obscene arch that accentuates the fat of his ass, Gojo begins a steady pace. Working that sloppy hole even more for an easier fuck, the mixture of lube and sweat has their skin sticking together in a way that only further stimulates as the teenagers lose themselves in the sweltering heat.
Yuuji’s blush has reached past his shoulders, his smaller body radiating heat the more the alpha leaned over him, subconsciously seeking more contact. It’s when Yuuji begins to grow uncomfortable with the position and attempts to squirm away that Satoru loses his grip and slips, he just as quickly catches himself. Slender waist now bracketed by veiny forearms, the alpha was basically crushing the poor betas prostate and breaching his colon. Gojo immediately tries to pull out but the new sensation sucking on the sensitive glands alongside the mind numbing pleasure of an orgasming pussy massaging the rest of him, he can’t move.
The sudden orgasm blindsides the beta, the pain of the deepest parts of him being forced open mixes with the almost nauseating pressure against his good spot in such a way that he cant help but wail into the pillow being crushed against his face. Toes curled so hard they almost cramp and eyes rolled back as choked moans filled the dorm, cum shooting onto the already ruined sheets. Balls flexing with each wave, it felt like endless agonizing bliss given how his alpha had yet to let up on the swollen gland.
The pleasure quickly grew overwhelming, the beta’s tender body being brutally tested once again as tears began to prick at his glossy eyes, Yuuji could hardly even beg for reprieve.
“S-sen—Satoru, pl-please, it’s too much—!”
“Oh fuck, omega,” Satoru groans as he begins to set a punishing pace in a single minded frenzy to finish. Heavy balls achingly full as they slap against Yuuji’s perineum, he forces his inflating knot in and out of that sloppy mess of a pussy. Only a few more thrusts before he’s wedged inside and being milked better than any omega hole, the fit is borderline suffocating even after all this time.
Satoru groans as his eyes roll behind his fluttering eyelids, extremities numbed as he pops his knot and finally empties his balls after such a draining work week.
The two take a moment to rest, catching their breath after such intense orgasms. Of course, being so young and virile, it doesn’t take long for Satoru to bounce back. Unable to keep himself from testing the give of his knot, unsurprisingly it’s a solid bind if the discontent mewl coming from Yuuji is anything to go by. He apologizes with a tender kiss against his sweaty temple before grabbing his chin and turning his head to share a languid but heated kiss.
“I can’t wait until your womb finally develops. You’ll look so pretty full of my puppies.”
‘There he goes again’ Yuuji thinks, the thought far away in the haze of his afterglow as he’s forced to stay presenting. Satoru refuses to let the beta settle on his knot, far too eager for another round. Yuuji just wanted to shower.
It’s a blessing and a curse when the alphas fat knot deflates, on one hand it eases the strain on Yuuji’s poor ass while on the other it means that small reprieve is over.
Switching positions, Yuuji is now on his back, hands struggling to grip the back of his sweaty knees. The alpha places a comforting hand against the back of his thigh as he indulges with barely pressing the head of his cock against the gaping rim once or twice before giving in to his cute omega’s irritated groans. The entrance is always easier after the first knot, Yuuji’s sloppy ass no different than a wet pussy.
The alpha is sure to express his vulgar thoughts, pleased with the way the boy's pink face goes several shades deeper. Balls deep once more, Satoru leans back enough to maintain a clear view of his cock entering Yuuji, he begins to thrust. Sighing content at the delicious friction, tearing his gaze away to instead watch the way his omega’s face contorts in pleasure pain. The fat glands drag against his swollen prostate that makes his legs twitch and jerk, Satoru kindly placing his other hand on the opposite thigh before curling them into a solid grip that had the meat bulging around his fingers to keep the writhing boy still.
Like this, with just the two of them in the comfort of their shared nest, Satoru can easily convince himself they’re mated. That they were making love. Any doubts are swiftly swept away when they interlock tongues and hands.
It isn’t long before the alpha is maneuvering the exhausted beta’s body back onto his stomach, Yuuji presenting so beautifully like a proper omega. Satoru sets a steady pace, dragging his pulsing length through silky wet insides as he rubs appreciatively along the globes of fat before him. His kouhai had a nice body, even with that baggy uniform and preferred style it was obvious.
To think that Suguru could’ve had this instead makes his chest ache and languid movements gain a sharp edge, punching out hiccup moans. He draped his larger frame along the length of sweaty skin and toned muscles, wrapping his arms around Yuuji so his arms were pinned and left him entirely at his mercy.
“Yuuji say my name,” the alpha begged, gnawing on his lover’s sweaty nape, relishing the salty flavor. Unable to get much leverage in their position didn’t let Satoru go as deep as he wanted, still his pace didn’t let up as he continued to rut against his favorite.
“Ah—Satoru-senpai, slow down puh-please,” Yuuji gasped as sparks of pleasure melted his brain, “S-Satoru—”
“Ah, Yuuji I love you—!” The alpha moans pathetically as his knot pops and he’s coming his brains out. Pelvis pressed as close as possible as his balls flexed and throbbed, his toes tingling and head spinning as he momentarily forgets how to breathe in his ecstasy. When Satoru finally can take a breath his lungs burn and his head throbs, he’s still shooting thick spurts of come into his mate.
His instincts grow stronger after such an intense knotting, Satoru begins purring as he gnaws and marks every bit of available skin. Nuzzling sweetly against a burning cheek, taking care to lick away the tear tracks and sticky sweat.
…
A part of Yuuji still felt like scum when he would stop and think about it, how he was basically using the best friend of his crush as a stepping stone. Even if Satoru had been the one who not only offered but insisted on this, it left a bitter taste in his mouth. Things only seemed to be getting more out of hand as Satoru began to have emotional outbursts. Sometimes bordering on a full blown panic attack, unable to feel Yuuji through their nonexistent bond.
The beta would have no choice but to console the distressed alpha, doing his best to coax him back to reality as gently as possible. The whole thing made Yuuji’s heart sink, genuinely debating if transitioning was even worth it anymore.
Then the fateful day came.
Waking up to a low grade fever with accompanying fatigue and body aches really should've set off alarm bells, instead Yuuji takes his temperature and decides some bed rest would do him good. Really, he should’ve known better all things considered.
As time passed his symptoms worsened, the fever and aches chipped away at his awareness until the beta was jerked awake by a mild but sudden cramp in his lower abdomen. Curled up and cradling his stomach he suddenly becomes aware of the fact he’d yet to drink or eat anything all morning. Yuuji’s throat is parched as a pitiful whine grates against it, he was so thirsty.
Somewhat delirious from fever and dehydration, the beta stumbles out of bed and into the vacant hallway to search for the nearest fountain. Dressed in nothing but briefs and a shirt Satoru had given him for his nest, he somehow shambles his way to the communal kitchen and downs several glasses of water before he’s satisfied.
The small clarity offered from the refreshing water was quickly overwhelmed, Yuuji had to get back to his dorm and get some more rest. It’s when he attempts to take another step does his legs suddenly give out and he barely refrains from collapsing onto the floor in a heap. Yuuji’s vision swims for a moment too long while he tries to shake the fog quickly settling in his mind. It’s as he attempts to make his weak limbs move does he realize just how aroused he was.
“No. No, not now.” He is beginning to panic when a pair of large black dress shoes step into his line of sight. Bleary amber eyes slowly follow the expanse of long legs up to the only person he could stomach to see him in such a vulnerable position. His racing heart slams into his chest as he watches Satoru inhale deeply through his nose and mouth, like he was coating his palette with the smell of desperation.
“Knew I wasn’t mistaken, this is the overwhelming sweet scent of an omega,” his expression was one of manic glee. The towering alpha kneels down, this close Yuuji can see how sharp his smile was and the thin outline of blue around his blown pupils.
It’s fortunate that it was Gojo who found him, it would be difficult to explain himself and humiliating if it had been anyone else. Though he gets second thoughts when a cold hand cups the back of his neck, an overwhelming feeling makes his changing body tremble.
Gojo smiles at the sight.
In a blink, the prime alpha scoops him up and teleports them. Yuuji is slow to realize that they’re back in his dorm, he squirms out of his hold and the alpha sets him on the rumpled bed full of blankets and clothing for a makeshift nest.
Standing by the bed, Gojo’s large hand returns to the sensitive spot on his nape. Despite his desire to get away, Yuuji remains perfectly still as his shaking hands clench the comforter.
"You really turned into an omega.."
"Yes…” Yuuji swallows the lump in his throat and attempts to get off the bed, “Thank you for your help, senpai. But I need to leave now."
Ignoring his feeble attempt, Gojo easily shoves him face first into the bed by his neck before climbing into bed. It’s when he’s adjusting his hold that Yuuji is able to turn and deliver a swift kick to the alpha’s side that he scrambles free. Such a tiny dorm yet the omega feels as though the door was miles away, he collapses with a choked cry.
His anguish is short lived when a cloying, sweet aroma suddenly makes his entire body throb as any remaining fight is sapped from his body. Instead, an animalistic desire to present replaces any rationality.
"My pheromones. Do you finally understand?" Gojo’s voice was muffled by the drumming of his heart. "Yuuji is mine."
The ache in his lower stomach shifted into something tingly and pulsating, his hole clenched as a wave of slick arousal dampened his ass. Now as a presenting omega, his body was eager to submit to an alpha, especially the one it knew so intimately. His body wanted just as much as it needed to get mounted and stuffed full with virile come before a knot, to get pregnant with a child.
"I'm glad Yuuji wants me. You finally caught up to my feelings," Gojo hugged him closely, kneeling down beside him."I want to get you pregnant too, I was dying to do it since the first time we had sex."
"No.. s.. senpai.." Yuuji pleaded weakly.
Despite his small resistance, Gojo pushed him onto his stomach again and licked the boy's nape with his long tongue.
"You and I were bound by fate, Yuuji," he said in a sweet voice. "Let's be together forever."
Yuuji's heart was full of anxiety when he felt the boy's breath on the back of his neck and knew he couldn't escape it anymore.
The face of his first love, Geto-senpai, crossed his mind. But after Gojo sank his fangs into his skin, Yuuji could only think about him.