Chapter Text
Was it a lapse in judgement?
No, this was too drawn out to be a simple 'Oh! I must've zoned out and reversed your cells back to immaturity- where you were vulnerable to your very being as an alpha.. Whoops!'
Gojo Satoru hadn't staked out for months, waiting for the perfect moment to turn his dear student into an omega.
No, it was spur of the moment.
Gojo walked into the little hideaway he's had Yuuji holed up in for the past few weeks, training his wildfire of cursed energy into a firm and even blade- using a cursed corpse to punch the boy square in the jaw when that steady stream of energy shifted. It was very efficient, going from punching Yuuji every few minutes, now it was every so often, when the boy would get tired or dozed off during a movie.
The teacher was a bit tipsy, the slight smell of alcohol being masked by the pheromones swirling in the room.
Yuuji's vile and all too potent ..alpha pheromones.
As an alpha- and in a drunken state, Gojo couldn't help but react to the almost offensive stench, stalking over before he pulled his blindfold up, just enough his eye was seen before he placed his palm against the teenagers throat, a shocked whimper emitting from the young alpha as a sharp pain shot through his body.
"Gojo Sensei!" Yuuji whimpered, rubbing over his neck as the cursed corpse swung wildly, slamming his fist into the young alpha's jaw before Gojo stilled it with his own energy.
Gojo paused, glancing down at his hand before pulling the blindfold back over his eyes. Shit.
"Ah! Yuuji- sorry, I should've warned you but there was a nasty bug on your neck and I didn't want it to bother you in the middle of training.. Forgive Sensei?" Gojo cooed, pressing his hands together in a praying motion, putting on his funny and almost oblivious persona so Yuuji didn't put his guard up and realize what Gojo had just done..
Reverse his cells.
Yuuji seemed to buy the act, laughing softly as he rubbed over his still stinging throat, trying to soothe the ache. "Really? I didn't even feel it.." the alpha murmured, shutting his eyes before sighing as that strong ache started to dull but not quite go away. "I was so focused that I didn't even feel a bug! Isn't that cool, Sensei?!" Yuuji chirped, his chest swelling in pride as if there was even a bug in the first place.
"You should be aware of your surroundings at all times, Yuuji! Well, it's alright since it wasn't anything serious.. I'll be back with some food- what would you like?"
"Onigiri!"
"Coming right up!"
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Gojo came back about fifteen minutes later, about ten home made onigiri on a plate that he presented to Yuuji who greedily gobbled down as if he was a starved man.
"Sensei.. It's too salty." Yuuji complained yet still shoved another in his mouth, drinking a mouthful of water along with it.
"What? Sensei made that himself! You're so cruel, Yuuji~.. Hurting Sensei's feelings..." Gojo mocked being hurt, shaking his head as Yuuji quickly sputtered out an apology as he quickly finished off the plate.
Gojo knew it would be salty- he came into the bowl of rice three times to make sure it was potent enough before he made the shape and gave it to Yuuji.
To properly turn an alpha into an omega, their already matured alpha cells had to be regressed to a vulnerable state, enough for a bad alpha like Gojo Satoru to dope him with as much bodily fluid as he possibly could til Yuuji inevitably turned into the omega he should've been from the start.. Those plush thighs and that slim waist were not made for an alpha. Gojo was here to fix that mistake.
From that day on Gojo came and spit on every food that he offered to Yuuji, of course the naive alpha happily ate it- when Gojo decided he wanted to put a heavy load of semen into the food Yuuji would complain about it having a weird taste or a strange texture.. Of course Gojo, the cunning bastard he was, would smoothly give a witty explanation and Yuuji would give a sigh, ask for water then finish off the meal.
After weeks of this same routine, Yuuji started to act differently, his usual spunky and cheery personality stayed the same but his body language changed, instead of easily meeting Gojo's eyes- if you could even do that behind his mask, now Yuuji would only glance at the man in passing before averting eye contact and scurrying away. It was cute, when he was embarrassed his scent would spike and instead of that usual woodland and almost spicy odor the boy now smelled like the wood but it was muted, overpowered by the sweet- almost floral scent flooding off of the omega.
With a long and excited smile, Gojo entered the room once again, expecting to give Yuuji his daily dose of saliva and semen when a fierce scent hit his nose.
A heat.. An omegas heat.
The Alpha took in a sharp breath as he glanced around the room, trying to figure out where the little omega was hiding, tossing the box of food onto the counter just as a loud cry was heard, pink hair peeking from the cushion of the couch before dipping back down, rustling muffling the gasps and groans the omega was producing.
"Yuuji.." The alpha cooed, swallowing a mouthful of saliva before he stalked toward the couch- much like he did when this whole situation unfolded, peeking over the torn and bitten cushions to see Itadori grinding his cunt down on one of the many pillows Gojo had scent marked around the room.
The omega was digging his teeth into the cushions, completely nude, bucking his hips against the pillows and against anything firm enough to give him some sense of relief. "Ughnn! Sensei- it hurts!" Yuuji cried, cock hanging heavy between his legs even as a puddle of cum and slick coated the pillows below him. "Is... is it a rut? It's not-...not the same! It's painful! Hurts-" the omega shouted, eyes teary and wet as he pushed himself to sit up, staring at the alpha before him. "Sensei it feels weird!"
Gojo had to chew on his cheek as hard as he could to keep himself from smiling, raising a brow in mock concern as he reached his hands out to the omega's tear streaked cheeks which Yuuji early leaned into. "Oh Yuuji.. You poor thing.." the alpha cooed, moving around the couch, chuckling softly as the omega humped the pillow, groaning as the weak stimulation did nothing to ease the tension in his body.
Gojo knew what the recently awakened Omega needed; a fat knot and cum flooding that virgin womb.
Of course Gojo would give it to him in time, for now he wanted to watch the omega squirm, writhe in the fact he was unknowingly waving his previous life as an alpha goodbye with every passing minute. "Are you sick? You said you were in a rut, yes? What should I get you, Yuuji?" The alpha asked, pressing his hand against the back of the couch, leaning over as he pushed out some heavy pheromones, a smile on his face as Yuuji started to squirm, more slick coating the pillow the teenager was rutting against.
"..Sensei- Gojo Sensei.. I need.. Sensei!.." Yuuji whimpered, eyebrows screwing up as he leaned his head back, exposing his neck to the alpha while the omega pressed his nose against Gojo's wrist, sniffing where his scent gland should be.. just to find it hidden by a scent blocker.. How was Gojo's scent so pungent if it was covered?..
As if the alpha could read Yuuji's very thought, he spoke up; "I'm an alpha cut above the rest, Yuuji. Of course my scent would be much stronger than an average alpha." He hummed, watching as Yuuji growled, teeth biting and pulling at the blocker, aching to get a direct smell of the gland. "Are you sure that's a smart idea, Yuuji? The scent of another alpha during your rut could cause a violent reaction.." Gojo asked, raising a brow as the omega whimpered, using his fingers to pull at the blocker, hesitant to peel it off in fear of Gojo's words coming true. Yuuji didn't want to hurt his alpha.
..
His alpha..?
Yuuji was stunned by his own thoughts, staring dumbly at his teacher. Why would Gojo be his alpha? Yuuji was an alpha- but this didn't feel like a rut.. When Megumi would coldly explain his heats to a nagging Nobara, he'd say how it was both frustrating and heavenly, that you would be on the edge for hours- even days til your alpha decided he'd let you cum.. but then once you did it would feel like everything was right in the world- yes Megumi had a heat partner that he refused to disclose but Yuuji never poked him about it, Megumi was a secretive guy.
Gojo watched his student, how the omegas eyes narrowed and glanced around, as if processing something was wrong.. So Gojo smoothly tore off the blocks on his wrist, a flood of pheromones hitting Yuuji directly. As the omega jerked to attention, slick gushing out of his cunt as he jerkily turned on his knees, pushing the all too willing alpha onto the couch, crawling on his waist as he pressed the alphas wrist to his nose once again, moaning as he grinded his hips against his teachers probably expensive pant leg.
Having such a huge amount of pheromones hitting you at once was like getting high too quick, you felt fuzzy and lightheaded.. but it felt good to not be all there.
Yuuji was pliant, mouth open and sucking fiercely at the gland, his hips jerking and humping against Gojo's thigh like some wild animal.
But that's how Yuuji felt- wild and unstable, like he needed Gojo to satisfy him but the new found omega wasn't sure how to do it.
As Gojo watched his dear student start to ride his thigh, the alpha casually took off the remaining patches on his neck- they were mandatory for alpha and omega teachers just in case their still immature students got overwhelmed and tried to pounce on them.
Soon the alphas lustful scent was flooding the room, heat pheromones clashing and fighting together til they eventually swirled into one. "Yuuji.. Are you even an alpha at all?'' Gojo asked, watching as Yuuji's face scrunched up, lip curling as he growled, the sound deep and threatening as he bit the Gojo's wrist, blood pooling into his mouth.. Obviously Yuuji still has the instincts to react as an alpha to insults. Not a problem, Gojo could work with that.
"Don't take offense, Yuuji- I'm simply asking a question!" Gojo laughed even though his cock was aching to fuck this omega.. He couldn't just yet- he wasn't sure if Yuuji would start attacking him.. So he had to convince the omega he wanted it. Simple enough, Yuuji wasn't that smart so Gojo was confident he could trick this little omega to let him pop a knot in that cute mouth of his! "Alpha's react negatively to another alphas pheromones during a rut, right? You're reacting positively- so much so your cute little pussy is leaking through my pants." Gojo stated, holding back a laugh as Yuuji growled and grinded his teeth deeper in his arm yet kept up his humping.
"Yuuji.." Gojo whispered, taking the boy by the back of his neck, scruffing him and shaking his head to get the omega to let go before he pressed Yuuji's nose right against his neck- where his most potent gland was.
Yuuji went crazy, his hips speeding up as he used his hands to rip at the teachers shirt, moaning and whimpering right into the alphas ear as he approached his climax, those sweet sounds getting higher before--
..Gojo roughly grabbed Yuuji's hips, pulling his drooling cunt away from his slicked up leg. "Bad boy, Yuuji. Omegas need to ask before cumming." He stated, laying his beautiful omega down on his back, spreading his legs, rubbing between that peachy fuzz Yuuji called pubic hair til he found it- that beautiful pussy that was formed over Gojo's tireless hours of making his dear student a true omega. Gojo growled, using his two thumbs to pull his lips apart before licking a hot stripe over his clit, sucking at it.
"Gojo Sensei! Oh god-" Yuuji wailed, pushing his hips higher, back arching as his stomach coiled into knots. "Gojo Sensei- what-.. ngh! Oh god- what is that!?" Yuuji squealed, back arching as Gojo inserted a finger, curling it to press against the little omegas g-spot. "I'm gonna-.. mm! gonna-"
With a teasing smile, Gojo took off his blindfold, that blue eyes piercing straight through Yuuji's entire being. "Yuuji~.. Don't you dare cum." he warned, putting a command into his words. Yuuji groaned at that, his body willed to listen even as he ached to cum for his alpha.. Yet he couldn't, as Gojo licked and sucked at his pussy, all Yuuji could do was cry and squirm, grab at Gojo's hair and ride his face.
No matter how close Yuuji got to the edge, his body refused to cum, simply shaking and twitching before an unsatisfied wail was ripped from his throat. "Sensei please! I want to cum- please, alpha.. Please!" Yuuji sobbed, scratching at alphas back til there were streaks of red running down it.
Gojo simply ignored Yuuji's complaints, the only reaction he gave was the occasional glance to see Yuuji's fucked out expression but aside from that, he eagerly ate the boy out. Gojo sucked on the boys clit, completely ignoring Yuuji's throbbing cock and focused on his sopping cunt.
This went on for about an hour til Yuuji started to genuinely cry, wailing like he was a neglected babe as he shook his head from side to side, bucking his hips to try and get Gojo off of his overly sensitive cunt. "G-Gojo Sensei!" Yuuji shouted, watching with reddened and wet eyes as the alpha finally moved away, licking off his slick coated lips, running his hand over Yuuji's throbbing pussy before raising his hand and slapping it.
With a yelp the omega cursed, reaching out to attack the alpha. All Gojo did was raise his eyes sending a glare his way, and successfully stopping the omega in his tracks. "I'm not Gojo Sensei to you, Yuuji." The alpha stated, chuckling as Yuuji gave a bewildered expression, confused on what Gojo meant as the man hit his pussy once again. That got the point across. "S-Satoru! You're Satoru!" Yuuji cried, yelping as he was hit once again, still wet and wanting even with the abuse Gojo was raining down.
"Wrong, Yuuji.. You're making your alpha sad.." Gojo whispered, pinching the omegas clit with a casual smirk on his face. That was all the hint Yuuji would get.
It seemed to be enough though, the omega blinked wildly, gasping softly as Gojo gave him a sideways look before raising his hand, ready to land another hit. "Wait- wait! Please!" Yuuji shouted, gripping the couch with a sharp inhale.. But Gojo didn't stop, landing a firm hit against Yuuji's cunt once again.
The omega squealed, slick gushing from his hole as hot tears fell from his eyes. "Alpha! Alpha please- wait!" Yuuji wailed, shutting his eyes in preparation for another hit.. that never came. After a few moments, Yuuji opened his eyes to see Gojo staring down, eyes narrowed as he glanced from his slick covered hand to the cowering omega beneath him.
"Yes, Yuuji?" Gojo cooed, using his thumb to rub over the others clit, humming softly as Yuuji squirmed, thighs quivering as he sat up, sniffing softly as he pressed his nose back against Gojo's scent gland, aching for that sense of comfort it offered. "..I want.. I want to cum, please.. alpha? I want you." Yuuji whispered, doing his best to try and seduce Gojo into just abandoning this sudden obsession with torturing Yuuji!
"Well Yuuji... I would love to but.."
"..But what, Sens-.. alpha?"
"That cock of yours isn't suited for an omega, is it?" Gojo asked, flicking the others swollen and aching cock- by now the head of it was purple and leaking, balls tense and tight. "I want to fuck an omega- not an alpha." Gojo stated, acting as if his own dick wasn't straining against his zipper.
Gojo could easily fuck Yuuji even with that heavy cock leaking.. but if Yuuji was supposed to be an omega fit for a Gojo, Yuuji's cock was supposed to be castrated or at the least, a cocklet, drooling precum and never swelling at the base like an alphas would.. Gojo was just getting rid of this problem before hand.
With a dejected expression the omega looked down at his cock, thoughts running through his already heat drunk mind.. before he settled on one. With a truly devastated expression Yuuji finally looked at Gojo, frowning. "I can't.. stop being hard but if you.. command me to, it'll go down."
"Well... since you asked so nicely." Gojo flashed a toothy grin before he rubbed his nail from the head of Yuuji's cock to where it was swelling before he gave a bitter sweet command; ''Let that ugly cock of yours soften up."
With a cry the omega attempted to roll on his side- stopped by Gojo of course who watched Yuuji squirm and cry as his cock softened til it was half chubbed. Once it got small enough, Gojo tied a band around the omegas balls then shaft so Yuuji couldn't cum with his cock even if he tried.
"Perfect, my perfect little omega.." Gojo purred, licking along the others cheek before he quickly pulled off his pants, letting his cock smack against Yuuji's wet cunt.
The two moaned at the feeling.
Gojo shut his eyes as he gently rolled his hips, slicking up his cock with the omegas juices.
"Alpha! In- put it in! Please!" Yuuji whined, eyebrows screwing up as he lifted his hips.
"Naughty~ You're so cute.. Ah, but what if you get pregnant, Yuuji? I wouldn't be able to live with knowing I got you knocked up.." Gojo trailed off, shaking his head as he sighed.
Gojo knew what he was doing, no omega in heat could resist the idea of an Alpha fucking a baby into them.. and neither could Yuuji.
The teen whimpered, rutting his hips against Gojo's cock- whining softly as the head of his cock grinded against his clit. Yuuji's mind swirled, imagining himself cuddled up at Gojo's side, stomach swelled as the two chatted about their favorite sweets.. Yuuji somehow got even wetter, pussy slick as he cried out, tears streaming down his face as the teen furiously nodded his head. "Gojo Sensei! I want it! Please, alpha, please!" He begged, spreading his legs impossibly wider reaching his hands up and pulled Gojo down, pressing their lips together in a kiss that was more teeth and growling than lips.
"You want a baby? Hm? Wanna get knocked up?" Gojo asked, trailing his hand down to Yuuji's stomach, pushing the heel of his palm against the others stomach- against his womb. "Cum deep right here? You wanna make me an heir?"
Yuuji moaned, arching his back against the couch, nodding. "Yes- anything, alpha.. anything!" Yuuji mewled, clenching on nothing as Gojo spread open his folds before finally sinking his cock in.
Yuuji immediately bit down on the alphas shoulder, growling as he pushed hips til Gojo was all the way in, squeezing down on his cock. "Good.. Good." Yuuji moaned, wrapping his legs around the mans hips, trying to push him even further before Gojo chuckled, licking over his neck before rocking his hips. "Oh baby.. I can't move if you're holdin' on so tight." Gojo cooed, rolling his hips.
"No I..I wanna stay together.." Yuuji whispered, yelping as Gojo picked him up, now they were sat down on the couch properly while Yuuji was straddling Gojo's hips, that cock going even deeper in this position.
With a loud whine Yuuji rolled his hips, biting softly at the alphas shoulder as he melted into the mans touch. Even in his murky heat induced brain.. Yuuji knew that this situation was strange- as an alpha he shouldn't be clinging to Gojo with the mans dick buried inside of his pussy- Yuuji shouldn't even have a pussy! It was strange.. but Yuuji didn't want to question it, Gojo was finally here.. was finally focused only on Yuuji.. So the omega licked over the bite mark, sparring Gojo a glance before he lifted his hips, locking eyes with the man before dropping them, moaning as the head of the alphas cock knocked against his cervix.
"Are you getting excited? You're so cute, Yuuji~" Gojo cooed, taking the omegas firm hips before pressing a chaste kiss against his lips. "Let your alpha take care of you. Just relax." With a coy smile Gojo slammed himself in deep, licking over Yuujis ever enticing throat, his teeth nipping at the skin as he fucked his cute little omega, groping his ass as Yuuji squealed and squirmed, eyebrows screwing up as he moaned, pussy clenching as if it wanted to milk out all the cum Gojo could offer..
And when has Gojo ever denied his student what he needed?
With a growl Gojo pushed himself as deep as he could, his knot catching on the omegas cunt, the base starting to swell but Gojo kept thrusting, moaning as Yuuji eagerly rolled his hips down to meet Gojo's. "Close- Sensei, I'm close! What.. How do I-" Yuuji shouted, twitching as he reached his hand down to his still tied cock. "Sensei! How do I cum-" The omega sobbed, that familiar twisting and coiling in his gut but he had no way to reals it, stuck squirming and crying as Gojo purred into his ear licking the lobe.
"You have to cum like an omega Yuuji- with your cute little pussy." Gojo cooed, moaning as he slammed himself as deep as he could, knot swelling as Yuuji cried, juices squirting from his cunt as he came, vision whiting out as he screamed out a moan, nails latched into the alphas skin as she shook and twitched.
Yuuji soon blinked himself back into consciousness, low laid down on the bed that Gojo managed to fit into the cramped room, firmly pressed against the alphas chest, still knotted and filled with cum. There was no way it wouldn't take- Gojo was pressed right against the mouth of his cervix! If it didn't then Yuuji would be infertile- and for some reason he seriously doubted that.
"Yuuji~ how was your first heat?"
"Gojo Sensei... You're.. not gonna leave me, right? Megumi told me.. that you're a good for nothing playboy-"
"Megumi said that? That hurts Sensei's feelings~" Gojo whined, nuzzling his cheek against Yuuji's head, earning a laugh.
"I don't think that about you Sensei, I just.. want to stay like this forever. Together until you execute me." Yuuji muttered, running his hand through Gojo's snowy hair, sighing softly.
Gojo quickly shook his head, laughing. "You won't die as long as I'm here, Yuuji. When you have your next heat flash I'll claim you properly.. and knot in your mouth."
'Sensei."
"..Next time then.. For now rest up, Yuuji. Sleep well."