Chapter Text
Most people take pride in their secondary genders. They wave it around and throw it in people's faces even when it didn’t need to be. In school from the age of 6 (when they start learning about secondary genders), the children all talk about what they wish to present as when they turn 14 or 15.
His grandfather always said that Yuuji would probably be a Beta like himself and his father, but the teachers and other students in his school assumed he would end up presenting as an Alpha due to his physical build and stature. Yuuji didn’t pay it much mind, the teachers had fully explained to them that while genetics played a large part of primary and secondary genders they did not account for all of it, and that the way someone looks isn’t accurate way to predict secondary genders.
Yuuji found, even as a child, that he didn’t particularly care what he presented as. He always had much bigger (and more important things) on his mind rather than something that in this day and age shouldn't affect the population as much as it did. It just didn’t matter to him, especially after his grandfather got sick
Yuuji didn’t have the mental capability nor the time and energy to deal with a presentation. Not when his grandfather was in the hospital and he had to juggle taking care of the house and himself while going to club activities for his grandfather, plus all the odd jobs he could get to make extra money.
So when Yuuji did present a few months before he turned 15 as an omega, his heat was not even finished before he started taking suppressants.
The day his grandfather died was heartbreaking for him in more ways than one.
He had lost the only person he had in his life, the only one he considered his and who he knew he always had no matter what. He felt shattered. Grief gutting and numbing his insides. Loss weighed heavily on his shoulders as he signed the paperwork, feeling numb. Wasuke’s gruff voice filled his mind as he imagined his grandfather rolling his eyes and laughing at him. “You’re a strong kid, act like one,” the voice told him, heart clenching as he tried to shake off the guilt and grief. Much easier said than done.
Wasuke would laugh at him, he wished he was still here, laughing and yelling at him.
Yuuji had lost the only thing keeping him sane. The only one who really cared about his feelings and life. The man who raised him, the man who even with the word grand in front of father was still basically his dad.
He didn’t need to participate in club activities without his grandfather forcing him to go. Sure the school had their rules, but did that really matter? Nor was he required to work so he could pay his grandfather’s hospital bills without dipping into the money he was left with. He had no reason to do anything now.
Until he swallowed Sukuna’s finger.
It felt disgusting and chalky going down his throat, tugging and scratching at his esophagus before it settled in his stomach like a weight.
He could feel Sukuna’s power burning through his veins almost immediately. Body going loose as it started shutting down from his mind, Yuuji was losing control of his limbs.
He could feel a heat spreading through his veins as Sukuna started eliminating anything that could be classified as a ‘poison’. Which included the heat suppressants he was on.
Yuuji barely registered what was happening around him as the warmth raced through his body, barely understood that his heat was starting after the emotionally and physically exhausting day.
His heat was starting. He felt his control over his body slip away and he fought to regain it. His shirt was off now, cooling down his chest. This was what he needed. To take off his clothes. His head felt fuzzy. Like it was stuffed with cotton. He felt like he was underwater when he heard the sound of an alpha speaking to him.
“Under Jujutsu regulations, Itadori Yuuji… I will exorcise you as a curse.”
And it was at that moment when the heat finally took over, working fast through his body due to all the stress he experienced today, and Yuuji felt himself collapse to his knees.
While he didn’t want to say it explicitly, Megumi was not like other Alphas. It was too ‘not like other girls’ for his liking which was why he didn’t say things like that though he knew for a fact he was better than other Alphas.
Megumi wasn’t completely sure what to do at first. That was until the smell of an Omega filled his nose. Peaches, cherry blossom, and honey. The pink-haired boy ( Omega, his brain whispered, Omega to mate. Mate. ) smelled like a warm summer day, like freshly baked goods right out of the oven. Like ripe fruit ready for picking.
Megumi was an early bloomer, having his first rut at the age of 13, just before his 14th birthday.
It was not very surprising to anyone who knew him that he was an alpha. Temperament and genes pointing towards it early on. Gojo had gotten much enjoyment from hearing about Megumi’s fights at school.
Tsumiki had just signed and shook her head. Not being able to stop him but not wanting to encourage it either. Being an Alpha to Megumi wasn’t something that mattered to him but he was still proud of himself.
How could he not be when he knew his power.
Before he could stop himself, Megumi felt his body moving toward the freshly presented Omega. His scent was only getting stronger and Megumi found himself releasing his own scent to try and mask the pink-haired boy’s.
( protect, protect omega. Protect mate.)
Yuuji’s skin was warm to the touch. Megumi wanted to wrap him in his arms as a personal heater (and fuck toy) and never let go. He smelt and felt so fucking good.
The Omega let out a high-pitched whine of frustration, making an effort to tug on his shirt to try and get it off. Megumi chuckled slightly at his actions.
“Silly Omega. Would you like some help with that?” Megumi hadn’t noticed his voice turn husky but Yuuji let out a groan. Yuuji chirped and Megumi was quick to help him shimmy out of his pants and remove the tattered remains of the shirt Sukuna ripped. His own clothes followed shortly. Yuuji had pressed himself into Megumi as much as he could, trying to hide into the taller boy. Megumi found it cute and endearing. His Omega was so adorable.
“Good boy, such a good Omega.” Another chirp met his ears and Megumi smiled, something that he rarely had a reason to do anymore.
“Do you like that?” he whispered under his breath and Yuuji moaned softly. Distantly, Megumi wondered if the boy in his arms still had the mental capacity to talk, but that was a distant, fleeting thought as an Omega in heat sat in his lap. He could feel the inklings of a rut starting at the back of his mind.
Yuuji shifted on his lap again. His back now pressed to Megumi’s chest. The Omega’s breathing was laboured and loud as he tried to take in oxygen. Megumi used this change in his position to his advantage as he moved his arms from around the pinkette’s waist to his chest.
Megumi traced along Yuuji’s breasts, massaging and rubbing the soft mounds of flesh. His finger's light touch had Yuuji letting out soft whines as he went along, urging him to get on with it. Megumi may have been on the edge of his own rut, but he would take his time to properly enjoy his meal before devouring it.
“Good boy Yuuji, you’re so good for me. What a pretty Omega I found. So good for me, such pretty sounds,” He drew circles around the Omega’s sensitive nipples while pressing his face right into the scent gland on Yuuji’s neck, drinking in the scent straight from its source. Yuuji whimpered as Megumi began to suck.
One of his hands traced down from Yuuji’s nipples to his pussy weeping with slick. He traced around the entrance just for Yuuji to moan and adjust his hips so the tip of Megumi’s middle finger found its way inside of him. Megumi tisked lightly but still allowed the Omega to force his fingers inside of him.
It was at that point that Megumi decided that maybe mating his Omega on top of said Omega’s school was most likely not the best idea that he had ever had. He was so lucky that Gojo hadn’t shown up yet to interrupt–
Speak of the devil and he shall appear.
Megumi never cared much for the white-haired man but as he looked down at the Alpha and Omega pair he had never resented him more. He was glad he wore that stupid-looking blindfold so at least Megumi did not have to see the look in the other man’s eyes.
“Megumi-Chan?” Gojo’s voice sounded questioning but it just made Megumi more annoyed. He was sure underneath that blindfold he was blinking dumbly, at least he hoped he was.
Megumi growled at the other Alpha, his fangs sharpening and elongating at the threat in front of him. Snarling, he let out a sharp “mine.”, changing Yuuji’s position to shield him from the white-haired bastard's view.
Gojo blinked dumbly before his lips curved ever so slightly in amusement as Yuuji started to let out small sobs from the other Alpha’s presence. Megumi quickly wrapped his arms further around the shorter boy to try and comfort him, to make sure Yuuji knew that his Alpha was there to protect and take care of him.
“Yes, yours. No one else’s. Can I take you both back to campus?” Gojo barely waited for a response before Megumi found himself on his bed, Omega on top of him and Gojo nowhere to be seen. It was better that way. Gojo should never be seen.
Yuuji stopped whimpering but tears still ran down his cheeks as he was becoming more and more desperate. He was sick of all the toying that Megumi was doing. He whined again as Megumi slid his fingers back inside him, fully this time.
“What do you want, baby? Use your words.” Yuuji’s walls clenched around Megumi’s fingers and it went straight to his dick. It was already standing at attention but Megumi had been ignoring it in order to play with Yuuji. Megumi started to move his fingers, pumping and scissoring to stretch Yuuji’s hole for his dick. The warm walls were tight and Megumi’s fingers moved with ease.
“K- Knot, want Alpha’s knot.” Yuuji let out between moans and Megumi felt another smile starting at the side of his mouth.
“You want my knot? You’ll take it like a good Omega. Should I pump you full of my pups like a good Omega? Watch you get all big and round with my pups?”
“Mmm yes,” Yuuji’s words were cut off with a whine as Megumi removed his fingers. He shifted them again so that Yuuji was laying on his back and Megumi was over him. He reached down to line his dick up with Yuuji’s entrance.
“Are you sure you want this Yuuji? You can still back out now.”
“Yes, Alpha. Hurry Alpha. Now, now now noW-” his sentence was disturbed with a loud moan as Megumi thrust himself fully inside in one go, bottoming out inside the shorter boy. Megumi could have stayed like that forever, lost in the warm heat and sweet scent of his Omega. His room would probably never smell the same after this but he didn’t care. It was his Omega’s scent, this was the only thing he ever wanted to smell for the rest of his life.
“Good boy, such a good boy for me.” Yuuji started crying again, likely from the stretch of the intrusion his body was experiencing. Megumi waited for him to adjust, petting his hair and kissing his face and down his chest. His skin was salty with a shine of sweat but it mixed well with the potent taste of peaches that lingered on the pinkette’s skin.
Yuuji was quick to start whining again after. Megumi took this as his cue to start thrusting, slow at first to enjoy the feeling as his cock was gripped by Yuuji’s walls as he moved. Yuuji was tight and warm and wet and Megumi felt like he had reached heaven. He might have for all he knew, and he was escorted there by a pink-haired angel. His lips sucked on Yuuji’s neck, leaving hickeys and gentle bites as he went.
( claim, his mind urged, claim)
“Moremoremoremoremore!” Yuuji was slipping deeper into the throws of his heat and Megumi took it as a cue to speed up, hitting the spot inside Yuuji that had the Omega cry out.
Megumi kept going until the boy beneath him was a whimpering mess. Tears were rolling down his pink flushed cheeks and it made for (in Megumi's opinion) the cutest sight in the world.
With a groan, Megumi slammed back into the beautiful boy under him, bottoming out. His cum shooting inside of the Omega, knot swelling inside of Yuuji. His self control (which he was not actually planning on using but he liked to know it was there) snapped and in the blink of an eye his teeth were in Yuuji’s neck. Fangs pierced the skin and Yuuji screamed as he came, a claimed knotted Omega.
Megumi continued shallow thrusts into his mate, Yuuji whimpering at the stimulation. His tongue traced the mark he left, licking up the blood.
Megumi flipped them again so he was laying on his back, Yuuji half on his chest. The smaller boy made himself comfortable, snuggling in to the warm boy below him. Megumi thought his mate made the most beautiful sight in the world.
As the two of them lay there, basking in the afterglow of sex and mating, Megumi was at peace.
From now on they would be together, and they had all the time in the world to get to know each other.