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Eijirou isn’t, by nature, a jealous person.
Even with previous boyfriends he never felt that possessiveness, never heard his Omega shout in rage when another Omega flirted with his boyfriend like Kaminari talks about. In fact, he hadn’t heard his Omega at all until his first year at U.A.
Or, more specifically, his first day at U.A. He had been so excited to meet his classmates, to begin his future as one of the few Omega pro-heroes. Eijirou had walked into class smiling, and then, he had seen Katsuki.
It was the first time in his life his Omega had been genuinely attracted to anyone. And it had been the first time his Omega spoke, in a voice not quite his.
Him .
He still hadn’t heard it since then. Not when he and Katsuki started dating in his second year, or when he spent his heat with Katsuki the summer before their third. In fact, it chose to speak up to him again at an odd time.
Eijirou was just lying in bed, hair already down for the day, when he suddenly felt a pull in his chest, as if he were missing something.
Go .
Eijirou’s eyes widened, and he stood, following the pull out of his room, down the stairs, until he was near the common room, where he heard a laugh he didn’t recognize. He felt the pull in his chest tug , and he stumbled forward, until he was standing at the entrance and was hit with a smell that he also didn’t recognize.
He cringed at the new smell, mingling in a bad way with the usually familiar and comforting smells of the common room. He realized it was an Omega, and maybe one of the Alphas brought home a date.
Except, if that were the case, why didn’t he know in advance? His classmates knew new smells in the dorms made him uncomfortable, that was learned in their second year when Shinsou moved in. Plus, why would his Omega lead him here, if that were the case?
So he kept walking forward, toward the couch, until he was close enough to see the heads of the two sitting on it. They were close to each other. One head of soft, platinum blonde hair and the other darker, spiky-
Katsuki?
Alpha .
He heard the girl, and this close he finally recognized her as Camie, laugh again. Then, she sighed out, “You’re such a dick, Katsuki.” His alpha huffed, and Eijirou saw his head lean away, probably to lay on his hand.
“Shut the hell up, Camie.”
He was close enough to reach out his hand to touch his alpha. He could smell him through the thick fog of Camie’s scent.
Why hadn’t his alpha noticed him, yet?
That thought, that deep, wrenching feeling in his chest, was the first time he had felt jealousy since he could remember. And he was mad . Katsuki was just letting Camie rub her dumb, gross scent all over him, all over the common room. Next thing Eijirou knew, she could be doing the same thing in Katsuki’s room.
Have to be there first.
His Omega was right. If he got there before Camie, then he could rub his scent all over Katsuki’s room, in his sheets, onto his desk, in his carpet, if he had to. Quickly, Eijirou turned around, racing back up to his and Katsuki’s floor.
He’d show Camie. Katsuki was his alpha, not hers.
-
Eijirou has the perfect plan. He enacts it the second he arrives in Katsuki’s room, running to his Alpha’s dresser and tugging out Katsuki’s favorite shirts, his work-out clothes, even the extra top from his hero outfit. They all smelled like him. Indulgently, he pressed the bundle to his nose, breathing in his Alpha’s scent with a quiet moan.
Then he threw them onto the bed, along with his own shirt and sweatpants. He wasn’t wearing anything underneath. Eijirou quickly got to work, spreading the clothes and his alpha’s blankets until it looked, and smelled, perfect .
Smiling, Eijirou laid down in his nest, pressing his nose into the thick scent of his Alpha. Katsuki loved when he set up his nest in his room. He looked up, and smirked.
The next step in his plan. Sitting up, Eijirou grabbed Katsuki's pillow, setting it in the middle of his nest. Originally, he was just going to sleep in Katsuki’s room to ensure Camie wouldn’t be able to do anything in his Alpha’s room. But he had a better idea.
It would probably make Katsuki angry. Definitely.
Good , his Omega purred, and Eijirou smirked. If Katsuki wanted to let other Omegas dangle all over him, he would have to deal with Eijirou getting jealous.
Eijirou grabbed the edge of the pillow, licking his lips. “Are you sure?” He whispered out loud.
Do you want her to?
“No,” Eijirou responded steadily. Then, he sat down, bare ass and all, onto Katsuki’s pillow. “Oh god,” he whispered, “Katsuki’s gonna kill me….”
He wasn’t even horny . His dick was soft, and he wasn’t even close to leaking slick. This was pointless, Katsuki was gonna come in and see him rubbing his ass on his pillow and kill him.
Eijirou could still smell her. Even two floors above the common room, surrounded by his alpha’s scent, he could smell her .
“Fuck it,” He growled, grabbing the nearest article of Katsuki’s clothing (his favorite t-shirt), and pressing it to his nose. He relaxed, his Alpha’s scent calming his fears, and he slowly rocked hips against the pillow.
It didn’t feel that good, yet. The pillow was dry, and his dick was soft, and unless he added lube he would probably chafe his dick. But with his alpha’s scent pressed right to his nose, he could already feel the tension building in his lower back.
It was easy to imagine Katsuki there with him with his scent crowding his senses. He could imagine Katsuki’s hands pressing his hips down, he could practically hear Katsuki growling in his ear, “ So desperate for your alpha you had to come and hump my pillow? You’re such a slut for me, Eijirou .”
“ Yes ,” Eijirou hissed, dragging the shirt down his face, underneath his ear until it was pressing against his scent gland. He shuddered, feeling Katsuki’s scent seep into his skin, marking him, letting any alpha who smelled him know that he was taken. It didn’t feel nearly as good as when Katsuki was scent marking him directly, but it was enough.
Already, he could feel slick beginning to leak out of him, his cock already full-mast. Nothing got him going better than his alpha. He whined, throwing the shirt down in front of him and following right after it, pressing his face onto the pile of clothes. He shuffled up the bed, until he could comfortably raise his hips and keep his cock pressed against the pillow at the same time without pulling his face away.
He quickly went back to working his hips against the pillow, before reaching back and pressing a finger against his hole. It was a little uncomfortable, but he knew from experience how good it could feel.
He wasn’t wet enough to just push his finger in yet, so instead he just circled his finger around his rim. He turned his head back to the piles of clothes, and took another deep breath, imagining it was Katsuki’s fingers about to push into him instead of his own.
“K-Katsuki,” He whined, breathing in the scents of his alpha. He finally pressed the finger against his hole, whining again as he slowly worked it into himself. With each knuckle, he could feel himself getting wetter, the slide into him getting easier.
If Katsuki were here, he would say, near reverent, “ I love watching you get wet for me, Ei .”
“ Katsuki ,” He whined again, now easily sliding the finger in and out of himself. Impatient, he pressed another finger beside the first, pushing them in together with a small whimper at the stretch.
“ M’ cocks bigger ,” Katsuki would say at the noise, and Eijirou scissored his fingers, just like his alpha did when he was impatient like Eijirou is now. “ Y’ gotta be able to take this to take my knot. ”
“Want your knot, Katsuki , please,” He replied to the voice in his fantasy. It was impossible to hit his own prostate at this angle, with how shallow his fingers were. Katsuki would already be pressing against it, making Eijirou want to pull off his fingers because it’s too much, please, please .
Eijirou needed more . He needed his Alpha to push inside of him. His own fingers would never be enough, never, he needed-
“ Katsuki ,” He whined, grinding his cock against the now damp pillow. “ Alpha , my alpha, alpha !”
Eijirou needed Katsuki. Now. He needed Katsuki right now , where was his alpha?
“Katsuki!” He cried out again, followed by a harsh sob as his cock pushed just right against the pillow. He buried his head back into the clothes, going back to imagining it was his alpha’s fingers inside him, that he wasn't just breathing in the leftovers of his alpha and that he was right behind him.
“ Eijirou .” His name, his alpha would say his name, then, “ Omega, my omega .”
“Y-Yours!” He gasped, slick pouring down his thigh. “Kat...Katsuki! Please!”
“ Eijirou, ” The voice of his alpha panted reverently, “ Eijirou, Eijirou-”
“Eijirou!?”
Eijirou gasped, quickly sitting up and pulling his fingers out of his hole. That wasn't fantasy Katsuki. That was definitely real Katsuki.
“K-Katsuki!?” He replied, just as surprised as his alpha. “W-What-I thought you were downstairs! With Camie!”
“Camie left an hour ago. I think a better question is, ‘What the hell are you doing’?” His alpha raised an eyebrow.
Eijirou pouted. He could still smell Camie and she was gone ? Totally not fair.
“I,” He paused, “You know I don't like new people in the dorms.”
“Camie’s not new. You've met her about a thousand fucking times, Ei.”
“Well I can still smell her! I don't like it!” He huffed. There was a sound behind him. Then, Katsuki began to laugh. “What's so funny!?”
“I can't believe you're jealous over fucking Camie,” His alpha snickered. Eijirou pouted again, turning back to the wall beside Katsuki's bed. He heard his alpha huff out one last laugh, then footsteps.
“Come on, Ei, you're the only fuckin’ omega for me, you know that.”
Eijirou huffed in reply, keeping his eyes toward the wall.
“Don't be like that,” Katsuki groaned, setting his hands on Eijirou’s hips. “You don't get to be mad at me, Eijirou. You're the one that came and humped my pillow. That I sleep on. Every night.”
Eijirou didn't reply. He could feel, in his blood, Katsuki roll his eyes. Then, one of the hands on his hips travelled down, and Eijirou assumed it was touching the pillow.
“It’s so fucking soaked , jesus,” Katsuki said, with a smirk in his voice. “What were you thinkin’ about, Eijirou?”
Eijirou shivered at the feeling of Katsuki's eyes staring him down, waiting for a reply that he wasn't going to get. Katsuki hummed.
“Bet you were thinkin’ about me findin’ you, seeing you grind your dick against my pillow. Thinkin’ about me coming over, pushing my fingers into you…” Eijirou bit his lip as Katsuki’s hand came back up, a finger trailing up his perineum to press against his hole.
“You were probably thinkin’ about how hot it would get me, to see how desperate you are for your alpha’s cock. Am I right, Ei?” Eijirou hissed as the finger pressed inside. Katsuki’s fingers weren't as wide as his, but they were longer, and reached so much deeper than his own fingers ever could.
“Yeah…” Eijirou finally replied to him, pressing back against his finger. Katsuki let him, wiggling his finger deeper inside of Eijirou.
“Good,” Katsuki mumbled, already pressing another finger in beside the first, just like Eijirou knew he would. “I love how much I turn you on, Eijirou. Tell me more.”
“I-” Eijirou started, before biting his lip as Katsuki began to spread his fingers wide as they would go. “Um, I k-kept picturing you pressing against my- god, fuck. My prostate, and I pressed your-your shirt against my scent glands bec-because I love when you s-scent mark me- Katsuki , fuck! I-I-”
“I know, baby,” Katsuki replied, following his fantasy versions footsteps and curling his long fingers. “I could smell you, could hear you beggin’ for me to mark you.”
“O-oh, god, I need your knot, please , Katsuki, god, please…” He rutted back against Katsuki's fingers, whimpering as his alpha clambered up to sit behind him, pressing his clothed body flush with Eijirou's.
“You smell so fucking good , goddamnit, Eijirou. Your slick is fucking everywhere . My beds gonna smell like you getting fucked for weeks. S’ gonna be your fault if I wake you up wantin’ to fuck you every night, leavin’ your goddamn scent fucking everywhere.”
“ Please ,” Eijirou rasped, reaching behind himself to grip at Katsuki’s clothed thigh. “I need you so bad, Katsuki, Alpha, please.”
“Anything,” Katsuki groaned back, “Whatever you want, Eijirou. Fuck , your slick is soakin’ through my fucking jeans. Fucking god-”
“Then take-” Eijirou smiled, finally turning back with lidded eyes to stare at Katsuki's red face. “Take ‘em off n’ fuck me, Katsuki.”
Katsuki growled. “You're too fuckin’ much, sometimes,” he replied, before practically falling back off the bed to pull his clothes off.
Eijirou licked his lips as his alpha sat back behind him, his cock poking Eijirou's back.
“You're acting like a virgin,” Eijirou said, laughing quietly. Katsuki flushed red, scowling.
“Shut the fuck up, Mr. I hump fucking pillows,” He replied. Eijirou laughed again.
“Mhm,” He hummed, “Stick your dick in me now, please?”
“Yeah, yeah,” Katsuki rolled his eyes, before placing his hand on the back of Eijirou’s neck and pushing him down until his face was shoved back into the pile of clothes. “Let’s not put your nest to waste, Omega.”
Eijirou shivered, raising a hand to cover Katsuki's on the back of his neck. He smiled. “Of course, Alpha.”
Katsuki smirked, using his other hand to guide his cock against Eijirou's hole. Then, slowly, he pushed in.
Eijirou gasped, arching his back against the feeling of the cock pushing into him. “S-shit,” he stuttered.
Grinning, Katsuki pulled his hand away from his cock to push on Eijirou’s back, keeping him in the perfect position.
“Don't fuckin’ move, Omega,” he muttered, before finally pushing his cock the rest of the way in.
“A-Alpha!” Eijirou moaned, attempting to grind back against the cock, only for his Alpha’s hand to stop him.
“I said don't fucking move. Are you gonna disobey your alpha?” Eijirou whined, going back into the position Katsuki pushed him into.
“N-No, I'm sorry, Alpha!” He responded. Katsuki nodded.
“Didn't fuckin’ think so.” Then, he slowly pulled his cock out, before pushing it back in even slower. Eijirou whined.
“Katsuki!” He groaned, trying not to fuck back onto the cock.
Katsuki huffed a strained laugh, before doing the same thing. Slowly out, slower in.
“Katsuki, faster!” He whimpered, “Go faster!”
Katsuki hummed, his pace unchanging. “Nah, I don't think so. Gotta earn it, Omega.”
Eijirou whined, squeezing Katsuki's hand. “Please, come on, faster!”
“Earn. It,” Katsuki growled, squeezing his nape in reply to Eijirou's hand. Eijirou froze, before pulling his hand away.
“H-How-!?” Eijirou gasped at a particularly good thrust, panting into his nest. “ How ?”
Katsuki didn't reply, instead choosing to lean down and nose against his scent gland. “Y’ smell like you're in heat,” Katsuki sighed, now slowly rutting into him. “Smell like me, too…”
Eijirou whined, turning his head to the side to give Katsuki more room. Of course he smelled like he was in heat after everything that happened in the last hour. That didn't help him. He just wanted his alpha to fuck him, but he wasn’t .
Submit to our Alpha.
I already am ! , he whined back, furrowing his eyebrows as Katsuki took another deep breath.
No, submit to him. Let me take over.
Is that a thing Omegas did?
Take over? , he asked. Katsuki was spending too much time on his neck.
Just relax, Eijirou…
Eijirou bit his lip. How was he supposed to ‘relax’ with his alpha teasing him like this? If his alpha would just-
“ Eijirou ,” His alpha groaned, “Fucking Christ , you smell way too good right now.”
Suddenly, Eijirou understood. It wasn't that he was submitting to Katsuki. He smirked, although it was small and didn't last long as Katsuki pushed into a sensitive spot.
“Alpha,” Eijirou breathed in reply, although it definitely wasn't him that said it. “Please…”
Katsuki panted, pushing his forehead against Eijirou’s shoulder. “What're you doin’ to me, Ei? Feel like I'm goin’ into rut, goddamnit…”
“Alpha,” Eijirou said again, “Alpha, give me your knot…!” Katsuki moaned, moving his hand away from his nape to grip his hips.
“Ei,” He moaned, “Anything, if you keep smellin’ like that.” Then, still gripping Eijirou’s hips, he pulled out of Eijirou before slamming back in with a satisfying slap.
“K-Katsuki!” Eijirou gasped, hands now gripping at the pile of clothes. “Keep- ah , keep going, please, Alpha!”
Katsuki, surprisingly, obeyed him, nails digging into his hips as he fucked into Eijirou.
"God, you're fucking soaking my bed-,” Katsuki muttered, “Why are you so wet , holy shit.”
“‘S…” Eijirou bit his lip as Katsuki’s pace quickened. “F-For you, m-my a- ah -alpha!”
Katsuki growled, low and animalistic instead of his normal one. “I've never seen this much slick before,” he said, voice deep. “You're gonna make my alpha go crazy, Eijirou.”
“L-Little late,” Eijirou laughed, “M-My Omega’s already… fuck , Katsuki!”
“T-That explains so fucking much,” He said, “Shoulda sent your omega out earlier, you're even tighter tha-than usual…”
Eijirou groaned, pushing his hips back. “Stop talking and fuck me already, Katsuki… want m-my alpha…”
Katsuki smirked. “Your alpha? You want me to let my alpha out, Ei? Y’ might regret it.”
Eijirou groaned again. “Just come on and fuck me already!”
Katsuki’s grip on his hips tightened, then loosened back up.
“Oh, I'll fuck you alright,” He replied. Eijirou grinned victoriously, only for it to be be wiped his face as Katsuki slammed into him.
“A-Ah!” He cried out. Again, Katsuki slowly pulled out of him, before roughly pushing back in. “K-Katsuki!”
“Y’ said…” Katsuki paused to fuck into him again. “You said you wanted my alpha, Ei. Can't blame me if you can't handle it…”
Eijirou laughed breathlessly. “I can handle anything you throw at me, Alpha!”
Katsuki smiled, his nails digging bruises into Eijirou's hips.
“I always knew you could.”