Thread by @0ceanlocked

Let's goo
#OmegaKiriWeek2021 Day 1
CW: marking / size difference / presenting / A/B/O / NSFW / #krbk / mentions of past self-harm / lotsa angst and eventual fluff (as always hehehe)
🎠🎇🌠
Kirishima Eijirou was a late bloomer, and it wasn't what he expected.

He'd always thought he'd present an alpha, even if his wasn't as tall as his alpha friends, actually he was a bit on the short side even for beta standards. But it never crossed his mind that it was because he in fact was NOT an alpha, especially because he put on muscle easily.

It also didn't help his–let's be frank–delusion, that his long time crush and best friend was an alpha that only seemed to be attracted to other alphas, completely ignoring the ocean of omegas and even betas that seemed to drool after one Bakugou Katsuki.

Not that Eijirou had ever thought of making a move on his best friend, to him it was obvious the blond had no interest in him even as he tried to be an exemplary alpha the blond could fall for. After high school they became roommates because Katsuki said it was convenient.

He said they had a good routine and that the fact Eijirou hadn't presented made him a perfect roommate, that not having to worry about anyone else in his territory was what he needed, and Eijirou was more than happy to please him.

It gave him pride, even the faintest hope, to know he was the only person Katsuki ever allowed in his home without hesitation. Not their other friends, not even the alpha one night stands he walked in smelling like in a morning walk of shame. Even if those broke his heart a bit.

So when Katsuki returned to their apartment reeking of omega one night, Eijirou excused himself and locked his bedroom door. He started crying and nothing could make him stop, before he realized what he was doing he was in his ensuite bathroom, staring at his reflection.

He'd been here before, the burn in his wrists, the whole in his chest, the voice in his head telling him he was never good enough, he'd never be enough.

"EIJIROU OPEN THE DAMN DOOR BEFORE I KICK IT DOWN" Katsuki pounded the bathroom door, already having obliterated the bedroom one. Eijirou took a calming breath, or tried to anyways, before switching the lock for Katsuki to barge in right after it clicked.

"I'm okay," the redhead tried to force a smile as the blond checked him for injuries, Katsuki too had been here before.

"No you're not, what was it?" Katsuki asked, but before Ei could even think of a lie his vision blurred and he felt like he'd puke. "Fuck, you're burning up."

Eijirou dry heaved into the toilet but nothing came out, suddenly all he could feel was his body scorching him from the inside out and Katsuki's scent enveloping him. To most, that mix of salted caramel and firewood was too sweet to fit an alpha but to him it was perfect.

"Alpha?" was all he could manage with his now hazy mind.

"Omega..." Katsuki growled and Eijirou purred, he fucking purred what the fuck was wrong with him. "Shit, fuck, you're presenting!" They stared at each other in horror, but Eijirou felt the need to heave, nothing again.

"No I'm not!" He sobbed as Katsuki simply stood by the doorframe, for the first time in his life unsure of what to do to help his best friend. "I'm not presenting! I'm not an omega, I'm gonna be an alpha just like you! An alpha so you can like me..." he mumbled the last part-

but Katsuki heard it anyways and he didn't know what to do with that information, he'd always thought Kirishima didn't look at him like that, no matter how much he wanted him to.

Hell, he'd even come up with half-assed excuses so they'd move in together just to spend more time with his life-long crush. He was so sure his feelings were unrequited and yet never managed to get the redhead off his mind.

Years of sexual frustration and daily heartbreak, having something, someone, he'd always wanted but could never have living with him lead him avoid being at home many a night, too afraid of letting go and doing something he'd regret. That's when he'd discovered the fightclub.

It was a simple mixed martial arts club, mostly full of alphas like himself trying to let off some steam with the occasional omega joining for a class in self defense. Katsuki became a regular and the owner noticed how after getting his frustration out, he was a decent teacher,-

so the older alpha had invited him to participate as his assistant in demonstrations. Maybe eventually teach his own class.

So having the one night he didn't come home reeking of other alphas, and instead of omega after being handed his ass by this badass chick that'd joined a couple months ago, be the night his crush not only presented as an omega but also confessed his feelings was too damn much.

"Take your clothes off." He grunted, Eijirou looked at him with wide eyes, the skin on his cheeks and neck flushing with fever, and the blond blushed furiously. "I mean get in the shower, we need to lower your temperature." Eijirou nodded and tried to stand, except he fainted.

"Fuck!" Katsuki rushed to grab the smaller man, catching him right before he smashed his head against the sink. "Cold bath it is then." He thought for a second before deciding against removing the omega's, his best friend's, clothes. Now was not the time to be knothead and-

think of Eijirou as an omega, as his omega. "Fuck, fuck, fuck." He could feel his alpha growling at him for not claiming the omega right there and then, but he could never do that to Ei, not like this while he was unconscious from fever. Fever, cold bath, right!

He turned the water on in its coldest setting and sat fully clothed with Eijirou against his chest, the water soaking through and washing away some of Ei's now very potent scent and pheromones.

He smelled like fresh lavender, citrus and honey, Katsuki could barely breathe through the intoxicating mixture and distant part of his mind told him it was funny the omega smelled like his favorite tea. He took a deep breath by accident and nearly moaned in pleasure,-

instead he sighed in relief when Eijirou squirmed in his arms waking up, Katsuki placing a hand on the omega's, his best friend's forehead, and noticing the temperature had gone down a bit.

"Alpha?" Eijirou's whisper sent a shiver down his spine.

"Let's get you out and dry."

Katsuki managed to get them both out of the bath and Eijirou out of his sopping clothes, except his underwear of course, before another wave pheromones hit mixed with...

"Oh my god, is that...?" He didn't dare finish the question.

Eijirou was still a delirious feverish mess, Katsuki needed to get him in his bed and get himself a fucking neutralizer so he could help his friend.

He breathed through his mouth, which didn't help much since he could practically taste the redhead's scent, and wrapped him in a towel before basically eating the omega on his bed.

"Stay here, I'll be right back." He growled, it was taking everything in him not to jump him now.

He'd made it to the door before the smell of distressed omega had his alpha clawing at his skin and turning him around as Eijirou whimpered again, tears running down his face.

"Please stay Alpha, I need you... do you not want me?"

It broke Katsuki's heart seeing him like this.

"Of course I want you," Katsuki said walking back to the bed against his better judgement, "fuck, I want you more than anything baby..." he sighed.

"Then claim me!" Eijirou sniffled, reaching for the alpha. Katsuki took his had, put it on his own forehead then kissed its palm.

"I can't claim you right now love," he purred placing Ei's hand on his cheek and leaning into the VERY warm touch, "you're just presenting, your body is going through a lot as is, gotta get you all better first, then we can talk about it... all of it."

"Ngh, don't wanna talk, just want alpha." Eijirou groaned, eyes unfocused.

"How about this, let me get you some medicine and then we can cuddle all night, okay?" Katsuki tried to bargain and when Eijirou nodded, he bolted out the door in search of fever medicine and his shot.

Katsuki got to his own bathroom and shed his wet clothes before stabbing himself with the self-injecting neutralizer and pulling on a clean shirt and some joggers.

By the time he was filling up a glass with water and grabbing the fever pills, the very horny fog in his mind had started to dissipate and renewed anxiety over the situation grew again.

"Fuck this is really happening." He said to himself as he walked back to Eijirou's room.

There the situation had gotten worse, Eijirou was once again covered in sweat, his naked skin covered in red blotches from the heat and his head tossed restlessly in his delirium.

"Ei, Ei, c'mere... you gotta take this." He tried to coax him back to reality but it was pointless.

"Fuck," Katsuki groaned, he grabbed the omega's jaw as gently as possible and dropped the pills on his tongue, then tipped some water hoping he would swallow in reflex, he didn't. Shit, he didn't want to do this. "Swallow" He commanded, his alpha growling at the omega, he obeyed.

"Alpha?" Eijirou opened his eyes and they were sharp and focused on him for the first time that night. "You came back." He sighed with a relieved smile.

"Of course I did, promised I would, didn't I? Silly omega." Katsuki purred allowing himself to lean his forehead against Ei's.

"You also promised cuddles all night." Eijirou mumble reaching out to him, Katsuki too his hand and pressed it against his own forest before kissing the center of his palm.

"Indeed I did." He replied placing Ei's hand on his cheek and relishing the contact.

Katsuki then climbed on the bed wrapping the omega in his arms, caressing the newly inflamed primary scent gland on Eijirou's neck with his nose, enjoying the marvelous scent of the omega with a clear head wa sa wholly different experience.

"Now, my beautiful omega, get some rest." Katsuki purred in Ei's ear, pumping calming pheromones of his own. "Your alpha is gonna take good care of you."

Eijirou drifted to a first restless sleep, but then the meds kicked in and he felt only peace and warmth in his alpha's arms.

On the other hand, Katsuki was damn near losing his mind. He'd never heard of a presentation being this bad, everyone got a little sick when they presented, it was a lot of change all too fast, it made sense. But this couldn't be normal.

He moved to retrieve his phone from his pocket and Eijirou squirmed and turned to snuggle closer to Katsuki's chest, a proud purr coming from his alpha. Katsuki then called the only person he could think could help.

"Hey Kacchan, wassup?" Kaminari picked up, loud music in the background, the omega was out clubbing again.

"Uh... so... Kirishima presented and uh..." Katsuki hesitated, suddenly unsure how to approach things.

"He's half ripped your living room fighting for territory hasn't he?" The other blond laughed. "I always figured he'd turn into a rowdy af alpha..."

"He's an omega." Katsuki blurted flatly.

"GET THE FUCK AWAY FROM HIM. NOW" Denki hissed. "I'll be there in ten minutes!"

"Calm the fuck down Denki, I took a neutralizer, I'm good!" Katsuki growled back and Eijirou squirmed, so he tried to calm dow so as to not waking him. "Also how dare you think I'd ever do something to him?!" He hissed.

"Shit, you're right." Denki sighed, the music in the background having died down, meaning he must be outside. "Sorry, don't got the best experience with alphas and vulnerable omegas."

Katsuki could never forget. Regardless of his empty infantile threats during his adolescence, he'd never actually wanted to murder anyone, until that fucking asshole. It's taken his friend the better half of a year to start healing from what the excuse for an alpha did to him.

"So why are you calling?" Denki asked.

"He'd got like a really bad fever." He started.

"Dude you just gotta let it run its course, you know how it is... wait, what do you mean really bad? Didn't you take his temperature?"

"He barely let me get away long enough to get my shot and some acetaminophen, he's delirious and I had to command him to swallow the damn pills and..."

"YOU DID WHAT NOW?!!" Katsuki pulled his phone away from his ear at the yelling, yup, he definitely shouldn't have said that.

"HOW DARE YOU FUCKING COMMAND HIM?! LET GO OF ME HITOSHI!" Katsuki could picture the omega going ballistic in one of his boyfriends, hell he could even feel the sting of the slap on his cheek the next time he saw the other blond. "Go get Tetsu, y'all are dropping me off at Ei's."

"I had no choice Denki," Katsuki all but whimpered, he already hated himself enough for having done it. Though commands weren't necessarily illegal, they were something most of society had deemed barbaric and cruel seeing as omegas could never refuse them. "He needed the meds."

"How is he right now?" Denki said after taking a deep breath.

"He's sleeping, temp's gone down but he's still pretty warm. I... I can't bring myself to leave his side Denki..."

"Of course not, bet the whole apartment reeks of distressed omega," Denki grunted,-

"We'll pass by the drugstore on the way. Do you have more neutralizers?"

"No, I only kept the one for an emergency." Katsuki realized how much trouble he'd be in if the tiny blond didn't offer to come over.

"Thank you Denks." Was all he managed and the line went dead.

About 15 minutes later he was still unable to move from the omega's side, and he'd never been more glad to have given the blond omega a spare key so he could water the plants when Ei and him traveled home to visit their parents than he was now.

"Okay, I'm here, let me take his temperature." Denki demanded as he walked into Ei's room carrying a bag with supplies. He was not half a meter away from Eijirou when Katsuki growled at the other blonde. "I swear to god if I find out you claimed him, I'll castrate you myself."

Katsuki winced, mostly at his own behavior than the threat of bodily harm, and made way for the omega to examine his patient.

If there ever was a silver lining to the horrible experience Denki suffered, was that he'd found a passion for helping other omegas and sought out a nursing degree, volunteering most of his free time at omega clinics and shelters. He'd become a force to be reckoned with.

"It's what I thought, he's an anomaly." Denki stated after checking up the new omega's symptoms. "I mean, we'd need a lab test to confirm it officially but it checks out."

"What do you mean anomaly?" Katsuki managed out, renewed worry flooding his senses.

"Abnormal presentation," Denki stated as if that made any more sense, "as in he all but seemed like he was gonna present one way as he hit puberty, but then he never did and now here we are.-

It's like a recessive gene or something, kinda rare too, most kid doctors don't think to check for it." He kept talking as prepped an iv bag and attached it Eijirou's arm, strapping the bag to the bed post, Katsuki tipped his head in question.

"To keep him hydrated. I've never actually seen an anomaly before, but apparently when they do eventually present it's hella worse. Especially because of how traumatic it is psychologically, the whole getting blindsided by your own body thing, can get pretty messy."

Katsuki actually whined when he heard that.

"God, calm your tits dumb alpha, even on neutralizer you're stinking up the place." Denki fan himself with pretend disgust, but then patted the other blond's head. "Ei will be fine, he's got an entire pack looking after him. Now..."

Kaminari proceeded to give him instructions on what to do and when for the rest of the night and up until his shift at the clinic was done in the afternoon, saying his boyfriends were waiting for him downstairs.

"My dumb alphas refused to let me stay the night tending to him, some wimp-ass argument that I too need rest or some shit. Told them I'll sleep when I'm dead, but then they threatened to escort me up here too, which was THE worst idea seeing as you growled at me when I arrived."

"Sorry, again..." Katsuki mumbled.

"It's okay, figured it was about damn time anyway." The omega said by way of goodbye as he closed the bedroom door behind himself, leaving Katsuki utterly embarrassed, how did he know about his feelings for Ei? Was he that obvious?

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After what felt like the worst and longest night of his life, Katsuki woke up still exhausted with somebody clinging to his shirt, the scent of his favorite tea engulfed him entirely mixed with an all too sweet smell of...

"Morning alpha..." Katsuki's eyes opened at the voice.

"Eijirou!" He gasped, peeling himself away from the omega, equal parts relieved to see his best friend away and embarrassed at his very obvious morning wood. "How're you feeling?" He asked, checking for any signs that the fever might've returned.

"Hungry..." Eijirou answered and his expression was absolutely sinful, Katsuki started crawling backwards on the bed just as Eijirou crawled toward him and the blond felt what a zebra must feel when being hunted by a lioness. "Ouch." Eijirou whined when he pulled at the iv.

"Ah yeah, Denki put that in," Katsuki blabbed as he got off the bed, "it's a good thing you got an appetite, gonna go make you some breakfast!" Katsuki scurried out of the room, closing the door behind himself as he heard Eijirou groan in annoyance inside.

He took his time in the kitchen, making Eijirou's favorite breakfast foods while also making sure to add enough nutrition rich dishes. Half an hour later he carried a tray of miso soup, eggs and a stack of bear-shaped-pancakes into the sweet smelling room.

Eijirou perked up as the blond walked in, but then his smile faltered and he hugged his knees.

"I'm so sorry Katsuki." The redhead burst into tears the moment he set the tray on the bed.

"Whatever the hell for?" Katsuki asked drawing all the curtains and opening the windows.

"For last night, I promised I'd never do that again and..." He replied still sniffling into his knees.

"And you didn't, so there's nothing to apologize for." Katsuki cut him off after making sure fresh air was flowing in, clearing out the pheromone heavy atmosphere.

"Now why are you really crying?" Katsuki asked, approaching the redhead. "better not be about something else you shouldn't be apologizing for."

"I'm an omega." Eijirou muttered in the softest of whispers.

"Perfect omega," Katsuki purred into his friend ear.

Shit, he needed another neutralizer, now.

"C'mon, eat up, food's getting cold." Katsuki tried to compose himself, reaching for the bag Denki brought the night before and stabbing himself with the self-injector through his pants, god he needed to stop being a dumbass. When Eijirou didn't moved the blond sat next to him.

"We gotta talk about last night," Katsuki sighed and Eijirou shivered so the blond reached for the tray pulling it closer to them, "I need you to get your strength back and to listen to me okay?" Eijirou nodded and let go of his knees in favor the the cup of soup Katsuki offered.

"First of all," Katsuki started "I gotta say I've been an absolute knot headed idiot. To think it took me this long to realize my feelings for you were not one sided."

"What?" Eijirou nearly choked on the soup.

"I'm saying that I love you." Katsuki grumbled with a blush.

"Katsuki what..." Eijirou couldn't fully process what was happening, "I thought... you never... but you don't like omegas?"

"What... how did you even come up with that?" Katsuki sat perplexed next to him, what in fuck's name was going on.

"I... all your one-night stands?" Kirishima stuttered, equally perplexed. "You've been coming home smelling like a different alpha almost every night recently and..."

"I told you about my fight club" Katsuki cut in again, eyes wide, there's now way...

"I thought it was code..."

Yes, there was a way. Katsuki didn't know if to laugh or cry right then, for months now he's been hurting the most important person in his life without even knowing, coming home smelling like alpha and last night... Oh no.

Last night had been his fault.

"I'm so sorry Ei," Katsuki's eyes prickled, he felt like the shittiest person, the shittiest alpha on the planet. "You're the only one for me, always have and always will."

He took the omega's hand and kissed his palm like the night before, this time sending electricity through Eijirou's body. "Please forgive me." Like last night Katsuki once again place Eijirou's hand on his cheek, leaning into the soft touch with a purr.

Eijirou's own face mimicked his hair, a feeling he couldn't quite name rising in his chest as did heat pool in his belly.

"Alpha," he sighed leaning toward the blond, their foreheads touched as he closed his eyes and his omega purred inside him. "I've wanted this for so long..."

Eijirou then pulled the blond into a bruising kiss, all too desperate to get them closer to each other. Katsuki actually moaned into his lips before grabbing him by the shoulders and pushing them apart, causing Eijirou to whine.

"We still have to talk baby." Katsuki sighed.

"I'm done talking," Eijirou mumbled, pushing the blond backward and straddling his waist, "want you now." The redhead then clashed their lips together again, getting lost in the sensations of his own body responding to the alpha, his alpha.

Katsuki blessed modern medicine, if not for the neutralizer he was sure to be lost in the elixir of Eijirou's scent. He flipped them and pinned the redhead's hands on the bed, causing him to try and fail to fight the alpha. After a moment, he gave up with frustrated whine.

"Eijirou, we /need/ to talk." Katsuki sighed yet again, it was almost as useless to talk to him then as it was the night before. "Maybe we should get to a less... tempting location." He added climbing off the bed and taking the food tray with him. "C'mon let's finish breakfast."

Eijirou groaned but followed the blond out of his room, Katsuki's phone ringing then.

"Yo," he answered, "yeah he looks fine now, maybe a bit wired up but more like himself. Shut up pikachu, who do you take me for?! Then get off my back about it. I'll keep you posted."

"S'that Denki?" Eijirou pouted as he sat and took a few bites of his pancakes.

"He says hi." Katsuki answered, stealing a bite of Eijirou's eggs.

"What's it you wanna talk so much about." Eijirou grunted.

"About last night, about us." Katsuki replied, tucking a strand of Eijirou's hair behind his ear, unable to stop himself from caressing his cheek as the redhead leaned into the touch.

"What's there to talk about?" Eijirou whined again, when had he become such a crybaby, he thought to himself before adding, "you're my alpha and I'm your omega, and we love each other, what else is there?"

Katsuki didn't really have an answer to that.

"Are you sure this is what you want?" Was all Katsuki managed, too unsure how to ask what he really wanted.

"Yes!" Eijirou replied, "more than I've ever wanted anything!" He then hesitated. "Do you not?"

"Yes, baby, more than anything! It's just..." He was so embarrassed.

"It's just what?!" Eijirou was growing exasperated with the alpha's vagueness.

"I commanded you last night." The blond said almost inaudibly.

"Yeah, you made me swallow some pills, so what? Got my fever down, didn't it?" Eijirou crossed his arms, clearly missing the point.

"It's what I could've made you do." Katsuki blurted, eyes burning all over again. "I don't deserve you after doing that to you."

"Oh cry me a river, you basically saved my life."

"/After/ triggering your presentation in the most horrible way possible!"

"Did not!" Eijiro retorted.

"Did too!" Katsuki cried.

"God you're impossible!" Eijirou got up and sat on the alpha's lap. "Why do I even like you?" He asked under his breath before kissing the blond again. "Now you listen, dumb alpha..."

"Even with the whole bathroom incident, and you commanding me to swallow those pills, I'm thankful for last night, it got us here." He leaned into his alpha's neck, moaning at the sweet scent of caramel and bonfires.

"Now, all I want," he added pointing each word with a kiss up the alpha's neck until he reached his scent gland. "Is for you to stop whining and fuck me on this table already." He finished lapping directly at the gland, letting out a decidedly sinful moan at the taste.

"Fuuuck." Katsuki groaned, hips bucking up against the omega's. "Are you..." He got cut off by sharp pain on his neck. "You bit me?!"

"If you ask me if I'm sure one more time, you won't like the next thing I'll bite." Eijirou groaned. "Now either knot me or leave the ho..."

He couldn't finish the thought. Katsuki pulled him into a hard kiss, nibbling on Eijirou's bottom lip, then moving on to leave wet bruises and bite marks from the redhead's jaw to his clavicle. All the while the omega becoming putty at the alpha's hands.

There was only one thought in both of their minds: claim.

"Alpha..." Eijirou moaned when Katsuki sucked a bruised directly on his primary scent gland, shivers running down his spine at the scent of pure arousal coming from the blond, "want you... want your knot..." the redhead gasped feeling the swelling cock under him.

He ground his hips against it and both moaned at the friction. Katsuki the clawed at Eijirou's boxer clad ass groaning while still latched on the omega's scent glad, at this point he doubted he'd ever let go, he tasted so good, too good.

Eijirou was slowly losing it, trying with all his might to rip off the alpha's close and failing miserably, as was the alpha... until he wasn't. The omega yelped as cool air hit his ass, followed by warm calloused fingers kneading him like he was freaking bread.

The redhead groaned in frustration, forcibly pulling the alpha off his neck so he could get his attention.

"Clothes, off." The omega ordered in between pants and Katsuki was happy to oblige. The alpha easily lifted the smaller man and sat him on the countertop.

He then pulled his shirt over his head and dropped his joggers unceremoniously, his massive cock springing free and Eijirou's eyes zeroed in on it. He'd never noticed before, but the alpha was the definition of a grower.

At the base of it the hint of knot was already forming.

Katsuki ripped the remnants of Eijirou's underwear from his legs and sank to take the omega's way smaller cock into his mouth. Eijirou all but screamed at the warmth surrounding him, clawing at Katsuki's hair unable to tell if he was pulling him up or pushing him down.

((ok I know I didn't tag this but they're both twenty something year old virgins cause they were way to obsessed with the other to ever try anything with anyone else, let's enjoy the awkward first time sex together 😜))

"Kat... Kat! I'm gonna come!" Eijirou whimpered, embarrassingly fast, as Katsuki swallowed him whole with no effort. Hell he was sure his dick wasn't even hitting the alpha's gag reflex, what with their ridiculous size difference, and somehow that thought sent him over the edge.

Eijirou's orgasm had him half falling off the counter as he emptied his load in the alpha's mouth. Katsuki swallowed the whole of it, sucking at his cockhead as if to make sure he'd gotten it all and Eijirou whimpered from oversensitivity.

After composing himself for a moment, Eijirou noticed the previously clean countertop was now soaked with what he could only guess was his own slick.

"Well, at the very least we're gonna save a lot on lube." He didn't know what on earth compelled him to make a joke at a moment like this but it didn't matter. One second later the alpha lifted and carried him back to his own room.

There, Eijirou was enveloped even more by his alpha's scent, being in his den made his mind hazy with lust again. Katsuki all but threw the omega on his bed climbing on top of him right after, kissing the redhead in a frenzy with half a mind to open his drawer and grab a rubber.

Eijirou clawed at his back and when the taller man pulled away to gather enough focus to roll the condom on his painfully hard dick, the omega bit him on the neck, hard, which only caused him to growl as his dick throbbed in pleasure.

"Claim me, alpha." Eijirou whispered in the blond's ear, nibbling at his lobe and relishing the shiver that coursed through the alpha.

"I need to open you up, omega." He growled, suddenly unsure if he actually needed to.

Before, when he'd fantasized about having sex with his best friend, he'd always thought he'd also be an alpha so he learned about that. He had absolutely no clue if sex with a male omega was the same as with a female one.

Not that it mattered much cause he didn't know about that either. He didn't realize he'd frozen in place until Kirishima talked to him.

"Hey Kat, are you okay?" when the alpha stopped moving the horny haze in his mind lifted enough to notice something was wrong.

"Have you ever done it?" Katsuki blurted out, not really sure what he was asking or if he wanted to hear the answer. Just because Eijirou was the only one for him and he never bothered to try with anyone else, didn't mean it was the same for the omega.

Hell, being unpresented as an adult /had/ to make hooking up a lot easier, less damned hang ups for everyone involved.

"Done what?" Eijirou was confused, where was this all coming from?

"IT, had sex?" Katsuki repeated exasperated.

"Like with another person?" Eijirou whined, the frustration of a stifled second orgasm building up in his tone.

"What do you mean with another person? Of course! What other type of sex is there?" Was it wrong that Katsuki angry at him being willfully obtuse turned him on more?

"I mean... I've played with myself..." Eijirou feigned an air of innocence, "You should see my little collection, I bet we could have fun with it." He pulled Katsuki by the nape licking a stripe behind his ear as he whispered. "But no, I've never been with anyone."

With that Eijirou leaned back on the bed, seeing as the alpha was still frozen in place, he took matters into his own hands. Literally. He made a show of caressing his own body with delicate touches, giving himself goosebumps in the wake of his nimble fingers.

Eijirou pressed on his scent gland, getting it to released clear pheromone liquid that he then spread all over himself. He kneaded his sculpted chest, flicking and pinching his nipples as little moans escaped his lips.

Then he brought his had down, stroking his once again hard little cock a few times before bringing his hand further down with a loud moan as he felt the wetness of his entrance. That was definitely new and he loved it already.

Katsuki's mouth went dry but he pressed on.

"What, think your plastic dicks are gonna impress me? they can satisfy you better than I can?" Katsuki had definitely lost his mind, here he was between /his/ omega's legs and instead of fucking him five ways to Sunday he was asking questions about his sex toys.

"Dumb alpha," Eijirou smiled in a way that was both angelic and devilish, "they're not that kinda toys..." he lifted his had to Katsuki's cock and moaned when he could barely wrap half of that monster cock with it. "I was saving myself for you..." he purred, that was all it took.

Katsuki's growl could've scared anyone else, but to Eijirou, it had him gushing slick. He could see the exact moment when his alphas instincts took over and yet even then, the mountain of a man treated him with a gentleness the omega half resented and half loved to bits.

The alpha pinned both his wrists with one giant hand while he maneuvered Eijirou's legs as wide as he could get them with the other. This was the closest the blond had been at manhandling him and the omega loved every second of it.

((Ohoh maybe I should tag: edging / loss of virginity ig / just feral fuckery in general at this point idk I suck at tagging / oh and katsuki has a bit of a sadist streak, but very mild, very vanilla trust))

He whimpered at the intrusion of a single digit inside him and Katsuki easily worked him up to a moaning, panting mess before stopping and reming it. Eijirou whimpered eyes burning at the frustrated orgasm but before he could protest he felt the pressure of two finger on his rim.

His fingers opened the omega so easily, he couldn't be sure if he was more mesmerized or disbelieving about whether he'd truly saved himself for the blond. His alpha yelling at him to claim the omega already, make sure nobody ever dared even think of touching him like this.

When he saw the small body underneath him tensing up, he pulled out his fingers yet again, he wasn't completely sure why, but seeing the omega writhing with ruined pleasure had his dick throbbing like crazy.

He skipped from three to four fingers and he growled when Eijirou all but seized in pleasure whimpering and tearing up at the sudden intrusion. Before he worked himself up again though, Katsuki had some mercy and pulled them out and lined himself up.

"I love you Ei," he exhaled as his cockhead nudged against the omega's entrance, realizing not even four fingers would've been enough stretching. Eijirou was tight, and his alpha growled with pride knowing he was the first and only to claim the omega. "Mine!" he couldn't help it.

"Yours, only yours, love you alpha, love you Kat..." Eijirou repeated variations of what now could've been a mantra as he felt his body stretch wide open for the love of his life. When the head popped in the pressure turned to pain and he whimpered, tears rolling down his cheeks.

"Ei? Ei baby what's wrong? Does it hurt? Should I pull out?" Katsuki blabbed, drool running down his cheek as it took everything in him to still his hips, which he'd already been holding back from simply slamming home and splitting the omega open.

"No!" Eijirou whined, scrunching his face and biting his lip, clearly trying to breathe the pain away. "I can take it, just... kiss me?" Katsuki considered pulling out for all of half a second, blue balls be damned before realizing Eijirou really wanted this so he obliged.

Katsuki peppered the omega's face with chaste kisses, licking the few tears still on his cheek before gluing their lips together in a slow, passionate kiss. He felt Eijirou's tongue prodding his lips open so he let the omega take the lead as he started inching inside him again.

The omega moaned against his mouth and Katsuki's hips stuttered, eliciting the filthiest sound he'd ever hear, god did he want to just plow the omega right there and then. But he knew if he did that, he'd actually probably hurt his love and he couldn't have that.

When Katsuki finally made it all the way in, they were both shining with a thin layer of sweat and trembling at the sensation. Katsuki trailed his hand down and moaned when he felt the bulge of his cock in the omega's abdomen, he pressed down and Eijirou screamed.

The alpha looked between them and saw Eijirou's spent drying on his stomach, he'd lost count how many times the omega had come while basically being impaled by the alpha at a torturous, slow pace.

When Eijirou seemed to come back to reality Katsuki kissed him softly on the lips.

The omega smiled, too content and full to care about anything else than feeling this way forever.

"You can move now alpha." The realization that what they'd done until then was basically foreplay didn't hit him util his alpha couldn't hold back anymore.

Katsuki would swear to the day he died that he tried to go slow, he did, but after the first couple of practically dainty thrusts, his alpha was clawing off his skin, growling that his omega could take him. And boy could Eijirou take it.

He didn't know when but at some point he'd gotten Eijirou into a mating press, fully folding his body in half like a rag doll as he pounded mercilessly into the omega, whom had lost his ability to form coherent words simply moaning and whimpering, with the scarce 'alpha'.

Katsuki was so lost in how well his omega could take him, how his walls contracted around with wave after wave of pleasure brought by the alpha that he could tell exactly when it happened. He stilled his hips for a beat relishing in the new, unshielded sensation.

"Keep... going..." Eijirou managed out in between ragged breaths, clamping down on the alpha's cock and causing him to groan at how good it felt this way.

"But it broke," he started protesting but the omega simply pulled him down and bit his shoulder, painfully.

"Told you, you wouldn't like it if you asked me again." Eijirou said looking clear headed for the first time in what felt like ages ago. "Keep going. Claim me, alpha." He bit down again, this time closer to Katsuki's scent gland and the blond actually lost it this time.

It didn't take long to feel his knot start to catch on the omega's rim, Eijirou returned to a state of repeating a mantra of "It's too much I can't, no don't stop dumb alpha, please claim me I'm only yours!" all while Katsuki could only grunt and moan "Mine!" every now and again.

In between such promises, Katsuki's knot finally popped and Eijirou would've screamed at the stretch of it, had it not been follow by scalding hot ropes of come filling his insides as sharp fangs injected pheromone laden saliva into his scent gland.

Katsuki had claimed him.

🎠🎇🌠

Continuation below! (I have no idea why I'm doing this as separate threads but bear with me this was supposed to be a drabble a day for omega kiri week not a whole ass fic 😂😭 sorry not sorry hehe) I'll add the whole /edited/ thing to AO3 later on!

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