Pairing: ProHero!Alpha!Kiribaku x Omega!Reader
Type: ABO Dynamic, Angst, blood, SFW
Word Count: 2900+
A/N: Seeing how everyone is loving “Welcome Home Omega” I decided to do another omegaverse fic this time with lots of angst. Thank you so much for all the kind words, reblogs, likes and follows. Was thinking of making a Part 2 for this? What do you think?
Summary: Omega y/n returns home to her alpha’s after being away in Europe, thinking she would be able to re-join her alphas and be happy. Only to discover they move on without her.
Part 1 / Part 2 / Part 3
I collect my suitcase from baggage claim and make my way towards the arrivals gate. It has been an incredibly long 8 years since I’ve been back home in Japan. After graduating UA with all my friends, I decided I needed a new path, something exciting that didn’t include my alphas. Being away from my family and friends has been one of the most difficult things to go through and more importantly being away from my alphas. It was nice to be needed and not just because of my second gender.
After graduating UA, I joined Fatgum’s agency and from there I met Jackie one of fat’s previous partners on the drug squad. She needed a bright new hero that wanted to work outside of Japan and head off a special unit in charge of investigating quirk enhancing drugs. At first everyone was onboard and excited fir me but as time went on, it was becoming increasing hard to keep in contact with my busy alphas. So, one Christmas, two years into the job we all agreed to stop dating and put our relationship on hold, until I was finished with the special unit or until one of the alphas said enough, come home. I agreed happily, never thinking I would get the come home call, but here I am. I left Europe and returned home.
The doors of arrivals opened in front of me, I look around the barrier hoping to see either of my boys, Bakugou or Kirishima, but neither blonde nor red head could be seen. I walk the corner a small bit, thinking they might be hiding but nothing. I spot movement in the distant, a blur of pink rushing to my arms, knocking me off balance.
“YYYY/NNNN, I CAN’T BELIEVE YOUR HOME” Mina sobs into my ear. “Mina” I say back hugging her tightly. Out of everyone in UA Mina stayed in constant contact with my updating me on the group’s latest gossip and everyone hero’s ranking. “Come on, lets get you home” She speaks again, taking one of my bags and my hand in hers. I smile to her and gladly accept her hand. Mina is an omega like me, after UA her and Sero got together and currently have a beautiful house and a serval fluffy cats. Once we reach the car and start our journey. Mina tells me of everyone, what they are doing and what is planned for my coming home party tonight.
“Wait, slow down, where are you taking me first” I say, laughing at her excitement. With her hands on the car wheel. She says “Bakugou and Kirishima’s” I pause for a second. They must just be living together and not actually still together without, right? They wouldn’t betray me, would they? These thoughts are fully my head, maybe coming home wasn’t a good idea. I should have ignored the “come home” agreement. What if they just want to use me to have their kid and toss me aside.
“Y/N, please say something, you made me promise not to talk about the boys when were away and right now you’re kinda scaring me.” She presses.
“I’m… just thinking. So out with it tell me what has been going on, why are they living together.” I asked shifting in my seat to look at her and she drives down the straight road.
“Okay, so it started whe….”
Mina basically said what I thought she might after I left fully and didn’t come back like we agreed. Kirishima and Bakugou stopped for a while, they didn’t live together, socialise or anything but after Kirhisma was badly injured in a battle, they moved back in with each other and kept their relationship quiet, it’s been 6 years, that they been together while I have been alone.
“So that’s basically all of it y/n, I’m sorr…”
I cut her off, “Mina this is not for you to apologise for, you kept your promise to me and now I must face the music as they say in Europe.” We had arrived outside their house ages ago, but we ended up talking. I step out of the car and move to grab my bags. I look up to the house, it’s huge and white. Very modern and what’s looks to be very expensive. But what can you expect from the Number 1 and Number 5 heroes in Japan. Mina steps out and comes to my side of the car to hug me goodbye and to tell me the information for tonight. Just then the front door opens, Kirishima steps out with a huge grin on his face. He has changed a lot since I left. He is like a wall, thick with muscle and sporting a high red ponytail.
“There she is,” Kirishima says, holding out his arms as he makes his way down the path towards me. I drop my bags and run to him. I can be anger later, but right now I need this hug. “Here I am,” I say back to him, I took my face into his neck to breathe him in, he tries to do the same but it is unable as I have my marks and scent glands covered as Europe has different rules than us. I can sense the confusion and say I will explain later. Kirishima greats Mina and they discuss briefly about this evening's plans and Mina is off on her way, waving goodbye. With his arm around me, he guides me inside towards the kitchen. We each stand on opposite sides of the Island, not knowing what to say first.
“So, where’s Bakugou? I thought you would both be at the airport” I say frankly to him, showing my frustrations. “He had to work, but he should be back home soon,” Kirishima replies shuffling his feet. I stare at him, I want to voice my anger, I want him to know how much I hurt, I need to do this with Bakugou. “Okay” I reply looking at my bags, why did I come here, why did I think we could go back to normal. “He’ll probably be late like always though, why don’t show you to your room and you can get ready for this evening” He smiled at me, like he trying to form an olive branch between us. I nod and follow him out of the room and up the stairs. All around me are reminders, parties I could not attend, award shows I missed but right now I can’t dwell on that. My time in Europe was the best experience of my life and right now I want to go back. Kirishima leads me to a guest room and leaves me to get ready. I sigh, this is going to be difficult.
Doing the finishing touches to my hair, I smooth my dress down as I look in the mirror. I’m wearing a tight-fitting black dress, that is off the shoulders. I rub my hands down my neck, wishing I could have had the surgery to remove my mark guards yesterday before I came home. Just to show them, that I kept my promise to them. I hear noises downstairs, Bakugou had arrived home ages ago but did not even come to say hello, just went straight to the shower. Although I know what Mina told me was true, I needed proof if I was to enter an argument with Bakugou. I walk a small bit from my room trying to stay quiet, I turn a corner and see a wall of photo frames, most are from UA and some are from Dates we three had together. The difference, I was no longer in the photos, I was cut out. You could see my arm or a sliver of my hair and maybe an eye. I felt rejection, my inner omega whined. Why would they do this to me? I ripped the frame from the walls and marched downstairs. My heels clicked on the floor beneath me. I rounded the corner and enter the kitchen not bothering to wait for their conversation to finished. I throw the frames onto the countertop and look up at both of them making eye contact. If I wasn’t so mad and hurt, I would be shocked at how mature and sexy they both are right now. Kirishima's hair is half up, half down being supported with braids and he is in a maroon shirt opened slightly. Whereas Bakugou wears a white shirt and supports an undercut. My alphas have matured, I suppose I have as well.
Kirishima looks at the frames and stays quiet. Bakugou does not dare to break eye contact with me.
“So, let me get this straight. I leave home, to become great in something that is bigger than me. I leave my alphas with an agreement, that we all would hit pause, and eventually I would come back or get a called from either of you to come home. I follow the rules, and it seems to me what I got in thanks was to be cut from your lives.” I raise my voice, guesting to the pile in front of me.
“tck…” Bakugou replies and looks at Kirishima.
“Don’t tck me Bakugou, it seems to me that I’m not even wanted here anymore, so why was I called home, let me guess you need an omega to have your child and then I’m to disappear,” I respond. “No that’s not why we called you back” Kirishima speaks up, slightly walking towards to appear less hostile.
“Funny how you call us your alphas but yet, our marks, our bond is no longer on your neck,” Bakugou responds, pointing towards me. “They are not gone, they are covered by a skin slip, in Europe is safer to have them covered in case you are kidnapped and forced to bond with someone,” I say back to him. “Omega, please let us explain, I understand your hurt, but we want you still, your part of our family,” Kirishima replies placing a hand on my elbow. I jerk away from him.
“So, all this time, when I was away, suffering through my heats alone. Omega depression after omega depression. You two, were what? Together happily rutting away.”
“Yes, how do we know you never had it off with anyone else,” Bakugou said leaning on the Island in front of me. “Bakugou, don’t say that -” Kirishima scolded him. “- we don’t think that y/n”. I stand there shocked; I can sense he is hurt but right now I will not be his vent.
“ah, I see, I was away fucking my way through Europe apparently and my alphas decided that instead of coming to see me and to tell me. They went behind my back” I stare at Bakugou not daring to back down. “How do we know you weren’t, how do we know you didn’t get our marks removed?” Bakugou asked.
I scuffed and turned out of the kitchen, towards my bags that were left at the bottom of the stairs. Both Alphas stayed in the kitchen and spoke to each other. I opened my bags and reached into it to find a wrapped plastic bag. I walked back into the kitchen, hearing Bakugou raising his voice at Kirishima, “I can’t Kiri, you almost died.” Kirishima hushed Bakugou as I re-entered the kitchen. I threw the bag at Bakugou.
“Go on, open it -” I say with my hands on my hips. “- There’s your proof” I stand and watch it. Bakugou opens the bag and pulls out two jumpers, one of his and one of Kirishima’s. Their scent has well worn out but mine could be smelled. Years of being alone, years of depression, laid in their hands. Kirishima’s eye watered. “This proves nothing, maybe if you weren’t lying about our mark being gone, we wouldn’t have this problem,” Bakugou said, dropping the jumpers on the countertop. “What do you want me to do, perform surgery right now, you know once you never doubted me” I laugh under my breath.
“Yeah well once, you weren’t such a slut, betraying your alp-“Bakugou responded but Kirishima stepped in creating a barrier between us. Tears started to form in my eyes, my vision blurred. Fine, if Bakugou wants proof right now that I was loyal then fine, I’ll give it to him.
I look at my nails and smile to myself, I thank whatever god is listening that I have long pointed nails today. Kirishima is currently speaking to Bakugou, standing in front of me. I can no longer hear him. All I know is, those skin slips have to go now. I take a deep breath in and dig my nails into my neck around where the stitched used to be. I whimper, both can smell blood and turn to look at me. I rip the slip from my skin, blood starts to pour from my neck but nothing that would majorly hurt me. I reach for the other and dig my nails in. “Y/n stop, what are you doing” Kirishima reaches to stop me, but he’s too late I pulled the other off and make eye contact with Bakugou. “You wanted your proof, here you are Bakugou, take a whiff I have NEVER BETRAYED EITHER OF YOU” I scream, throwing the slips onto the counter and storm off.
“Omega come back now” Bakugou shouts after me, I can hear him chase me and reach for my arm. I pull it forward and turn to face him. Tear are leaving my eyes, ruining my makeup, my dress ruined from the blood. “What Katsuki, you believe me now? What do you want from me, why are you mad?” Bakugou stands in shock, unable to talk. “ANSWER ME NOW,” I scream again. Bakugou reaches forward grabbing my arms, tears forming in his. Kirishima was leaning on the door behind him.
“HE ALMOST DIED, AND YOU WEREN’T THERE, I WAS ALONE, WATCHING HIM DIE AND YOU WERENT THERE, YOU PROMISED ME I’D NEVER BEEN ALONE, AND YOU LEFT ME ALONE WAITING FOR HIM TO COME BACK” he roared at me. I shoved Bakugou off me.
“I CAME HOME WHEN EIJIROU WAS IN HOSPITAL” I shouted back, both alphas heads shot straight up and looked at me. “I was there, I broke me promise to stay away until I was asked by either of you to come home. But I saw the fight, I saw Eijirou get knockdown and didn’t get back up. I hopped on the nearest flight and came home. You need proof, ask Fatgum, Denki, Tamaki, Deku.. anyone who sat in that waiting room.” I said looking into Bakugou's eyes. Kirishima walked forward to join us. Bakugou went to speak. “No you let me speak, I was there. Kirishima opened his eyes and called me an angel and then you shot into the room in a panic and threw yourself on him. Bakugou you looked in my eyes and didn’t say a word, so I stepped back, you saw me there, you. Don’t blame this on me. Knowing how angry you would be, Deku came and got me, promising to watch over both of you.” I stopped to wipe the tears from my eyes.
“How dare you hold that over me Katsuki Bakugou,” I say to him, Kirishima reaches for my hand as if to pull us all back together. I step back, I need to breathe to get out. I walk about the front door, grabbing my handbag. “I’ll see you at the party, some welcome home this was,” I say not looking back and slam the front door.
I walk down the path and reach for my phone, dialing Mina’s number. “Hey girly, I’m just about to leave for the pub,” Mina says down the phone. I start to cry and sit down on the curb. “Sero, wait a second” Mina whispers away from the phone. “Y/n, what’s happened, what’s going on,” She says again her voice has lowered. “Mina I need some help; I can’t see everyone looking like this,” I say back to her. I cry again, I can hear the door behind me open and I stand. I turn and see Kirishima, “Y/n wait please, come back in, we can sort this out,” he says, and I look over his shoulder. Bakugou is frozen in the same spot, staring at the floor. “I’m almost there, start walking to me,” Mina says and hangs up. I bend down and undo the straps of my heels, steeping out of them leaving them on the step. I start to run down the street, I need some quiet, I need to think.
“OMEGA STOP” Bakugou shouts behind me, but I can’t. I see Mina’s car and run towards it.
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Shigaraki growls lowly at you, staring into your cage as you bow to the floor in submission. You whimper, your cock dripping almost as much as your cunt.
"Omega." Shigaraki lets out a rutting growl, you whimper again, looking at the open door to your cage nervously. "Come here, Omega. Come now!"
You whine softly but wiggle along the cold, metal floor of your cage until Shigaraki can wrap his hands underneath your arms and pull you into the air. Only wearing a white mini-skirt, your short and thin dick was a telltale sign of your secondary gender - even if most people (Betas) couldn't smell you sweet scent that rolls out you.
"Do you know why you're here, Omega?" He growls to you roughly, eyeing your scent glands as they swell because of your triggered heat. "Do you know why you are here?"
"B-Because you w-wanted me to be." You mewl at him, he smiles darkly, and more slick drips down your thighs as he pulls you close to his chest. You stumble a little when your feet fit the carpeted floor of his freshly-cleaned den. "Alpha, you smell so good!"
He purrs, the sound deep and rough and a carnal and ancient call to something deep inside you. You go limp against him, your (e/c) eyes staring at him with wonder as he gently nuzzles your nose. Even with his jeans loose and heavy on him, you can feel his hardened cock straining.
"Tell me how good, Little Omega." He growls, his hands gently massaging your slim waist, you whine and buck against him, his four fingers not close enough to either of your genitals to sate you. "Omega, tell me."
You almost cry from want, but you babble and blubber about how you could smell him all the way in the car Giran drove you here in, how powerful he felt, how secure he made you feel. He purrs so hard he can barely hear you as you beg him to mate you, to knot you, to make you part of his power. You bawl about how he's so big, how he'll have to stretch you lots, but you'll be a good Omega, you swear.
Finally, he crashes his mouth to yours in a fevered kiss, your bodies heating up together as he forces you back, past your cage, until your butt hits the edge of his bed, and then he forces you back on it with his tongue between your teeth.
You yip in surprise when he Decays your skirt right off you, but he makes it good by wrapping a hand around your short, slim, weeping cock. You yowl like the bitch in heat that you are as he masturbates for you, he purrs deeply when you cum and cover his bed in slick. He rips his shirt off, an unnecessary display in your opinion then rips his pants almost completely in two to pull his much larger, much thicker, much prettier cock out, you drool a little as you stare at it.
"Like what you see, pretty boy?" Shigaraki purrs to you, you mewl as he lets it rest against your stomach as he adjusts you. He easily throws your knees over his elbows, grabbing your hips and teasing you by pressing his balls against your fluttering opening. You mewl and beg for him to touch you, take you, claim you! He presses two fingers deep into you, your walls already tight around even that little as he presses deep, then strokes back gently.
"That's an Omega, that's my Omega. Preen, my prince, preen for me." You obey without question, puffing up happily and preening beautifully as he begins to scissor you. You mewl and grind against his hand, your own hands timidly tangling in his hair. "Play with me baby - cause you won't walk right for a month when I'm through with you!"
You happily rake your nails against his shoulders and upper back, he taunts you and uses your own cum to add to your sloppy cunt. He manages to get a third finger in to scissor you before you come again, your weak biological excuse for semen splattering up his chest and making him prouder of what he's doing to you as you pull his hair and keen for his 'pretty cock, such a pretty cock.'
He growls lowly when you try to touch it though, you keen to him for it, and he relents for you to stroke it as he continues to slowly scissor you open. You happily jack him off, and he stills gently as you do, watching your horny delight as he twitches in your hands, then explodes with semen, his splatter reaches all the way up by your face, and you keen more and lick at it all.
"Enough play." He growls, taking his still hard cock and lining himself up. Just the head makes you preen and keen and plead for 'harder, faster, please Alpha, faster' but he knows that if he does this wrong, you'll get badly hurt.
That doesn't help his level of excitement.
You are small. The fact that he could lift you so easily says that much, but your walls were so tight, he sees stars and meets your cervix only halfway down his length. You mewl more, claw him some more, making pretty marks on his pretty skin, then you feel him start to stretch your cervix. Panic and arousal mix and clash, and you pull yourself against him tightly.
"Alpha! Alpha, please! I don't want to get damaged and hurt our pups!" He purrs at your worries, easily grinding against you just right to make you gasp and pant and sing him more praises as he slowly, achingly slowly, stretches your cervix to fit around the head of his cock.
Once he bottoms out, you're starry-eyed at the feeling of his cock head snug against your prostate, and you orgasm the minute he moves.
He doesn't stop for you though and pull out until his head is snug up against your cervix again, and this time he simply slams through it, causing you to scream in surprise and need.
Buildings could collapse because of his purr, and he ruts into you at a downright barbaric pace, easily bruising your prostate and cervix at the same time, his balls loudly slapping up against your slick-covered arse. You try to wrap your arms around his neck, cling to him, but he grabs both of your wrists in one hand and holds them up by the headboard as his other hand wraps around your throat gently.
"Omega, behave. Or no knotting tonight." He growls out, his voice velvety and warm from his heavy purr, but you burst into tears at the threat, and he squeezes your throat deliciously. You orgasm again, just from that, and he purrs so hard the walls rattle around your both.
Your slick pools and pools around you both, your watery cum not potent enough to impregnate anything, and mostly just existing to help slick you up more. It does help now, as Shigaraki's knot starts to grow, you plead and keen for him to knot you, you'll be good for him. Please knot you, you'll be such a good Omega for him!
He chuckles darkly, continuing to slam against you like a jackhammer, your cervix screaming in pain and your prostate numb.
He makes you orgasm nearly seven more times before slowing down enough for his knot to lock you both into place. He settles over you like a blanket, his hand still gently wrapped around your throat. He squeezes sometimes, just to feel your walls get even tighter around his knotted cock, you mewl cutely at him.
"A-Alpha," You have the airy fucked-out tone of a very pleased Omega as he turns to look at you, you squeeze him a little, obviously turned on by his eyes alone. "W-Was I a good Omega for you? Do I get more knots tonight?"
"Of course, silly thing, I promised I would make you struggle to walk for the next month, didn't I?" He also has the fucked-out tones of his gender, but it makes his voice deeper, his tone softer, and his chest sound barrelled.
It makes you squeeze him hard enough he cums. Even though his knot was already set, he cums hard, nuzzling into your neck and releasing your wrists in order to hold your hips up. Your eyes roll into the back of your head and you keen the loudest keen yet, your warm, moist walls milking him for all he's worth.
He chuckles and squeezes your throat again playfully, your beautiful keen cuts off slightly as he does so, but he shifts his hips and you see stars again as his head settles on your drowning prostate. He grinds down on you, his knot pressing painfully tight against your entrance as he makes you mewl and keen and whine and preen all over again.
Soon, your throat is bruised so badly you can see his individual fingerprints, and his knot has deflated enough that you're feeling frisky.
"Alpha~" You sing in his ear, he opens one eye and smiles as you press against him, he rolls onto his back, and lets you bounce on his dick for a while, until he feels his knot starting to form again. "Play with me~"
"Frisky, huh?" He mutters, but flips you back onto your back, nuzzling into your neck and snapping his hips against yours, you moan loudly. He smiles and gently starts to lick your expanded scent gland, your taste of honey, milk, and caramel making him melt and cum again. You wrap your legs around his hips and lock your ankles together at the small of his back, he lifts your hips slightly, his knot slowly blowing again as he fucks his cum into you roughly. "Mmh!~ Omega, you taste like candy."
"My nipples taste even better~" You tease him, arching your back beautifully, he lets out a possessive growl and fondles one as he lowers his head a little. Your eyes roll back again as he sucks powerfully on the one he isn't fondling. He happily sucks on you as if you're already lactating, bruising your supple flesh with his mouth, and lathering his saliva onto it with his tongue. You can't help but orgasm a few more times, his snapping hips and sucking lips making your eyes roll into the back of your head as he cums again.
"Alpha! Alpha, you said more knots later!" You plead as he slows down, he slams back against your prostate like a battering ram, making you arch so far so fast, he has to hold you to him as he cums yet again and blows his knot for the second time. He lets out small, possessive growls as your vagina milks him for all he has. He admires his purple-hued work on your nipples, gently fondling the one he abused so severely as he licks and kisses and sucks his way back up to your scent gland. You babble incoherently at him, saying he's a good Alpha and you can be a good Omega if he wants you to, but you aren't afraid of spankies if he wants you to be a brat. He lathers some more attention and spit on your scent gland, grinding against you and holding you in the air with four fingers against each ass cheek.
"Little Omega, stay quiet a moment." He requests, his voice purring again and making you submit even more to him, he tests his teeth against your skin, his canines extending as he does so. He slowly feels over your scent gland as you lay in a submission, fucked-out, content pile as he selects a prime location to mark you.
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