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Slut at Heart [KuroKen One Shot Collection]

Summary:

10 different one shots where Kuroo fucks Kenma.

Notes:

hiii i had all these krkn prompts sitting in my notes and ik i'll never have time to write them into longer fics so i gave myself a challenge and polled twitter on ideas to write!

my challenge was to set a 1k min - 5k max wc and write 10 one shots before valentines. i started on jan 27 and finished three days before vday 💪 every fic is kuroken only too! which if you've read literally anything else i write, is a challenge in and of itself lmao.

there will be a new fic every night (pacific time) 🐈

reoccurring side ships - snos, skts, hinayachi.

(See the end of the work for more notes.)

Chapter 1: king kenma

Chapter Text

“How’s your search for an alpha going?”

“Horribly.”

Shouyou cackled beside Kenma as they stood together in one of the corners of the bustling ballroom, both of the kings were in Seijoh for one last night before returning to their respective kingdoms. Most of the week had been talk of trade deals, border disputes, various political bullshit that Kenma sat through and Tooru giving his daughter away in a marriage to one of the lords around here.

The clock was ticking for Kenma, his thirtieth birthday would be in three months and people had expectations of the omega as if he could quit everything to raise a pup he never wanted. Well, maybe that’s too negative, Kenma likes pups plenty and doesn’t mind being the uncle who spoils Taketora’s children... but Kenma is the king of Nekoma.

He has a literal country's worth of problems on his shoulders, he can’t just sit out for the sake of motherhood and fulfilling those old wrenches desires. He barely had the time or patience to deal with finding an appropriate mate to marry because he couldn’t just trust any alpha to take up the throne beside him.

“Daichi is still very much available~”

Ah, the captain of the Karasuno royal guard, a solid match.

“Last resort,” Kenma murmured before sipping his glass of wine, “I’ve been staring at the offers of Osamu and Meian too... I figure I just need an alpha to impregnate me during my next heat and they’ll get off my ass.”

“Oh, Meian,” Shouyou perked up, “you’re re-considering him?”

“He isn’t married, he doesn’t have any loyal ties to any of these kingdoms, and he has no interest in ruling with me,” Kenma listed out as his golden eyes searched the room to find the wealthy merchant, “I thought I’d pay him in a chest of gold and some land to keep quiet about it.”

“Mmm... I guess that’s fair,” Shouyou replied as Kenma felt like he had more to say, “he’s a decent alpha, good genes, great reputation...”

“But?”

“But he’s not someone you even like! Or Love! Or want to have sex with!” Shouyou blurted out, “it’ll be all business and weirdly clinical and you deserve better than that, Kenma.”

“Not all of us were lucky enough to be born with a soulmate, Shou,” Kenma kindly reminded the beta who slightly frowned, “at my age I’m better off with a quick arrangement just to get this over with and have an heir everyone can be obsessed over.”

“You say that like one foot is in the grave! You technically still have like, twenty, thirty years before you can’t have pups anymore. What are they gonna do, overthrow you?”

“You’ve seen how small I am, it won’t take much manpower.”

Shouyou giggled at that and caused Kenma to laugh as well, attending this wedding did have many people asking Kenma when he’d find an alpha and it was grating. Tooru was oddly more protective than Kenma expected him to be, especially when the nobles were hounding him and Tooru yanked him away to safety.

He was also blessed with a soulmate, but promised Kenma that when push came to shove, he’d always have the little king’s back no matter what. And Shouyou was right, thirty was just some arbitrary age and Kenma wasn’t going to be scared into some loveless marriage for the sake of tradition.

But...

“I think there might be someone.”

“Ehhh?!”

“Quiet,” Kenma pinched Shouyou’s cheek, “I didn’t want to say anything just in case I was wrong or simply losing my mental facilities... but you know how alphas and omegas have a voice?”

Shouyou nodded, as a beta he’d never experienced that himself, but his omega wife Hitoka had told him what it’s like.

“I’ve never heard mine until recently.”

“Who?” Shouyou was leaning closer into Kenma’s personal space, but the omega didn’t mind it after knowing the crow since they were children.

“Well... Meian defeated and captured a pirate crew, then delivered them to my palace for the bounty... I may have suggested to Meian then about the pup thing,” Kenma said, “but I went to the dungeons to go take a look at the pirates who were wreaking havoc in my waters and well... you know Captain Kuroneko?”

“Meian captured him?!” Shouyou managed to at least keep his voice from shouting at an obscene volume, “huh, no wonder I haven’t received any reports about them stealing from ships lately.”

“It was a long and drawn out process I’m told, Meian managed to trap him, but anyway - I go to his cell and something starts yelling in my head about a strong alpha and what do you know, that bastard was smirking at me,” Kenma clicked his tongue, “we talked... a little, I left and my omega still wouldn’t shut up about wanting to see him.”

“Interesting, so very interesting!” There was a smile on Shouyou’s face that Kenma immediately disliked, “Kei tells me that Kuroneko was born in Nekoma, but his entire family was peasants and there isn’t much else on them.”

“I’ve heard,” Kenma looks at the remainder of the wine in his glass and finishes it off.

“So what if by some chance he’s your-”

“A filthy no good piece of shit pirate is not my soulmate, Shou.”

“But he can be the father of your pup.”

“I’m rescinding every possible deal I’ve made with you this week,” Kenma turns to walk away as Shouyou is fast to grab his haori.

“Kenmaaaa! Just hear me out, I’ve known you for this long and you’ve been introduced to a million alphas and your omega has been silent until now,” Shouyou said as Kenma still refused to look at him, “yes he’s a pirate and has been a menace for like, the past decade, but this has to mean something, right? What if you don’t get to hear your omega again?”

“Why can’t you just be like Tora and tell me to behead him?”

“Because I care about your long term happiness! And I guess you don’t have to marry the guy, but something like having a pup is special... you should enjoy it,” Shouyou said, “plus if you really wanted to, you would’ve killed him by now. You’re thinking of him.”

“Fuck off,” Kenma groaned as Shouyou vibrated with joy, “he’s not... the worst person, I suppose. He’s nice to talk to.”

“Oh? How often have you been having late night candlelight discussions?”

“Meian brought him in May so... three months?”

“You’ve been flirting with him for three months!”

“I have not!”

“Yes you have-”

Just by Kenma’s luck he spotted Keiji coming their direction with Rintaro and glared at Shouyou to shut up. Kenma was never more relieved that he’d be leaving in the morning so he wouldn’t have to suffer with Shouyou’s dozens of questions.

 

~

 

Being back in his own palace was nice, cozy, and a lovely reminder that his heat would be starting within the next two weeks. Shouyou badgered him for more details over a breakfast they shared together, but Kenma quite purposefully left out that his pheromones had been acting up.

His heat came early just a month after they detained the pirate and his omega was screaming for the pirate, none of the concubines were good enough. And the chances of him biting Meian (not in a sexy way) were off the charts if his omega took over. 

He was feeling the pre-heat symptoms and from his observation of Tora’s relationship, whenever they were trying for another pup his wife went into heat multiple times. His body wanted the pirate’s knot and Kenma wanted to throw himself off of a cliff, unfortunately he could only pick one of these options.

He knew that telling Shouyou was a good choice overall, his best friend was very excitable and a tad impulsive, but he always spoke in Kenma’s best interest. It’s why he hasn’t acted on any of these insane urges that have invaded his body and mind, Shouyou was the one person who would tell it to him straight.

And Meian was not it.

God, how has Kenma lowered himself to this position?

Kenma busies himself with the plate of apple tarts on the small table that he’s sitting at as he overlooks the courtyard from his balcony. The weather was warm, a few clouds in the sky, and plenty of cats wandering about the palace grounds as staff went about their duties.

The king doesn’t stir when the double doors to his chambers are opened up and he hears the footsteps of his knight, Inuoka and the clanking of chains. 

“Damn it’s nice to have some fresh air for once, and with a gorgeous view.”

“Leave us, Inuoka.”

“I’ll be posted right by your door, your highness.”

The pirate walked himself onto the balcony and took up the other chair just across from Kenma, iron handcuffs were on his wrists and ankles. Kenma glanced over to see that he did clean up well enough without all that dirt, grime, and soiled clothing, his hair was unable to be tamed it seemed.

“They got me cleaned, shaved, and dressed up like a proper bitch, are you going to fuck me now or keep depriving me?”

“Why are you always so vulgar?”

“Because you scrunch your nose in that cute way like you fucking hate me, but ya keep coming back like an addict,” The pirate smirked, “so I’m assuming your princess ass is too tired from all that traveling and you’re dragging me up here with the elite.”

Kenma is indeed, wrinkling his nose and he hates that this criminal is right, “... I have a proposal for you, Kuroo Tetsurou.”

“Eh, who ratted out my name to you? I would’ve told you if you asked, maybe while I was inside of you.” That insufferable grin is painted on those stupid lips.

Alpha, alpha, alpha!

“My heat is coming up soon and I need you to accompany me, afterwards I’ll let your crew go as long as you stay out of my waters,” Kenma disregarded Kuroo’s lewd comment in favor of keeping this meeting short, “I don’t care what you choose to do with your time, just... stop causing me trouble.”

“I know that I’m a handsome alpha and all, I’ve fucked whores in every kingdom ‘round here, but why me, princess? Surely you can pick any of these snobby fuckers to warm your bed.”

“Do you want freedom or the noose for your crew?” Kenma calmly replied as he picked up another tart and locked eyes with Kuroo, “I’ve been holding off on your collective punishments long enough as I’ve had other things to tend to.”

A lie, but the pirate didn’t need to know.

Kuroo pursed his lips as he looked over at the little king, relatively unbothered and enjoying his dessert, “... will I get my ship back?”

“All of your stolen loot has been in process of being returned to the rightful owners, as for the ship itself, you’ll have to ask Meian what he’s done with it.”

“That asshole probably scrapped it or turned it into another fuckin’ whorehouse,” Kuroo clicked his tongue, “I’m not opposed to knotting you for a week straight, I just don’t understand why you’re picking me. You don’t care about the lives of my friends, none of us matter to someone like you.”

“Just accept it for what it is, Kuro, a ticket to a fresh start, maybe you’ll make better decisions once you’re free.”

“I won’t.”

Kenma rolled his eyes as his omega preened from having alpha so close to them, “can I trust you to behave just enough so that you won’t run off?”

“I’m not going anywhere while you have my friends locked up, kitten,” Kuroo raised his shackled hands to snatch the last tart and chomped into half of it, “speaking of, I think they deserve better lodgings too.”

“This isn’t a negotiation...”

“You want me in your bed, yeah? I can tell you to fuck off and we’re all fine getting hung tomorrow,” Kuroo said, “s’all we’ve been waiting for anyway, so why can’t I get a little more out of this deal?”

Provide for alpha... impress alpha...

“I don’t know how someone hasn’t put a bullet in you yet,” Kenma stands from the table, “make your ridiculous requests to my assistant, but do not think about leaving this palace.”

“They have, wanna see the scars?” Kenma turned to leave just as Kuroo lifts up his shirt, “which one is your assistant?! They all look like they got sticks up their asses.”

“Figure it out, Kuro.” That’s for eating my last apple tart.

 

~

 

Everything hurts.

From the cramps ravaging his groin to the throbbing ache between his thighs to how sweaty his body is and all the slick pouring from his hole onto the blankets. It was enough to have him vomiting at one point before he demanded an attendant bring him Kuroo right fucking now.

Need alpha, where’s alpha, I want alpha .

His fingers push into his sloppy cunt as he raises his hips up and tries to relieve the pain rolling through his small body, it’s torture, it’s worse than his last heat. His flush cheek is pressed on the pillow that faintly smells of Shouyou and his omega hates it, the nausea threatens to bubble up once more. 

He just needs to get off, just once and maybe it won’t hurt so badly, fuck . It barely feels like his fingers are doing anything, he could summon someone to use a toy on him, but god he doesn’t want to move from his nest either. Why was he born an omega, why couldn’t he be like Shouyou, a beta who doesn’t have to deal with any of this constant bullshit .

“Hey, hey baby I got’cha, alpha’s here.”

Kenma whined from the smell of calming pheromones flooding his space, his omega was throwing a damn tantrum in his head. Warm hands touched his hips and Kenma instinctively pushed his ass up higher, he needed a cock to stuff him full now. 

“Ah, you got it bad princess, don’t worry I’ll make sure you feel real good.”

Kenma didn’t care what he did as long as there was a- oh , well... a tongue works too. The ailing king dropped his hands onto the sheets and felt those big hands squeezing his ass cheeks. A wet tongue pushed into his pussy and Kuroo kept pumping out heavy pheromones to relax his omega, coaxing him further into that foreign space Kenma never experienced before.

Alpha was here to take care of him, alpha was here to give him a pup.

Kenma’s hips were kept still by Kuroo’s strong hands as his pussy was eaten out by the vulgar captain and Kenma was melting. The omega hadn’t felt so... floaty with any other alpha he forced himself to go through his heats with. Kuroo had to be different in every single conceivable way, no wonder he was so easy to hate. To despise. To wish that Kenma never met him and he wouldn’t be going through this.

But oh god, this alpha knew how to treat a pussy, his lips on Kenma’s clit had the omega moaning for him and he barely knew what was coming out of his mouth. And when fingers curled around his omegan cock to gently tug on it? Yeah, he was done for.

“Tetsurou, Tetsurou!

“Sssh, it’s okay, I’m not going anywhere,” Kuroo rubbed Kenma’s lower back, “you guys can fuck off, I’m not going to kill your king.”

Kenma didn’t even know there were other people in here, he was too immersed in alpha and how every touch on his skin set him alight. The taste of his thick scent had omega drooling from his mouth and hole, he was high on his alpha and... everything about him.

“Good omega, you smell beautiful now,” Kuroo kissed his inner thighs and licked up the slick there, then moved up to kiss along the fat of his ass and lower back. Far more soft than Kenma ever imagined this brute to be, but there was always an odd fondness in his eyes that Kenma chose to ignore.

Kuroo would be chained up in his cell, waiting on the little king to show and he often failed to hide his excitement. Kenma would never admit to flirting with him for all this time, but Kuroo was someone new... someone outside of what Kenma usually socialized with.

“One more for alpha, okay?” Kuroo’s lips were near his ears now as long fingers thrusted in his cunt, “I know you’re hurting, but need your body to relax and release all that stress for me, love.”

“Alpha...” Kenma nuzzled against the pillow and just appreciated his comforting scent and the weight on top of him, felt so protective. More kisses landed on his neck and shoulders, along with quiet words of praise that had his omega singing.

“You’re the prettiest omega I’ve ever laid eyes on... if I saw you in the street I’d definitely chase you down and make you mine,” Kuroo mused, “or at least get a single, unforgettable night with you.”

“Only one? Alpha wouldn’t keep me?”

“No, no I would totally want you on my arm, shit, I’d take you on my ship and we can sail wherever you wanted, sweet thing,” Kuroo smoothly said just as Kenma’s scent threatened to turn sour, “Don’t know if you’d be okay with me taking you away from here, though.”

“... too much work for me to do, alpha stay.”

“Yes, yes alpha will stay here with the cutest omega bitch in the kingdom.”

Kenma purred at that as slick gushed from his hole and drenched Kuroo’s fingers, he could hear the low growl from the alpha. Kenma could lay here for days, weeks, as alpha fingered him or fucked him open with his filthy tongue... so much better than having to deal with the idiots on the council.

“Pretty baby...” Kuroo whispered before withdrawing his fingers and instead replacing them with his cock. His clean hand scruffed the back of Kenma’s neck and encouraged his ongoing submission, there was zero fight from his omega as Kuroo fucked into him with powerful thrusts.

Being held down and treated like an omega with one purpose, was this all Kenma ever wanted in life?

“You’re not a king when I have you like this, Kenma,” His name rolling off of Kuroo’s tongue had a warm shiver running up his spine, “you’re just like every other omega waiting to be bred by my cock, I’m the one in charge. I’m the one deciding on if I’ll get’cha knocked up.”

“Please, please, I want your pup, I wanna be pupped up by you alpha!” 

Kenma was just babbling now, trying to say anything to convince alpha that he was good enough to be impregnated by him. A sudden, sharp smack on his ass had him yelping as Kuroo snickered above him.

“I bet you’ve never begged for a fucking thingin your life, spoiled little cunt.”

Another spank and Kenma was rolling his hips back.

“Sitting here so high up in your fancy fucking castle, looking down on the rest of us...” Kuroo punctuated that with more spanks, “and look at you now, crying for my knot.”

“Knot, knot, knot I want it... alpha.”

“God, what a fine treat you’ve blessed me with.”

Kuroo was ruthless, pushing Kenma face into the pillows as he fucked into him at a punshing, brutal pace. Kenma could take it all as long as he was knotted, he could feel that bulge expanding on his walls as the smell of arousal dominated the air.

Kuroo didn’t hold back like the concubines, he wasn’t afraid to say what was on his mind, didn’t mind slapping Kenma’s ass just to see it glow red. It was obvious in the way Kuroo looked at him when Meian dragged him into the throne room, how sly hazel eyes woke something up in Kenma.

Did alpha feel it too...

“Fuck, Kenma... so good .” 

His knot popped as Kuroo slammed in and Kenma felt the overwhelming warmth of his seed pooling into him. He wanted it to take, wanted to be swelling with Kuroo’s pup...

“Feel better, baby?”

“Much...”

Kuroo rearranged them so they were laying on their side and looped an arm around Kenma’s chest, “good, I’ll be asking for more gold since you’re gonna exhaust me by the end of this.”

“Is your stamina that shit?”

“No,” Kuroo rocks up in Kenma to get a cute squeak from him, “but you’ve never been proper fucked on your heat I bet, your body is going to be craving it endlessly.”

“I don’t want to think about that,” Kenma buried his face in his hands.

“Don’t gotta think at all, just lay there and let me fuck you, doll.”

Yeah.

Yeah, it was genuinely that easy when Kuroo told everyone else to fuck off and Kenma belonged to him for the entire week. Thoughts of the kingdom slipped from his mind every time Kuroo knotted and flooded him with semen. He was fucking amazing at sex and it wasn’t fair in the slightest.

By the last day, Kenma was functional, sore, but functional.

And that’s when he noticed a black mark on Kuroo’s back, near his tailbone. Kenma blinked his drowsiness away as he looked closer and that was a cat shaped mark, it was sitting down with its tail curled and licking its paw.

“Is that a soulmate mark?”

The question took Kuroo all the way off guard as he jumped off the bed and suddenly for once didn’t have anything to say.

“Answer me, Kuro.”

“Well, I guess technically it can be perhaps called one.”

“How long have you had it...?”

“Is that really an important question? I mean-”

Alpha, alpha mate!

Kenma looked from the distressed alpha to the full body mirror and stomped his way over as Kuroo chased after him, “wait, it’s probably nothing!”

Kenma stared over his shoulder to see that yes, he had a matching mark. In the same spot. That Kuroo would’ve definitely seen. 

“Kuro.”

“Let me explain.”

“You have one minute.”

“I had no idea! It was when Meian arrested us and brought us to you... that my alpha started grumbling about an omega... then I asked Yakkun to look at my back and he confirmed it,” Kuroo sounded sincere enough, “but I didn’t know it was you until I saw you... naked.”

“I... see.”

Kenma went off to retrieve a robe as Kuroo quietly put his clothing on, the two then sat at the foot of the messy bed in silence. Kenma probably should’ve seen it coming when his omega began to speak, but the pirate was just so irritating on every level.

“The offer is still up, you can leave with your crew.”

“Right...”

Kenma expects the pirate to rush out as soon as possible, but he smells that soft scent wrap around him, along with Kuroo scooting closer. 

“I’m not fond of staying on land, but I would like to come back, preferably without the chains.” Kuroo brings an arm around Kenma’s waist and the omega leans into him, “maybe we can write letters?”

“... sure, it can’t possibly get any worse than this.”

“You love me, don’t lie.”

Kenma now decides he needs to back away, but the alpha just pushes him backwards and climbs on top of him, then... leans down, his lips ghosting over Kenma’s. Kenma threads his fingers in messy hair and pulls him down into their first kiss.

“When exactly am I getting kicked out?”

“Whenever you leave my bedroom.”

“I’ll stay another week then!”