Katsuki was working on making dinner, getting vegetables chopped up, and put into a bowl for the time being.
But Eijirou had other ideas.
It had been a long week, Eijirou getting stuck with the night shift twice and Katsuki with the morning shift.
They argued more—about stupid things only sleep-deprived versions of themselves could. Like how Katsuki got stuck picking up the shoes in the genkan or how Eijirou got stuck with the laundry for the last month when they agreed to switch it weekly.
The stress of life felt too much and Eijirou was done.
So after work, he went to the pet store before he could talk himself out of it.
He grabbed two things.
They talked about it before, once, and Eijirou could not get it out of his head. Sure, Eijirou loved being dominant. Putting Katsuki in his place always felt rather powerful to have the number one hero calling himself a cumslut. It was definitely something Eijirou enjoyed.
But he couldn't help but think it would be nice to change something.
Try something different.
Eijirou wanted to feel owned and he knew his husband would take care of him. So, Eijirou walked into the pet store after work. And felt like an idiot while grabbing the bright red leash and collar despite everything. But if it meant things would work out then it was well worth it.
The lie of telling the cashier he was getting a dog or rather his husband was, technically it was only a half lie. Kind of.
When he got home, Katsuki was in the kitchen. Busy making them dinner and meal prepping for the next day since he had the extra time.
Eijirou almost moaned at the smell alone, herbs, garlic, and the roast Katsuki had in the oven made for their entire apartment to smell like a Sunday dinner or something just as heavenly. Eijirou nearly forgot why he was so nervous to go home in the first place.
He had to remind himself he needed to focus.
Katsuki didn't look up when he noticed Eijirou walk into the kitchen. "Evening, Shitty Hair."
Years of the same name that Eijirou had grown to like. He knew Katsuki liked his hair but the nickname never disappeared over the years apparently.
Eijirou didn't answer him.
He was nervous.
Tired.
And a bit moody from being up so long without a proper rest. So he waited, Eijirou had set the leash on the counter and waited for Katsuki to turn around.
Katsuki finished cutting the vegetables he was chopping up before he looked over to his suddenly talkative husband turning silent on him.
"We are not getting a dog while living in the apartment you knew that when you signed the lease—"
Eijirou cut him off. "It's not for that."
"Vague as ever," Katsuki mixed what was on the stove before turning to him.
This time with his full attention.
Eijirou's breath hitched.
"Are you going to stand there wreaking of anxiety or tell me what you want to?"
"First one," Eijirou nodded.
The first one sounded like a nice plan.
Katsuki rolled his eyes, stepping over to him and pulling him in by his hero belt. "Do I have to guess?"
Eijirou talked to his husband about clear communication, but now he was doing exactly what he asked Katsuki not to do. He was too scared of his husband—would what?
Say no?
Think it was weird?
He knew Katsuki would try it. He knew that with the things Katsuki asked to try with him that they had a shame-free mindset when it came to sex, as long as it didn't cross one of their hard limits then they were down to try whatever as long as anything new was talked about first.
So he took a breath.
"I want to be the dog," Eijirou blurted out.
Katsuki raised a brow. "You want me to treat you like a dog?"
Eijirou nodded. "I want you to be my owner and—uh—I thought you would use me…"
Katsuki smirked, thinking about it instantly. "And you were nervous about that?"
"We never done anything like pet play before other than those cat ears you got for Halloween—"
Katsuki cut him off with a laugh. "Eijirou you've told me my mouth looked good for sucking dick—in second year—when we weren't even dating."
Eijirou blushed.
It was an internal thought and Denki was talking to him about what would make a perfect mouth for a blow job—which Katsuki fit the criteria so well he just kinda blurted it out when the blond was eating a popsicle.
And a month later he realized he was right and that Katsuki's mouth was heaven.
But that wasn't the point.
"I am just saying, I want to drop. It seems to help when you have a stressful week and—"
Katsuki took the leash and collar. "Okay."
"Okay?" Eijirou asked.
Was it really that easy?!
"You know the gauntlets I have in the safe in the office?" Katsuki asked.
Confused, Eijirou nodded. "Uh, yeah?"
"Use them on me if I ever say 'no' to fucking you."
Eijirou rolled his eyes. "Dramatic."
"Always," Katsuki winked.
The blond looked him up and down. Eijirou knew he liked when he wore his hero costume home, role-playing as Red Riot's number one fan more times than Eijirou could count—and he was not about to complain about having the blond's attention.
"Safeword is the same," Katsuki started. "You still topping or do you want to bottom tonight?"
Eijirou thought about it, he only bottomed a few times when the mood hit. Katsuki had several custom strap-ons that had Eijirou seeing stars but tonight he wasn't feeling up to it. Then again he just really wanted to drop into subspace; he didn't really care how he got there.
"I'm good with topping."
Katsuki nodded. "Safe word?"
Despite them never changing it they always checked in on what their safe word was. Just an added reminder that it can and should be used if at any point either of them were uncomfortable about something. Though it was usually Eijirou reminding it to Katsuki.
"Kaminari," Eijirou answered.
Katsuki nodded.
They picked that safe word after getting caught—or rather being walked in on in the dorms. Eijirou was yelling for Kaminari to get out and Katsuki—who was riding him at the time—stopped his movements, the death glare he sent to Kaminari had the electric blond screaming in true unmatched terror—to the point Iida thought there was a villain attack and came rushing to their dorm.
Explaining that everything was fine, and at the very least Iida missed the entire fact Eijirou and Katsuki were only half dressed—it still got them stuck in detention and a not so fun call to their parents. Eijirou did not want to think about the sex talk he got when he went home for the weekend but at least he was over that by now.
"Good, undress to your boxers and get on all fours," Katsuki ordered.
Katsuki took on the role immediately.
And while Eijirou was still a bit nervous he did what he was told, throwing his clothes to the floor as Katsuki waited in the hall for him.
"Come here."
Eijirou crawled to Katsuki, the blond fitting the collar to him perfectly. If this worked out Eijirou would have to get a pet play-friendly one made but for now, this would work.
Katsuki latched onto the leash and pulled Eijirou to their room. He felt kinda stupid at first but when Katsuki ordered him and guided him into their room Eijirou felt different.
Eijirou could be a good boy, a great boy even.
Katsuki had him by the leach, guiding him up onto their bed, smirking at how easily Eijirou complied.
"Sit," Katsuki ordered.
Eijirou didn't hesitate as he sat on the edge of the bed watching as his husband looked him up and down.
"Stay."
Eijirou did as he was told. Watching his husband get undressed, throwing his clothes to the floor to reveal Eijirou's favorite sights. A naked Kirishima Katsuki.
He smirked knowing just how much Eijirou liked the view. Katsuki had no problem making a show of it, dragging the waistband of his boxers down slowly, watching as Eijirou leaned closer ever so slightly.
"Can a mutt like you be good?"
Katsuki didn't let him answer before he walked closer, boxers thrown to the floor as he pushed Eijirou back on the bed. He didn't waste any time in tugging Eijirou's boxers off and leaning down, licking up his shaft.
Eijirou shivered at the feeling.
"You gonna let your owner fuck you, use your dick until he cums?" Katsuki asked, crawling up onto their bed and straddling his waist. "A little mutt like you, that's all you're good for."
Eijirou moaned at that.
His head felt a bit muffled, like Katsuki's voice was all he could focus on. Each word, each demand took him closer to dropping a little more. Forgetting about how shitty his day was as he looked into red eyes, as Katsuki ground down on his lap, as the blond leaned forward balancing himself on top of Eijirou to stretch himself.
Eijirou's focus was lost.
Katsuki was all he heard, the soft hums as he stretched himself, the wet sounds he made as he added another finger to his pussy.
"At least you're big, perfect length too," Katsuki hummed.
When the blond pulled his fingers out of his pussy he didn't hesitate to press them to Eijirou's mouth. The good puppy sucked on them just as he was silently asked. The familiar tangy taste made him moan. He loved how his owner tasted.
"Good dog," Katsuki hummed.
Fuck.
Eijirou liked the sound of that.
He was too distracted to notice Katsuki situate himself on Eijirou's lap a bit differently this time, at least until the blond sank down on him. Lining his dick up and slowly taking what he wanted from his mutt.
The red leash loosely wrapped around his hand as he began moving, grinding his hips down and getting used to the full feeling before he began to ride him for real. Lifting himself up and dropping right back down, setting the perfect pace for the both of them.
Muscular thighs flexing with each movement, Eijirou could have drooled at the sight. Seeing his husband ride him for his own pleasure felt like a totally different high he felt when having sex with the blond.
The collar around his neck only adding to the reminder.
Katsuki was in control here.
Katsuki was his owner and Eijirou knew he would take care of him.
Eijirou didn't even think about touching Katsuki, he was just meant to lay there. Katsuki took care of the rest, bouncing on his dick, his warm pussy clenching around him and making Eijirou a total mess.
"Look at me, mutt," Katsuki demanded.
Eijirou didn't even notice his eyes were closed. Katsuki slowed his pace, fucking himself slowly, grinding his hips down to where he needed.
"You wanna mark me up?"
Eijirou looked up into red eyes he had gotten lost in so many fucking times.
He nodded.
"Bark," Katsuki's tone was stern.
Eijirou didn't think about it, he barked.
"Good puppy," Katsuki cooed.
The blond leaned down, his body leaning over Eijirou as his neck was the perfect level for the redhead. He could smell the aftershave Katsuki used from his shower when he got home, fresh and clean, and also a mix of Katsuki's own sweet scent.
"I want you to use those sharp teeth to mark my neck as I cum around your cock."
Eijirou's breath hitched.
"If you do good I'll let you have a treat~" Katsuki smirked.
He leaned down and licked up Eijirou's neck, not seeming to mind. Eijirou was sweaty and had yet to shower after coming home from work. Katsuki didn't care. He only pulled back enough to give him access to his own neck.
"Now, be a good dog and do what the fuck I told you to," Katsuki ordered him.
He kept his pace as he fucked himself on Eijirou, using his dick as if it were nothing more than a toy for him to get off on. To fuck himself and leave on the bed after he came.
Eijirou leaned in and licked up Katsuki's neck first, tasting how sweet his owner was. Savoring how lucky he was to be used like this. Eijirou bit down, lightly sinking his sharp teeth into Katsuki's neck.
He licked over the mark as he pulled away a little.
But Katsuki was not going to have it. "Harder."
He pushed Eijirou down, and who was he to question it? Eijirou bit down at the base of his neck, biting part of his shoulder. Letting his teeth break the skin as he bit down harder this time.
"Ahh—good dog—good fuckin' dog!" Katsuki moaned as he came.
Riding his orgasm out before telling Eijirou what to do.
"Let go."
Eijirou licked over the mark one last time, the taste of copper on his tongue.
"Oh fuck," Katsuki moved off of him.
Eijirou whined, his dick still hard. He knew Katsuki would take care of him. All he had to do was be good.
"I'll let you hump me," Katsuki trailed a finger along his dick. "If you clean up after yourself when you're done."
Eijirou barked, totally gone at this point. His head felt fuzzy and fuck he could only think about how good Katsuki would taste when he came. He loved being able to eat him out, his thighs closing around his head.
Fuck.
"I'll take that as a yes," Katsuki chuckled.
He pushed Eijirou over a little and took his place on the bed. Spreading his legs for Eijirou to get the hint.
"Hurry up mutt before I change my mind," Katsuki muttered.
Eijirou scrambled off the bed. Katsuki took hold of his leash, pulling him back this time. Not too hard since it wasn't really made for harsh yanks but it was enough to pull Eijirou forward.
"Cum in me first," Katsuki insisted.
He wasted no time in thrusting into Katsuki, fucking into his pussy for his own relief. He felt so fucking good, Eijirou moaned at the feeling. He felt dizzy, his head all clouded by everything Katsuki.
"Show me how you treat your owner," Katsuki gasped.
Eijirou happily rutted into him, using him now that Katsuki let him. Eijirou felt the weight of his day gone. The only task he had at the moment was to fill his owner.
All he had to do was cum.
Give him a pup—
And fuck.
Eijirou didn't have time to think about the kink he just fucking unlocked, Katsuki was pulling on his leash and Eijirou was so fucking gone already. He chased after the feeling, letting all his worries go as he fucked into his husband.
"Come on Ei, be a good mutt~"
And Eijirou felt like he was going to blackout as he came. Stilling deep inside his owner and filling him like he was told to.
Only taking in a breath when he was done, gasping in air, and falling onto the blond who grunted but didn't push him off and to the stop beside him.
Eijirou licked his neck one more time, totally out of it while he felt his body relax. He was still blissed out and the fuzzy feeling in his limbs was too nice to rush away.
Katsuki rubbed his back for a while he as Eijirou leaned over him a bit more, pressing soft kisses to his neck, slowly started to come back from his sub drop.
And wow.
He felt so relaxed, tired still but no longer at his breaking point. He felt refreshed. His stress and overwhelming thoughts were shoved out of the way.
When he felt like he could talk, Eijirou kissed his husband. "Thanks, Kats."
"As if I'd complain, dumbass. Now get the fuck off of me so I can make dinner before it's ten fucking thirty."
Eijirou kissed him again, pressing a kiss to his mouth this time, savoring the feeling. His husband kissing him back and no longer pushing him away.
Eijirou moved down on the bed, he would let Katsuki get back to dinner but at the moment he had to make sure he cleaned up what he started. It would be what a good dog did, after all.
He pulled Katsuki closer to the edge of the bed.
"What are you—"
Eijirou cut him off by leaning forward and licking up his pussy. Lapping up slick folds, dripping from his cum. And fuck he loved how they tasted mixed together. He had to laugh at how Katsuki batted him away the first time he tried to eat him out, sharp teeth and complaints of it being too gross; only to have the stubborn blond a moaning mess two weeks later.
Katsuki gasped out and grabbed him by the hair not pulling him away but rather pushing him down harder. Making sure Eijirou knew how much he liked it, how much he needed it too.
"Ahh—Good boy!"
Katsuki's thighs caged him in, if Eijirou could pick the way he died he would be fully content with suffocating between his husband's perfect thighs. Katsuki pressed Eijirou down as the redhead gave one more lick that sent the blond into bliss. Eijirou gave small gentle licks to his clit letting his husband ride out the rest of his orgasm.
Eijirou felt rough hands pull him back.
Katsuki was just as out of breath as Eijirou at that point. He looked at the redhead and sighed at how much of a mess his face most likely was, or maybe Katsuki was just trying not to blow up his husband who just fucking made him cum again.
He would have to shower again before bed now that he was all sweaty and really Eijirou was hoping the blond would drag him into the shower with him.
"You're a fucking horn dog," Katsuki grumbled.
"Woof," Eijirou grinned.
He was out of subspace by now but still liked the look he got from Katsuki anyway. He would definitely be asking his husband to help him more often.
Eijirou helped Katsuki up and the blond pushed him back.
"If my pot roast is fucked up you're dog bed is the couch," Katsuki muttered, pulling on Eijirou's boxers and walking back to the kitchen. "Eijirou you're fucking helping me, get the fuck out here!"
Eijirou pulled off his collar and leash, putting them on the nightstand and scrambling out to help Katsuki.
The blond looked over to the hallway, his face turning pink before he looked away. "Pants you idiot, put something on!"
Eijirou kissed him on the cheek before rushing back to their room for a pair of boxers since the blond stole his. He didn't really mind, it wasn't like he would be wearing them very long anyway.
If the redhead had his way his boxers would be thrown back onto the floor by his husband and the naked blond would be in the shower with him.
THE END
