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“Is that too tight?” Eijirou asked as he finished tying off the last knot to complete the intricate rope harness. The dark red rope was weaved around Katsuki’s ribcage, between his breasts, into a star pattern on his chest, while a black rope entwined with it to secure and immobilize Katsuki’s arms behind his back. “Katsuki?” he nudged, a warm hand rubbing over Katsuki’s side to get his attention.
“Huh?”
Eijirou couldn’t help but smile a little at the soft, floaty tone to Katsuki’s voice; a good sign that he was already deep into subspace. “Is anything too tight, babe?” he repeated, rubbing soft circles against his fiance’s hip right above where the waistband of the red lacy panties sat.
“Uhm.” Katsuki flexed his arms against the rope, hunching forward and then arching back both testing the knots to make sure they’d hold up and also making sure there wouldn’t be any unpleasant pinching. “Nah; ‘m good,” he said as he relaxed again, sitting back on his heels.
A shiver went down Katsuki's spine as Eijirou knelt on the bed and leaned in to press a soft kiss against the sensitive skin right behind his ear. “Good,” Eijirou’s voice dipped into a low rumble and that one word sent sparks of arousal through Katsuki’s body.
It was like a match was lit then, making Katsuki aware of just how turned on he was and bringing him out of the dazed relaxation that Eijirou’s hands looping rope around his body brought. “You gonna fuck me now?” Katsuki asked, turning his head to the side to set Eijirou with a determined stare.
The dark laugh that Eijirou let out pissed Katsuki off just as much as it turned him on. “Oh, I will... eventually,” he said, a hand roaming over the rope wound around Katsuki’s chest, fingers brushing against bits of skin showing until he was able to cup one of his breasts, brushing his thumb over the quickly hardening nipple, playing with the metal ring pierced through it. “Why, kitten? Are you already getting all wet for me like a little slut?”
Katsuki grumbled wordlessly to cover up the moan that wanted to come out, arching just slightly into the touch and gasping shakily as Eijirou tugged at the piercing. “Y-Yeah, you wish,” he growled, cursing at himself for stuttering.
It was hard to deny, though, Eijirou’s newfound confidence in bed and during scenes like this was fucking hot. The first several times they tried was... well it was never bad, but there was definitely a certain level of awkwardness at first when it was still new. Eijirou had been so hesitant, worried about getting too rough or saying the wrong things.
“There’s an easy way to find out,” Eijirou smirked, the hand that was on Katsuki’s chest trailing down over his stomach and Katsuki’s breath hitched as he realized where it was headed.
A deep red blush spread over Katsuki’s face, all the way down to his chest as he pressed his thighs together. He had to bite back another noise that wanted to escape at the pressure that caused on his aching cock. He couldn’t give Eijirou the satisfaction of knowing his panties were already damn near soaked, after all.
“Spread. Now,” Eijirou demanded sharply; the words shooting straight to Katsuki’s aching cunt and making his cock throb.
“Fuck off,” Katsuki bit out, trying - and failing - not to sound as breathlessly shaky as he felt.
“Thought you wanted me to fuck you,” Eijirou said. “Might wanna drop that attitude, kitten, if you wanna be fucked,” he added, brightly teasing him in an almost sing-song tone.
“I wouldn’t have a fucking attitude if you’d stop wasting time with stupid shit and - Ah!”
Katsuki’s words cut off into a shocked yelp as Eijirou grasped a handful of blond hair in a tight fist and wrenched his head back; forcing him to arch his back and shift his knees apart to keep balance.
Eijirou towered over him; absolutely glowering in a way he only did when they were doing this. The dark look on his face so different from his usually happy-sunshine-self that it knocked the breath out of Katsuki, his heart thudding hard against his sternum as he swallowed audibly around the lump suddenly in his throat.
“Watch your mouth,” Eijirou growled all low and gravelly, “Before I decide to spank your ass.”
An involuntary whimper came from Katsuki before he was even able to try to stop it; breaths coming out quick and fast and his pussy clenching around nothing and making more wetness soak into his panties.
As much as Katsuki wanted to say something - bark back some sort of snarky remark in return - he couldn’t get his brain to come up with anything coherent overtop of the blaze of arousal lighting him on fire.
Instead, he narrowed his eyes into a silent glare and halfheartedly struggled against the ropes.
“What’s wrong, sweetheart, cat got your tongue?” Eijirou teased with a smirk, the hand not in Katsuki’s hair slipping between his now-parted thighs to drag a few fingers over the wet fabric. Katsuki squeezed his eyes shut, biting down on his lip in an effort not to make any noise.
“Oh! And you lied to me,” Eijirou tsked disappointedly. He pushed the crotch of the panties to the side so he could press his middle finger between slick folds of skin, his ring finger joining in as he shoved both inside. “You’re fucking dripping, kitten.”
On impulse Katsuki spread his knees further apart, clenching around Eijirou’s fingers with a lewd and shockingly loud moan at the sudden stretch of Eijirou’s thick fingers. “Ei,” he breathed when those fingers curled towards his stomach and dragged down slick walls. “Fuck,” he gasped, breaths coming out in quick, little pants as he struggled against the urge to grind down against his fiance’s hand.
“I think you owe me an apology; being all mean and bratty, lying to me, disobeying me. None of that is very nice, Kats,” Eijirou scolded, loosening his grip on Katsuki’s hair and letting him sit up again. His other hand stayed where it was, two fingers buried in Katsuki’s cunt, lazily rocking against the sensitive, spongy patch of flesh just inside.
It wasn’t nearly enough to get him off, but it did stoke that fire within him and make it increasingly harder to stay still and not rock his hips back against those fingers.
“Never said I... that I’d be - ngh - nice,” Katsuki managed to grit out.
“You know, the more I’m thinking about it, the more I’m thinking that maybe I shouldn’t let you cum. I mean... you’re not being very good right now and only good boys get to cum,” Eijirou threatened in a frustratingly conversational way even as he angled his hand so the heel of his palm was pressed firmly against Katsuki’s swollen cock, grinding against the sensitive flesh every time he moved his fingers.
“Eijirou,” Katsuki groaned in a low, but breathless growl.
“I’m sorry, what did you just call me?” Eijirou asked, fingers stilling inside of Katsuki as he waited.
“Your fucking name, dumbass!” Katsuki snapped in a surge of frustration-fueled anger. “Now - Ah!”
Katsuki’s whole body jerked as Eijirou wrenched his hand away, leaving Katsuki’s panties all skewed and bunched and his cunt painfully empty, to instead shove those same two fingers, still soaked in Katsuki’s slick, into his mouth. It effectively prevented Katsuki from being able to speak, a muffled cry of protest coming from him.
“That’s Sir to you right now, dumbass,” Eijirou snarled back.
Katsuki’s eyes widened up at him, jaw going lax in surprise and a tiny whimper coming from the back of his throat because holy shit that might’ve been the absolute hottest thing Eijirou’s ever done.
There was a split-second pause, a hesitation to make sure that nothing had been taken too far and giving Katsuki the chance to tap out before Eijirou was speaking again.
“I’m going to give you one more chance,” Eijirou growled, “Apologize and take your punishment like a good boy or you’re not going to cum for a week.”
Katsuki darted his eyes away from Eijirou, looking off to the side and scowling as he slowly pulled his hand back. With a displeased groan, Katsuki swallowed the mix of spit and slick that had pooled on his tongue and jerked his head down to stare at the bedsheets. “I’m sorry,” he huffed out, gritting his teeth and screwing his eyes shut before he added, “Sir.”
There was another hesitation and Katsuki could feel a warm hand settle gently on his back between his shoulder blades. “Color?” Eijirou asked softly and Katsuki knew the check-in was more of a way to quiet Eijirou’s doubts than anything else.
Looking back up, Katsuki locked eyes with his fiance - all traces of the hard dominant facade gone for the moment - and grinned at him. “So fucking green, babe, that was hot as fuck,” he said, not wanting Eijirou to have any doubts.
“Good,” Eijirou chuckled, leaning in to kiss Katsuki softly. “Now...” his voice dipped low again as he pulled away, the hand on Katsuki’s back shoving him forward not-too-kindly and pressing him down chest first against the bed. “I can’t let that brattiness go unpunished, can I?” he hummed, the hand not pinning Katsuki to the bed running down over his hips to tug those panties down around his thighs. “Twenty swats seems fair to me.”
Katsuki grumbled wordlessly, letting Eijirou pull his hips up higher so he was ass-up, chest-down on the bed. He felt one of Eijirou’s hands smooth over his left asscheek and braced knowing what was coming next. The impact still punched the air out of his lungs in a gasp, skin stinging where Eijirou’s hand had come down on.
He was barely given a break before another hit landed on the other cheek. The sting of pain and the way Eijirou was pinning him - helpless to do anything but take it with the knowledge that all he had to do was say one word to end it if he truly wanted to - just made his heart pound hard in his chest, blood running hot and sparks of arousal accompanying every harsh hit.
By the time Eijirou landed the last hard smack against his red ass, Katsuki was shaking. The pent up arousal was damn near more painful than the bruises blooming on his backside, cock throbbing in time with his heartbeat and pussy clenching around nothing.
“Think you’ve learned your lesson, kitten?” Eijirou asked, sliding a hand between Katsuki’s thighs to tease his thumb over slick folds of skin.
“Yes, sir,” Katsuki rasped out as he pressed his hips back in an attempt to get more friction from the teasing touch. “Just - ah - fuck me, Ei - Sir, please. Please fuck me,” he moaned.
“Now that’s what I like hearing,” Eijirou chuckled, “My slutty little kitty begging for me all desperate like some cheap whore.”
“Ngh, please,” was all Katsuki could find it in himself to say, his whole body trembling when Eijirou pressed his thumb firmly against his cock. “O-Oh fuck,” he gasped, eyes fluttering closed as Eijirou started rubbing slow, small circles against the heated flesh. “Eiiii, please,” he whined, breathy and desperate. “No!” he shouted in protest at the loss of friction when Eijirou pulled his hand away.
“Shh, baby, I’ve got you,” Eijirou soothed, shifting on the bed to kneel between Katsuki’s feet. “You did so good taking your punishment without a fight, kitten,” he cooed, running a hand down the length of Katsuki’s bound arms before Katsuki could feel him tugging at the knots around his hands. “Keep being good for me and I’ll take such good care of you, baby,” he continued as he worked on untying Katsuki’s hands.
Within moments, Katsuki’s arms were free and Eijirou was tossing the black rope off to the side. “Finally,” Katsuki scoffed, rolling his shoulders and shifting to get his arms underneath him and into a more comfortable position.
“You’re welcome, kitten,” Eijirou said pointedly, brushing the back of his knuckles over the bruising skin of Katsuki’s ass as a silent threat.
“Tch, for what? You’re not fucking me yet so - Ah!” Katsuki yelped when Eijirou smacked his already sore ass. Not nearly as hard as before, but it stung just as much.
“Use your manners, slut, otherwise I’m not gonna fuck you at all,” Eijirou threatened, leaning down to drape over Katsuki’s back. He supported himself with one hand, using the other to grab a tight fist full of Katsuki’s hair. “And wouldn’t that just be such a damn shame?” he whispered against Katsuki’s ear, grinding his cock - hard and leaking - against Katsuki’s ass. “Just letting such a wet, slutty little hole go unused?”
“I - I…” Katsuki struggled.
“You know what I want to hear,” Eijirou muttered darkly.
Katsuki swallowed hard, gritting his teeth and squeezing his eyes shut against the warring embarrassment and arousal. “I… I’m sorry, sir,” he gritted out.
“And?”
“A-And thank - ngh,” a shudder went through Katsuki’s whole body when Eijirou’s erection slid just so between those slick folds of skin and rubbed against his oversensitive cock. “Thank you for untying my arms,” he choked out, face burning.
“And?”
Katsuki sucked in a shaky breath, letting it out in a little whine as he wiggled his hips back in an attempt for more friction before Eijirou’s grip tightened painfully on his hair. “Ah, c-can I… Fuck; c-can I please have your cock, sir?” Katsuki asked in a trembling whisper, feeling tears sting his eyes from the mix of desperation and embarrassment.
“There’s my good kitty,” Eijirou praised in a low rumble, the words soothing some of that desperate ache deep within Katsuki. He let go of the mess of blond hair, smoothing it down and pressing a soft kiss against the base of Katsuki’s neck before sitting back on his knees again. Katsuki’s breath hitched when he felt the head of Eijirou’s cock press against his hole, a little shaky moan coming from him. “My slutty little kitten,” Eijirou purred, one hand gripping one of Katsuki’s hips to keep him still as he slowly pushed in.
“Ahhhh,” Katsuki whined all raspy and breathless as he was stretched open on the thick cock. A shudder went through his whole body when Eijirou bottomed out inside of him, stuffing him full.
“Fuck,” Eijirou cursed in a low moan, grinding in deep and relishing in the way Katsuki’s whole body shook. “So fuckin’ good, baby,” he muttered breathlessly, another low groan leaving him when Katsuki clenched around his cock.
Though Katsuki couldn’t help but press his hips back against his fiance’s, letting out a little frustrated whine when Eijirou didn’t immediately start moving. “Ei,” he complained, squirming and trying to roll his hips back. “S-Sir,” he corrected when he realized his mistake, though Eijirou didn’t even seem to notice, “Please.”
“I’ve got you,” Eijirou assured, his other hand coming up to slide up Katsuki’s back until his palm was firmly between his shoulder blades. The moment he pressed down, Katsuki let his upper half go limp against the bed with another little whimper. “Gonna fuck you so good,” he promised, leaning some of his weight onto Katsuki’s back to keep him firmly pinned and tightening the grip he had on Katsuki’s hip.
“Are you ready?”
The low, gravelly, dangerous tone to Eijirou’s voice sent a shiver down Katsuki’s spine, pussy clenching tight around his cock again in anticipation as he nodded against the bed. “Y-yes, sir, please.”
They both moaned when Eijirou slammed back in after pulling out halfway the first time, repeating that a couple more times before gradually speeding up until he was ruthlessly pounding into him quick and hard - talking filth the whole time that just stoked that fire in Katsuki.
“Fuck, you’re always so - damn - tight, a-and - shit - so wet, goddammit. Such a slutty fuckin’ cunt tryin’a - ah - suck me in, fuckin’ clenching around me all - all needy,” he babbled, leaning harder on Katsuki; that hand between his shoulders being the only thing keeping Katsuki from sliding forward with each hard thrust. “Fuckin’ love it. How - oh fuck - how pliant and needy you get when - ngh - th-the second I get my cock inside you. Sh-Shit, you just fucking melt.”
Katsuki was helpless to do anything but gasp in breaths, letting them out in shaky little whines and moans. He was completely lost in it by then, head swimming in that fuzzy, warm, blissful headspace that only being surrounded and filled up by his fiance could bring. The sharp edge and intense ache of needy arousal had dulled into a pleasant buzz, sparks of pleasure jolting through him from his core all the way to his fingers and toes with every thrust.
The swirling warmth and tension between his legs steadily built without him hardly even noticing it until he was damn-near cresting over that edge. Almost to that breaking point and sweet, sweet relief.
His whole body was thrumming in time with his heartbeat, cock throbbing, slick walls trembling, and head spinning with how fucking good it all felt just teetering precariously on that edge, about to tip over and then…
It all stopped.
Eijirou pulled out completely, lighting just about every nerve in Katsuki’s body on fire in the worst way possible and sending pure, raw need flooding through him at the denial.
“No!” he all but screamed.
“I’m sorry, kitten, were you about to cum?” Eijirou taunted, panting softly but still managing to sound downright insidious.
“Yes!” Katsuki sobbed as that pleasure faded back into an even more painful ache than before.
“Hmm… Weird, I don’t think I heard you ask if you could,” he said. “As much as I love those pretty little noises you were making, you know you’re supposed to ask, baby. Wouldn’t it have been just such a shame if I was forced to ruin your orgasm because you broke the rules?”
Actual, honest-to-God tears flooded Katsuki’s eyes and spilled over at the thought of his orgasm being ruined right now. “Please, sir, please. Please let me cum. F-Fuck, please. I-I need it, I… ah - I need to cum. Please, please, please make me cum,” Katsuki babbled nonsensically.
The low, rumbling laugh Eijirou let out sent a jolt of fear through Katsuki’s veins and made his breath catch in his throat. “Fine, you can cum,” he said, slowly pushing back into Katsuki, a but hanging heavily in the air as he bottomed out.
Katsuki couldn’t find it in himself to really care, though, moaning softly and trying to grind back against him to no avail thanks to the bruising grip Eijirou had on his hip.
“But,” there it was, “I’m not gonna stop after you do. No matter how many times you cum. No matter how sensitive you get. No matter how much you beg. I’m not slowing down or stopping until I’m satisfied. Understand?”
“Yes - Yes, just - f-fuck, please,” Katsuki whined, squirming as much as he could in Eijirou’s grasp.
“Good boy,” Eijirou rumbled as he slowly pulled out until only the tip was still in before slamming back in even harder than before and immediately setting a downright brutal pace.
The hand gripping Katsuki’s hip let go in favor of sliding down over Katsuki’s abdomen, fingers stroking through the patch of coarse blond curls before dipping down a little further to find his swollen cock.
It didn’t take long after Eijirou started to rub circles against his aching cock for Katsuki to feel that tension building again and quickly, too.
The dual stimulation shoved him right over the edge into an intense orgasm. Katsuki’s mouth opened in a silent scream, cock pulsing in time with his heart which was pounding bruises against his ribcage, and cunt clenching rhythmically around Eijirou’s cock - still pistoning in and out of him.
It seemed to never end, too. Every time Katsuki thought he was coming down, another wave of pleasure washed over him until all that tension finally gave way…
And turned right into overstimulation.
Eijirou didn’t show any mercy, either, still slamming in at the perfect angle to hit Katsuki’s G-spot every damn time and still stroking over his cock. An equal mix of equally sharp pain and pleasure wracked Katsuki’s body, forcing little sobbing whimpers out of him and making him only vaguely aware of how he was drooling against the bedsheets.
If Eijirou was saying anything, Katsuki didn’t hear it over the ringing in his ears and the sound of his own heartbeat drowning everything out as he felt another orgasm start to build. It wasn’t as intense as the first, more of a relief as pleasure won out over the painful oversensitivity, crashing over him in waves.
But then Eijirou kept going and it didn’t take long for those waves of pleasure to dip back into the sharp painful pleasure that was just too much and overwhelmed every muscle, nerve, and bone in Katsuki’s body.
At least that’s what it felt like. Jolts of sharp pain shot out from his aching cock through his thighs and stomach, forcing pitiful cries out of him between gasping breaths and shuddering sobs.
He blindly reached down with a shaking hand to try and grab Eijirou’s wrist to at least get him to stop touching his cock, babbling incoherent pleas that vaguely sounded like Stop and Please and I can’t.
Nothing even resembling their safe-word, though.
So Eijirou ignored those weak tugs at his wrist, but he did slow his fingers down a little bit even as he kept chasing his own pleasure. Pressure started to build low in his gut as he pounded into Katsuki; groans and curses spilling from his lips and mingling with Katsuki’s desperate cries and sobs.
And fuck, just seeing his fiance turn into such a goddamn mess was the hottest thing ever to Eijirou.
Face red, tears spilling onto the sheets, mouth open and drooling, walls clenching down around him, slick fluid literally dripping out from around his cock from Katsuki squirting and darkening the sheet beneath them.
A string of No’s came from Katsuki suddenly, slurred out and increasing in volume until he was screaming wordlessly and clamping down on Eijirou’s cock so hard it almost hurt. Fluid gushed over his fingers, dripping down Katsuki’s thighs as he squirted again and that’s what sent Eijirou spiralling over the edge, too.
Eijirou panted harshly as his thrusts turned erratic, grinding in one last time as he unloaded deep inside of Katsuki with a shaky groan.
It took about two hours for Katsuki to be fully coherent again.
During which time Eijirou untied the rest of the ropes from Katsuki, ran a bath for him, and made him drink a big glass of water and eat some peanut-butter crackers.
There were some weak protests and complaints about Eijirou babying him, but it didn’t take much insistence at all for Katsuki to let Eijirou bathe him and help him get dressed.
Only once they were both clean, rehydrated, and had clean sheets on the bed did they settle in for the night.
“How’re you feeling?” Eijirou asked softly as Katsuki flopped onto his chest and tangled their legs together.
“Fuckin’ sore everywhere,” Katsuki complained hoarsely.
“Ah, sorry,” Eijirou frowned, face heating up in shame. They’ve definitely played with spanking and overstimulation before and Katsuki preferred rough, hard sex to anything else but… they’ve never gone quite that far before with it all. “I guess I went a little overboard, huh?”
Katsuki jerked his head up to glare at Eijirou. “Are you fucking kidding me? Did you hear me safeword at all? No, of-fucking-course-not,” he scoffed, “I’ve been wanting you to do that for fucking years, Ei. Kept tellin’ ya you won’t break me, dumbass. You believe me now?”
“Yeah, yeah, I got it,” Eijirou chuckled.
“Good,” Katsuki snorted before nuzzling back down against Eijirou’s neck.
There was no stopping the way Katsuki melted against his fiance when Eijirou pressed a kiss against the top of his head.
“I love you,” Eijirou muttered against his hair, rubbing a hand softly up and down his spine.
“Yeah, I know,” Katsuki huffed, “I love you, too, you dork.”