Sweetheart - Part 6

The not-est of not safe for work. Seriously this might be the dirtiest thing I've ever written.

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Katsuki lay back on the bedcovers, letting Deku prop him up just right on the mound of pillows. They came in a mix of snowy white and ruby red covers, a lot like the living room theme, but for the life of him Katsuki couldn't work out who needed so many damn pillows.

Except, apparently, for Deku, who considered every one of them vital as he positioned Katsuki comfortably.

“There! Comfy?”

“Yeah.”

“Good! Okay, just relax, I'm gonna take really good care of you!”

He didn't bother to answer, watching silently as Deku coated his hand in lube and spread Katsuki's thighs. He was so damn gentle, as he rubbed at Katsuki's hole, watching for any sign of discomfort.

“It's fine,” Katsuki told him, his jaw tight. “Stop worrying.”

“Aww, Kacchan is already feeling needy!” Deku grinned. “We're gonna go nice and slow, Kacchan! I'm gonna tear you apart little by little.”

He leaned down, licking at the tight little hole, and Katsuki writhed under his touch. Another lick, more squirming, and this time a hand landed on his head, holding him close.

“Kacchan,” Deku tutted, taking the hand away. “You're not going to get what you want like that.”

“Ugh!”

“If you like something, you tell me,” Deku continued sternly. “And you tell me nicely.”

“Haaah?!”

“I want please and thank you and yes, Daddy, more!”

“Like fuck if I'm calling you that.”

“I guess that depends how bad you want it, doesn't it?” Deku smirked. “So, does my baby have something to say?”

“No.”

“You sure?”

“I'm sure.”

“Suit yourself.”

He returned to using his finger, slipping just the very tip inside and making slow circles to start stretching him out.

“You have such a cute little ass,” Deku praised, hitching a leg up to make room to bite his buttcheek. “You're all tit and no booty, but you make it look so good!”

“Excuse me?” Katsuki demanded. “I have a great ass.”

“Of course you do, sweetie,” Deku grinned. “The best ass ever.”

“Damn right.”

Deku looked up just in time to see Katsuki reaching out again, whether for him or for the cock between them he wasn't sure, but regardless, he swatted it away.

“I told you, Kacchan. Let me handle it.”

“You're so slow.”

“We have all night, Kacchan, we don't need to rush!”

“Fuck you and your fucking slow shit.”

He pulled the leg up a little higher, slapping three quick handprints onto the little butt. Katsuki growled, glaring down at him, but Deku only smirked.

“What happened to the language, Kacchan? Good boys don't swear.”

Katsuki opened his mouth, but Deku cut him off quickly with a warning look.

“Are you trying to make me gag you?”

Katsuki swallowed hard, and Deku scoffed quietly, reaching down beside the bed for his backpack. He'd brought a few changes of clothes with him, almost forgotten in his excitement over all the gifts, and buried right at the bottom he had something else, just in case.

“Get back up here,” Katsuki growled, reaching for Deku to drag him back. “The fuck're you doing down there?”

“Oh Kacchan,” Deku sighed. “You just don't learn, do you?”

He produced a length of soft rope, smirking when Katsuki's eyes widened. He'd spent many hours practicing with it, while he watched the news or waited for interviews – it was good for his hands, with all their twisted joints and injuries, no one had to know he had other ideas in mind too.

“If you can't be good, we'll just have to give you a little help,” Deku cooed, as he gripped Katsuki's wrists and began winding the rope around them. “I know you want to touch, but it's not your turn yet! You've gotta be patient, Kacchan.”

He finished his knots by securing him to the bed frame, watching Katsuki's confused eyes follow his touch. As soon as Deku let go, he tested it out, flooding bright red nearly down to his nipples when he realised what was happening.

“There, now those naughty hands will stay put,” Deku teased. “Do I need to gag you, or are you going to control your filthy mouth?”

“What the fuck, nerd.”

Deku sighed. He should have known.

“Open up, Kacchan.”

The man didn't move, but Deku helped him out, dragging his jaw down and hovering over him.

“If you use those teeth of yours, you'll be in big trouble, Kacchan.”

Katsuki finally seemed to realise what was going on, stunned into silence long enough for Deku to start sliding himself inside, keeping a careful grip on Katsuki's chin just in case he decided to be bad.

“You take it so well Kacchan!” he praised, when Katsuki swallowed hard but didn't gag. “What a good boy! Have you been practicing? Ohhh, have you been playing with our special toy while I wasn't around? What a lewd boy.”

Katsuki couldn't answer with his mouth full of dick, but he didn't try to bite or growl, just levelled Deku with a glare.

“No? Just a lucky boy with no gag reflex, then. Or I haven't fucked your little mouth hard enough to trigger it yet.”

To emphasise his point, he pulled back a little, thrusting back in roughly and feeling Katsuki moan around him. Little slut liked having his mouth fucked, who'd have guessed?

Well, Deku did, but that was beside the point.

He conceded his grip on Katsuki's jaw, trusting him to not be that cruel, and braced himself against the headboard as he began to thrust. Katsuki hummed on a particularly rough one, and Izuku moved a little quicker, breathing hard as he tried to maintain a steady rhythm while Katsuki drooled and moaned around him.

He finally gagged when Deku came, spilling into his mouth and refusing to give him any room to breathe or spit. It shot down his throat, making him splutter a little, but Deku didn't move until he felt Katsuki swallow around him.

“There's my good boy,” he praised, combing his fingers through blond spikes. “You feel so good, Kacchan!”

When he pulled back, Katsuki had a slightly dazed look on his face, like he still wasn't quite sure what had happened. He let Deku reach for a tissue from the nightstand, though, and lay still as he wiped drool and cum from Katsuki's lips.

“You're being much better behaved, now,” Deku smirked, nipping at his neck and feeling the head move, giving him easier access to continue. “Because if it feels so good to get your mouth fucked, it must feel amazing to get your ass fucked, right? And you know you've gotta be a good boy for me if you want that.”

Katsuki's eyelashes fluttered, and for a moment Deku considered getting straight to it – fucking him hard and fast with no time to breathe, pressing him into the mattress with all his weight, not letting him move an inch, just watching him moan and take it like a good little whore.

Except, of course, that was what Katsuki wanted.

“Okay beautiful,” Deku grinned, getting a little frown in return. “I'm gonna go back to prepping you now, so be good for me, okay? If you're a good boy, I'll fill you up real nice.”

Katsuki nodded faintly in his daze, probably not even aware he was doing it, and a brief flash of concern washed through Deku's mind, making his chest tighten.

“Say something for me, Kacchan?”

“You told me to keep my mouth shut,” Katsuki pouted. “Is this a test?”

“I don't think I said shut,” Deku smirked, watching Katsuki blush again. “Just no naughty words.”

“No swearing?”

“Uh-huh. Or insults.”

“Mmkay.”

Fears assuaged, Deku lay between his legs again, taking a nice long lick of the little pink hole. Katsuki gasped again, and Deku smirked as he licked once more, looking up to watch the pretty face contort as he struggled to breathe steadily.

“Something to say, Kacchan?”

He shook his head.

“Are you sure? You don't want to tell me you like something?”

Katsuki pulled a face, turning his head away before the tiniest little murmur came out of him.

“Keep doing it,” he said faintly. “More of... that. P-Please.”

“That's my good boy, you learn so fast!”

He sped up his pace, slipping his tongue through the tight ring every so often to stretch him a little, re-lubing his finger to add it to the mix. Amidst little huffs of air and bitten-off moans, Deku stretched him wide, until he could safely fit all his fingers inside without complaint.

Only then did he kneel, reaching for the bottle of lube again and slicking himself up. Katsuki watched, his chest heaving, as the nerd spread lube all over his already-hard-again shaft, and he moaned when Deku played with the tip.

“You want this in you, baby?”

Katsuki nodded.

“You're gonna have to do better than that,” he giggled. “What do you say, Kacchan?”

“Please.”

“Please what?”

Katsuki pouted, but Deku just waited, letting him gather his thoughts.

“Please, Izuku,” he said finally, a hopeful look in his eyes.

“Alright,” he giggled. “I'll give you that one, just this once. Next time I want something sexy.”

“You're sexy,” Katsuki mumbled, burning red again with Deku smirked.

“Thanks, Kacchan,” he grinned, rewarding him with another long lick. “But I'm nowhere near as sexy as you. So big and strong, pure muscle. Look at these thighs, look at this chest.”

“T-Touch me?” Katsuki requested, eyes darting away. “Please?”

“Of course, baby.”

He rubbed the tip of his cock against Bakugou's hole, watching his breath catch as he slowly pushed past the entrance. He tried his best to thrust down into the touch, legs curling desperately around Deku's waist, but with his hands bound he couldn't quite reach.

Deku watched in delight as he squirmed and whined, fighting to impale himself on Deku's dick, and he couldn't resist a little grin as he leaned over to bite a pert nipple.

“Still think you're not a bottom?”

“Fuck me! Please!”

“Not if you're gonna start using bad words again.”

“I'm sorry!” he whined, tossing his head back and arching his back as he searched for friction. “I won't do it again, just- just please, I need more. Please, Daddy!”

Deku nearly choked on his own spit, thrusting himself inside without a second thought. He realised too late that he probably should have gone a little slower, but Katsuki was already moaning and whimpering, grinding against him, his dick dripping with precum.

“God that's hot,” Deku said breathlessly, taking a firm grip on Katsuki's hips to hold him in place. “You're my good little baby boy, aren't you? Learning so fast.”

“Yes, yes, just- just please.”

“I will, Kacchan, baby. I just need you to calm down, relax for me, let me do my job and make you feel so, so good.”

Katsuki nodded, shaking with the effort it took to still himself, but when Deku began to move he quickly gave in, letting Deku have his way.

He'd never felt anything as sweet as the slide of Deku's dick through his ass, nailing his prostate with every single stroke and filling him up. He wasn't even sure how the dick fitted inside him, it felt huge, like the nerd was gonna split him in half. He wondered for a moment if they should have used a condom, but the nerd was nothing if he wasn't intelligent – if they needed one, he'd have used one for sure. Besides, it felt so damn hot having the cock raw inside him, pounding him until he thought he might burst.

“Gonna cum in you, Kacchan. Gonna fill you right up.”

Katsuki nodded, a tiny “please” parting his lips, and it sent Deku careening over the edge. He wasn't sure he'd ever cum so much in his life, and it was his second orgasm. He could see the bulge in Katsuki's belly, could see him swelling with the hot fluid, and he just kept thrusting, forcing it deeper.

Katsuki was lost in a long moan, and when Deku wrapped a hand around his cock he could only shift his hips shallowly, trying and failing to find the strength to thrust into it. Deku had promised, though, and he would never let his baby down. He jerked Katsuki hard and fast, the moan turning into more of a whimper before he finally came, spilling all over them both.

When Deku shifted his hand through the mess, he felt Katsuki's normally-flat stomach protruding under his touch. Even his pecs looked bigger, and felt softer under his touch when he squeezed them both hard.

When his dick finally started to flag, he slipped himself out, watching a river of semen and lube squeeze its way out of his hole and onto the blankets. It pooled around Deku's knees, in the little indents he made with his weight, but he couldn't even find it in himself to care.

“I think we need another bath,” he laughed breathlessly, reaching to untie Katsuki's tortured wrists. “We made a mess.”

“You messed up my bed,” Katsuki pouted, tipping his head up to see. “I wanted to sleep on my new bed.”

“Why do you think I bought the two-bedroom place?” Deku giggled. “The other mattress is just the same. Let's get cleaned up and go get some sleep.”

He dragged Katsuki up, waiting a second as more cum trickled out of him with the movement, and when things seemed to slow, he hauled Katsuki to his feet.

He wished he could pick him up properly, but Katsuki had grown in the time they were apart, and Deku... Deku had not. He'd thought maybe he'd grow some more, with All Might's quirk in him, but alas he was still what his gay friends liked to fondly call a cute-ass twink.

Oh, All Might's quirk.

With a little flash of green sparks, Izuku scooped Katsuki into his arms, giggling his delight as Katsuki blinked up at him in awe. He carted Katsuki back to the bathroom, sitting him against the wall as he heated up the water, aiming the shower head at his tormented ass.

“After this, I'll get you tucked up all comfy in bed,” Deku told him, as he cleaned semen out to the best of his ability. “Then I'll throw the blankets in the laundry, and make us some tea, and we can snuggle in bed before we go to sleep, okay?”

“Are you trying to seduce me?” Katsuki asked flatly, fluttering his eyelashes. “You really know how to show a man a good time, don't you?”

“Enough with the sarcasm, brat,” Deku laughed despite himself. “I'm gonna cuddle the shit out of you.”

Part 7!