Chapter Text
“What?” Katsuki asked incredulously. Deku’s face was bright red, but she didn’t look away from him.
“I… I want to have sex with you,” she mumbled. Katsuki’s brain nearly short circuited.
“You… do,” he asked, although it wasn’t really a question. She bit her lip and glanced around the room.
“We’re never going to have a more perfect opportunity,” she explained. “And… and I really want it. I have for a long time.” She smiled shakily. “But only if you want it too.”
“Fuck yes, I want it,” he breathed, leaning in to kiss her again. She moaned, leaning into him. He guided her back to lay down on the bed, hovering over her without putting weight down. She clutched at his tank top, trying to pull him down on top of her. He chuckled breaking away again to smirk at her. “I’m heavy, Deku.”
“I don’t care,” she said stubbornly, hooking her legs behind his back to yank him down. His hips landed flush against hers, and they both groaned at the friction. He rolled against her again, his stiff cock rubbing against her clothed pussy in the most delicious way. He could feel her heat even through the layers between them, and it might have just been the most arousing thing he’d ever felt. A moment later when Deku began kissing down his neck, he almost changed his mind. She licked the juncture between his neck and jaw and he couldn’t stop the moan that escaped him. She smiled against his skin and did it again, softly biting the skin there. He rolled his hips against hers again, and she whined as well. Of course, even this had to be a competition.
She pulled at his tank top again. “Off,” she panted. He nodded and raised himself on his knees, tugging his shirt off. She lay beneath him, legs spread to fit his body, her wide eyes drinking in the muscles of his torso. He allowed her to gawk at him for a moment longer before he came back down on top of her, one of his hands skating underneath her shirt to drag against the curve of her waist. This time it was him that kissed and sucked down her neck, listening intently for her breathy whines and moans to see what felt best for her. He scraped his calloused palm up her side until his fingertips brushed against the underside of one of her breasts. She wasn’t wearing a bra, of course, because she just loved to torture him.
“Kacchan,” she keened, raking her fingernails down his shoulders and back. “ Kacchan.”
He’d used to hate that babyish nickname, but at the moment, he’d never heard anything more melodic. The next rock of his hips dragged over her clit and she nearly squealed, arms and legs locking around his body like a koala. He laughed, biting the juncture of her neck and shoulder, sucking to leave a mark. He palmed her breast underneath her shirt, pinching at her nipple to add to the pleasure. The way she was wiggling underneath him, it was clear that she liked the pain. Fucking masochist.
“Deku,” he huffed against her skin. “Can I take your shirt off?”
She nodded frantically, lifting her arms above her head. He got to his knees again and grabbed the hem of the shirt- yes, it was definitely his- and slowly took it off, enjoying teasing himself with inch by inch of bare skin. Once it was completely off, he tossed it to the other side of the room along with his tank top. She moved her arms to cover her breasts, but he grabbed both of her wrists in one hand and pinned them above her head so she couldn’t. “Don’t fucking hide from me,” he snapped. “I’ve been dreaming about this for a long time, I’m going to fucking look.”
She tipped her chin in a slight nod, although her blush reached all the way down her neck. “It’s embarrassing,” she said. He shook his head with a crooked grin.
“You’re gorgeous, baby,” he purred. Her skin erupted in goosebumps, only widening his smile. “Oh, you like that, do you?” He leaned in closer, allowing his hot breath to brush against her ear. “ Baby.”
She whimpered, bucking her hips to try and relieve the pressure between her thighs. He ground his clothed cock over her again, briefly closing his eyes at the movement. “ God , you feel good. Can’t wait to be inside of you.”
“Now,” she demanded, straining against his hold on her wrists. “ Please , Kacchan, now!”
“No, I don’t think so,” he hummed. “I think I’m going to tease you for a bit longer.”
She kicked at his back petulantly. “You’re so mean!”
“Not mean,” he corrected, finally letting go of her arms. “ Patient .” He kissed the swell of one breast, then the other, causing her to dig her fingernails in his shoulders again. He ignored the twinge of pain in favour of sucking one of her nipples into his mouth, pinching at the other. When he scraped his teeth over her skin, she sighed, arching sinfully into the movement.
“I want you,” she said, her voice breaking. “I- I want your cock inside of me.”
He froze, glancing up at her. He pressed his palm against her sternum, dragging it down her abdomen tantalizingly until he reached the hem of her shorts. She kept arching into her touch, her body a sinuous curve of beauty. “You fucking know what your voice does to me, don’t you Deku?”
She nodded, a small smirk on her own lips now. “Yes,” she admitted. “If it’s going to speed things along, then I’ll use it.”
“Damn nerd,” he muttered, but slipped his fingers under her shorts. He was surprised to find that she wasn’t wearing underwear underneath, and his fingers immediately became coated in her slick. He groaned and closed his eyes, running a finger over her slit and up to the nub of nerves at the top. She bucked into the touch yet again, gasping sharply. “Payback’s a bitch.”
“Kacchan!” she yelped, trying to get him to press against her harder. “Please, i-inside!”
He looked down her body to where his hand had disappeared in her shorts. “Whatever you say, baby.” He ran his finger back down her lips until he met no resistance, slowly pushing his finger inside of her. The keen she let out echoed in his ears like a song. He felt like he could cum just from this- of the feeling of her tight, soft walls around his finger- and it was pathetic. He wasn’t some thirteen year old just going through puberty, he was not going to cum in his pants like one. As he pushed his finger and out of Deku however, watching her squirm and cry out, he began really questioning his resolve.
Finally, he couldn’t take it anymore. He retracted his finger from her and she huffed, glaring at him. He rolled his eyes at her impatience and grabbed the hem of her shorts with both hands, yanking them down her legs. She lifted her ankles to help and he tossed them off to the side with the rest of their clothes. She was completely naked now, as opposed to him still being in his sweatpants. It was nearly suffocating, but he didn’t care. Instead, he lowered himself until his face was right in front of her cunt. Her lips were puffy and pink, her slick coating every inch of her. He inhaled slowly, smelling her arousal.
“So perfect,” he muttered before he leaned forward and licked at her. She gasped, burying both of her hands in his blond spikes. The taste of her was a bit salty, but not at all bad. He continued with his ministrations, circling her clit with his tongue. Her thighs began shaking on either side of his head, her fists tightening in his hair. ‘ God, she’s so cute. I could do this for hours.’ He added his finger to the equation again, and it didn’t take long until he was slipping in another. She was getting wetter by the second, her moans and cries getting louder and louder as her walls clenched around his fingers. He gently sucked on her clit, curling his fingers upwards until he felt the spongy texture of her g-spot. Her thighs instantly clamped on either side of his head, and it didn’t take long before she began shaking, gasping and squeezing her eyes shut as she came.
He worked her through it until she pushed him away, panting and red-cheeked. “S-sensitive,” she stuttered. Katsuki crawled back up her body and cupped her cheek, kissing her. She probably tasted herself on his tongue, which was all the more alluring. He pulled away and kissed the tip of her nose. “We’re not done, yet.”
She nodded, biting her lower lip. “Take your pants off?” She asked shakily. He frowned a bit, not moving an inch.
“Deku, if you want to stop here-”
“No!” She interrupted. “No, I want to keep going, just-” she swallowed. “I’m a virgin.”
He blinked, then blinked again. “You and IcyHot never…?”
“With Todoroki ?” Izuku asked. “God, no!”
“And Glasses never try to hit that, either?”
“Do you have to be so crass?”
“It’s my brand.”
“No, he never tried to- have sex with me,” she forced out, wrinkling her nose. “He’s been half in love with Ochako since the first day of school.”
Katsuki tilted his head to the side. “So nobody has ever tried to fuck you?”
“W-well, not nobody …” she trailed off. “I, um. I didn’t want… anyone else.” She tightened her grip around his neck, clearly bashful. Katsuki nuzzled his face in her neck, pressing his lips to the bruise he had left there earlier.
“Me either,” he said. Deku smiled at him.
“I’m on the pill,” she told him. “So we don’t need a condom, if you don’t want one.”
He nodded, kissing her sweetly. It wasn’t long until their tongues were connecting once more, lewdly tasting each other, nipping on skin, moans and growls escaping them both. Izuku placed her hands on his hips and began pushing his sweatpants down, and he leaned back to help her out. He took his boxers off next, leaving his cock exposed to the open air. It was as red and flushed as could be, hard enough to cut diamond. He checked Izuku’s face, finding awe and trepidation there.
“You’re going to try and put that inside of me?” she squeaked.
Katsuki outright laughed. He knew he was bigger than average, eight or eight and a half inches, pretty thick, and curved slightly upward. The one time a girl had tried to give him a blowjob, she complained that her mouth hurt too badly to keep going and had left him there. He’d never tried again after that, because even what she had done was unfulfilling.
“You can take it,” he told her, slowly pumping his dick once. Deku’s eyes followed the movement, flashing with curiosity and hunger. He quickly took his hand off of himself, afraid that even the slightest amount of friction would make him cum if he had her to stare at. “You can always change your mind, though.”
Now, determination appeared on her face, and she scowled at him. “I can do it,” she declared, holding her arms out for him. He lowered himself back down on her, groaning when it brushed against her soaked entrance. In the next moment, Deku had wrapped her legs around his waist again and used it as an advantage, pushing her weight onto him until he was flipped onto his back. He stared up at her in surprise, his hands instinctively moving to her hips to hold her there. She grinned down at him, pushing her long curls over her shoulders so they wouldn’t hang in her face.
“Something tells me it will be easier like this,” she teased. “Just keep still for me, okay Kacchan?”
The thought of her using him to get herself off made his prick twitch in interest. He nodded, tightening his grip on her plush hips. She raised herself up onto her knees and reached behind her, grabbing his dick in her hand. She lined him up with her before she took a deep breath and began to sink down. Katsuki clenched his jaw, biting the inside of his cheek to keep from practically shouting. She stretched around the head before she stopped, her eyes watering. He forced himself not to buck up into that velvety heat, knowing that it would hurt her. He had the willpower of a god right then.
“Okay?” he asked her, his voice gruff. She nodded, braced her hands on his chiseled abdomen to keep herself steady. If they didn’t work out as much as they did, there was no way she would be able to keep herself level in that position.
“It’s just- it’s big,” she confessed. “But I can do it.”
“I know you can, baby.” he stroked her skin soothingly, encouraging her. After a few more moments, she let out the breath she’d been holding, inching further down his cock. He closed his eyes, trying to force away the expression on her face. Not cumming was the hardest thing he’d ever had to do, pun intended, but he was not about to ruin this for her because he had apparently become thirteen again. She was almost halfway down by the time he met resistance- deeper than his fingers had been able to stretch her. They both waited with baited breath when suddenly, she slammed herself down the rest of the way. They both yelped, Katsuki sitting up and grabbing her arms, and Izuku grabbing at his shoulders.
Tears fell from her eyes, and Katsuki cursed, pulling her into a tight hug. “Why the fuck did you do that, Deku?!”
“I wanted to get it over with,” she whimpered. “Just- just give me a minute.”
He rubbed at her back, tracing over the knobs of her spine. She pressed her face into his shoulder, breathing deeply. She was so tight , so wet, it was almost painful. He could already tell that he wasn’t going to last very long. ‘ Think of dead puppies, Katsuki. Think of Mineta naked. Ew, not that one, you need to stay hard.’
After what felt like an eternity, Deku nodded into his shoulder, pulling back. “O-okay. I’m going to try to move.”
He nodded back, leaning in to catch her lips in another kiss. “Okay baby. Go fucking slow this time.”
She used her powerful legs to raise herself up a few inches before she sank back down, rolling her hips a bit when she took it all once more. They both moaned, holding each other close. Katsuki was embarrassed to say that he felt a prickling heat behind his eyes from the sheer intimacy of their positions, but he was not going to let himself cry. (No matter how much he wanted to.)
Soon, Deku was able to slide his dick out all the way to the head before she sank back down again, tossing her head back to expose her throat. She was moaning louder now, her breasts bouncing a bit with each movement. Katsuki did his best to meet her movements with slow thrusts, although it was hard in the position they were in. His orgasm was building quickly in his gut, although honestly, he was impressed he’d lasted this long.
“Deku,” he hissed, leaning in to nip her throat. “Can I- I want to-”
“Do whatever,” she breathed, running a hand through his hair. “Please.”
Well, in that case. He grabbed her waist and braced his thighs, flipping them back over to their original position. She held onto his biceps, giggling a bit when he smiled triumphantly down at her. He reached down and grabbed her thighs just underneath her knees, pushing on them until her knees touched the mattress. He knew she was flexible from all the times she showed off that fucking ass of hers during yoga at the gym. With the new leverage, he was able to hit a spot inside of her that he hadn’t before, and it made her clench impossibly tighter around his length. Her mouth opened into a silent scream, eyes rolling back into her head.
He pounded into her without a care, feeling the scrape of her nails all down his back. Those would probably hurt like a bitch in the morning, but that was a problem for future Katsuki. For now, he focused on hitting that same spot inside of her, enjoying the sensation of her pussy pulsing around him.
“K-Kacchan!” She cried. “I’m gonna- I’m gonna-!”
“Do it,” he snarled, reaching down to rub at her clit. “ Cum .”
Her entire body shook like an earthquake from the force of her orgasm. Katsuki couldn’t take it anymore, shoving deep inside of her as he released as well. The two of them lay there with each other, both of their sexes pulsing in time with their rapid heartbeats. Once they both got their breathing under control, Katsuki slowly pulled out of her. She winced, scowling at the empty feeling, and he apologized. She then wrinkled her nose, closing her thighs together. “It’s leaking ,” she complained. He laughed, shaking his head.
“What did you expect, dumbass?”
“Don’t call me a dumbass when you just fucked me!” She slapped his shoulder and he rolled his eyes.
“Fine, shithead .”
She tried to keep frowning, but the mirth behind her eyes gave her away. He pressed one last gentle kiss to her lips before he stood up from the bed to get her a washcloth. By the time he got back into the bedroom, she was already dead asleep.
He cleaned her as softly as he could without waking her, tossing the dirty washcloth across the room with the rest of their clothes. He climbed into bed next to her, pulling her smaller body into his arms, purposefully this time. He fell asleep smiling.