Archive of Our Own ^beta

Chapter Text

It's an odd feeling, Y/N thought. Ovulation was so much more intense when nitroglycerin fled through your veins like a cube of ice cold butter on a 300° cast iron skillet, crackling under her skin with intense fervor. Class at U.A. was hell, especially when staring at the back of Izuku, her brother, Katsuki's childhood friend, and her longtime crush. Sometimes the heat that pooled between her thighs was so intense she had to bite her finger, a constant reminder of her divine need were teeth marks that had scarred over long ago on her index finger.

Y/N laid on her bed, struggling to keep her breathing in check as her fingers trailed down her stomach over the fabric of her school uniform, a tantalizing sensation as she imagined Izuku's large and rough hands, scarred in their own right as they reverently exploring her dips and raises. Her nipples were raw from how deep she was breathing, the rubbing against the fabric making it almost painful. She could almost feel the wet heat soaking through to the back of her skirt. Her hands lowered until her fingers were hooked under the hem, lifting up and revealing herself to the mirror on the back of her bedroom door, giving herself the view that was sinful even for her. Her panties were visually damp, thighs glistening, and breathing ragged.

Y/N needed that friction, something, anything that would relieve this pressure building in her core. With one swift movement, Y/N's two middle fingers of her right hand were rubbing through the cloth of her panties, teasing her own clit, and an immediate whimper leaving her lips, failing to be quiet. It felt too good, she thought. Doing this shouldn't feel this good. Her other hand quickly clasped over her mouth, as her fingers slipped under her panties to continue with direct contact. She was gooey and sticky like jelly, the smell filling her brain making everything worse. She was so close, her eyes closing for a moment. "I-Izu..." Y/N moaned slightly, her eyes cracking up slightly before flying open and a yelp leaving her lips.

Standing with his back leaned against the mirror was her Irish twin brother, Katsuki, exactly 10 months apart in age. He looked at her angrily, but the tent in his joggers was beyond telling. "Oh, don't stop on my account, Y/N. Keep moaning that Deku's name." Katsuki growled. Y/N couldn't believe she'd been caught, but that he was telling her to continue.

"Kats...I...I didn't think you'd hear me..." Y/N tried to reason through her ragged breaths and loss of her orgasm, Katsuki gritted his teeth and walked to her.

"I said, don't fucking stop." Katsuki spat, pushing her head back down to her pillow as he got between her thighs with his hand, his knee keeping her legs separated as he touched her clit. "Genuinely, you might the sluttiest fucking girl this side of Japan. Deku? Really? Even Dunceface would be a better option." Katsuki was clearly livid, and Y/N couldn't even comprehend what was happening other than the blinding pleasure building behind her eyes. "Moaning his name," Katsuki continued, his breath rough in her ear as his rough and callused fingers sped up their abuse on her clit. ,"You still gonna moan it while I take you like this?"

A guttural cry ripped from Y/N's throat as her orgasm was building once more. Fuck, this was so wrong, but goddammit if she was flooding from her cunt onto the assault from his fingertips. "K-Kats...please...I...I'm so-"

"Nuh uh, nope...sorry isn't gonna cut it, slut." Katsuki spat, slowing his circles to a stop. "Open your fucking mouth."

Y/N obeyed reluctantly before he grabbed her by the jaw, spit into her mouth, and then shoved the fingers of his that were slick with her heat into her mouth. "Clean them, they're disgusting all because of you." Katsuki grunted as his other hand worked to lower his sweats just enough to pull himself out, precum jewels beading down his shaft, his free hand now fisting its length.

Once more she did what she was told, sucking and licking Katsuki's fingers clean as he grunted from his own masturbation. How had Y/N never noticed how hot he was? Even in all his anger, crass, and mean nature, the demanding nature of his actions in this moment was making her gush more than Izuku ever had. She wanted him, wanted more, just for him to stop before he got to the turning point and she was starting to get light headed.

"What, slutty girl wants to cum, huh?" Katsuki groaned, fisting his cock faster before pushing her to flip. "On your fucking stomach, whore."

Y/N moved, but clearly not fast enough as he forcefully flipped her, flapping her skirt up and ripping a hole in the center of her panties. "God, look at you, Y/N, fucking soaked, was this Izuku? Or are you just that much of a cumsleeve that your brother gets you this hot too?" Katsuki growled before notching the head of his cock into her cunt, and when Y/N couldn't respond, he slapped her ass with a powerful shrill thwack, causing Y/n to gasp. God, he was too fucking big and it was still just his head.

"Kats..." Y/N whimpered, gripping her pillow as she panted.

"Oh, don't 'Kats' me now, bitch." Katsuki grunted, slowly sinking into her inch by inch. "What did you think was going to happen, with you whimpering, mewling and moaning into your hand as you think about that damn Deku. That i'd just be disgusted and walk away, no, I'm going show you what you should be fucking whimpering in the name of." And with that, Katsuki bottomed himself out into her, his balls kissing her pink star before he pulled out to his tip, then slamming back in, settling at a slow but hard and deep pace, immediately causing Y/N to see stars. "You fucking chose this, brat."

Y/N couldn't do anything but make sweet noises, the sound of Katsuki's grunts shot straight to her core that was tightening up. "K-Kats, p-please...I..."

"Please, what? Spit it out, sis...begging dear big brother to go faster? To let you cum your dirty incestual sticky heat onto my big cock? Hm?" Katsuki's thrusts got faster but no less deep in its reach, his tip kissing her womb with every push in, his hand pushing her hips down to keep them from bucking. Katsuki was grunting, feeling closer by the second. His words are sinful and dirty making everything feel almost ten times as intense.
"Gonna...c-cum..." Y/N damn near sobbed, and she cried when Katsuki slipped out, flipping her on her back once more, and lifting her legs to have them pressing her thighs closed on his cock while he rested her ankles on one of his shoulders.

"You don't get to fucking cum til I do, whore..." Katsuki moaned as he got off with her messy thighs. "Who's this pussy belong to now, hm? Say it."

Y/N whimpered but didn't respond, too focused on the loss of her orgasm to even really hear Katsuki.

Wrong answer.

Katsuki slapped Y/N's ass hard, letting off a tiny explosion to make a little burn to do so. "Fucking say it, sis...tell your big brother who owns your fucking cunnie." *Katsuki spat. "I'll won't fuck you until you say."

"My pussy belongs to you, Kats, please...please...just don't stop...please, let me cum...fuck..." Y/N folded under minimal pressure, needing her heat quelled immediately.

Katsuki just chuckled before pushing her legs up to her shoulders, her thighs gripped tight by his big hands, putting her into a deep missionary position as he slammed back into her. "Good girl, fucking take it then...take it like a fucking champ you fucking cumslut...that's all your fucking good for anyway..." Katsuki moaned, getting dangerously close himself. Y/N just mewled, moaned, and whimpered. Her eyes struggled to focus on anything other than her oncoming orgasm.

"Please...g-gonna...cum..." Y/N cried, her breathing rough in her chest as the back of her throat turned hoarse from the volume of her moans. Katsuki just made a cute whimper from the pleasure of it all, lay on top of her and moaning and grunting in her ear.

"Cum then...just cum, Y/N...Cum with me..." Katsuki moaned. "Five..." Oh, God...he was counting down, was all Y/N could think. "Four..." She was so close, her cunt was clenching and gripping his cock so tight, Katsuki feared he may lose it in her. "Three..." Y/N could do nothing but whimper at this point, stars invading her vision and her nails digging into his shoulder. "Two...One...Fuck, cum!" Katsuki yelled, rushing the last two numbers as he began to spill every bit of his contents into her, his cum practically shooting directly into her unprotected womb, Y/N was no better as she writhed and yelled beneath him. "Yeah...fuck...fuck...I...shit..." Katsuki grunted as he continued to thrust to ride out his orgasm, Y/N twitching and crying as her orgasm had barely begun to subside. "You took it so well, look at you..."

"I'm home!" The two heard from downstairs, and they both froze, any plans for aftercare were stolen from them as Katsuki quickly pulled his joggers back up to cover his messy and softening cock.

"Not a fucking word." Katsuki grunted, the nicest thing he managed to say before slinking back to his room, leaving Y/N alone with her brother's seed coming out in pearly globs from her used up cunt.

Chapter Text

Dabi, the burned villain, had been far too bored for far too long in that broken down bar. The plan was to only walk around the block, to stretch his legs and people watch. At least until he saw her. This girl in some local high school uniform, headphones on, oblivious to the world around her; a sorry mistake this late at night and in the Kamino Ward no less.

Before Dabi knew it, he was following her from about 8 feet back, seeing where she planned to go. She'd hum music outwardly, smile politely to some passersby, but otherwise didn't speak. The swish of her skirt that clearly she had somewhat outgrown considering when Dabi walked behind her at just the right angle, he could see her laughably adorable panties that were some childish display of cartoons, it made Dabi wonder if she was bare under there, unblemished and untouched. Dabi was getting hard and he knew he wasn't going to have the patience to wait to get his hands on his prey for much longer.

Looking around to see if anyone was around, and thankfully they were alone on this side of the street, when Dabi ran up behind her, hand over her mouth, his breath heavy in her ear. "You scream, you die. You're going follow me and be fucking useful."

The girl whimpered into his hand, looking into his eyes with fear as her headphones fell to the ground, left and forgotten as she was dragged off down several alleys and walkways until they were in the bar. Shigaraki looked up from one of the detached hands he was holding and gritted his teeth. "Who the fuck is that?"

"Don't fucking worry about it." Growled Dabi as he shoved the girl into a side room down the hall. Inside was a floor mattress, some beat up drawings framed on the wall, a desk with some books, and a dresser of clothes. Dabi’s hard chest pressed against the girl’s back.

“Lay on the fucking bed and don’t fucking move.” Dabi spat, shoving the girl onto his bed. All the girl could do was pathetically whimper and cry.

“Please…I’m…just a girl…I…My name’s Y/N-” Was all the girl managed to say before she was slapped across the face.

“Did I say you could fucking talk?” He was pissed, clearly. It was like she was teasing him on purpose, the feeling of his cock twitching and hardening in his jeans was enough to make him even angrier. “You just shut the fuck up and take whatever the hell I give you, got it?”

Y/N just cried as she watched him keep his jeans on, but took his shirt off. The high school uniform makes the sobs in the girl’s chest more noticeable and impossibly hotter for Dabi.

“Now…” Dabi grumbled, laying down, his face inches from her clothed cunt. “I’m gonna eat, and you’re gonna cry…and don’t fucking think about telling me to stop.”

She smelled divine, her pussy weeping into her adorably childish panties, almost ironically so in comparison to how much crying she was doing in protest. Her body clearly knows what it wants better than she does.

Burying his nose into the damp cloth, taking a deep breath Dabi felt almost intoxicated, rubbing his nose and smelling her heat was enough to make deliciously cute whimpers and sobs leave her throat while he felt himself twitching against the fabric of his own jeans.

With his hands he kept her thighs open, he looked up at her.

“Give me your hand.” He demanded.

“No, p-please…please stop…” Y/N sobbed, clearly unwilling, something that only made Dabi angrier. He forcefully grabbed her hand and made her hook her panties, making them push to the side. And the view was everything he thought it would. The lips glistening with unrestrained need, her hole clenching around nothing in anticipation, her skin waxed, the only hair in the shape of an adorable paw print right above the beginning of her pretty slit.

“Keep fucking holding that or so help me fucking god.” Dabi spat, digging his nose to her clit while he tongue made quick work of her sloppy hole, wet heat dripping down his chin in seconds. Her moans were delectable, and Dabi’s cock, with all its twitching in his jeans at the point to be getting enough friction to make him toss himself over the edge.

“Please…please don’t…” Y/N cried, her free hand reaching to push his head away, but flames licked out of his palms and onto her thighs, causing her to scream.

God, she was whiny, Dabi thought. He liked it though, the way she begged for some reprieve, how long has it been since he was able to take someone like this? Too long.

He had felt the build up, felt the amazing friction in his pants and the delectable taste on his tongue alongside the sweet cries of some innocent teen underneath him, it was no surprise when he felt him release into his jeans, completely untouched, his grunts loud and vibrating against Y/N’s clit.

“Fuck…yes…” Dabi grunted, standing up. “Don’t fucking move, I’m not fucking done.”

Dabi began pulling his jeans down, the girl’s eyes widened at the cummy mess that was his cock despite the stiff pole it still was, Dabi moved to straddle her chest. “Fucking suck me clean, pretty girl, come on.” She shook her head, keeping her mouth shut, but he forced her mouth open, shoving his full, burned length into her throat. His cum tasted tangy and sweet at the same time, and for a moment, Y/N let herself enjoy it, something that horrified her instantly but Dabi caught on quickly.

“Oh, little whore likes being face fucked, huh?” Dabi laughed and moaned, grabbing a fistful of Y/N’s hair and shoving her face down to meet the unforgiving thrusts of his hips. “Then fucking take it, take it like slutty little princess, hm?”

Dabi might have been quick to cum, but he could always go multiple rounds, something he’s dealt with his whole life since the fire, the fire having done severe nerve damage making him more sensitive to pleasure and touch. Her mouth sent every frayed nerve of his into ecstatic shock. His breathing deep and rough, coming out like a growl from an untamed beast. “Fuck, use your pretty tongue like that…yes…”

Y/N hated to even admit it, but her brain was starting to not even care anymore, letting her feel the depths of the heat that was his cock on her tongue and her fingers now between her pussy lips. Maybe if she just let herself enjoy it, it won’t be nearly as mortifying. She moaned as he used her mouth to its deepest reach.

“Fuck yes, letting yourself enjoy it now, huh, brat?” Dabi grinned sadistically as he held her head down, making her choke and gag on it as he came unexpectedly straight down her throat, once more tasting that tangy sweet sensation on her tongue. With a rough pull of her hair she was made to look at him. “Keep your pretty legs open, baby…gonna use you up until you can’t even deny that it feels fucking fantastic.”

His hands held her down as he kissed down the column of her throat, lining his still solid cock up with her flutter hole. “Tell me, have you given in yet? Hm? Letting yourself finally feel something that isn’t mindlessly studying?” He growled with a grin, pushing into her with one thrust, coming to the hilt as she yelped, her hymen rammed through with no care for her pain. Y/N’s face was one of anguish and reluctant pleasure, her eyes swimming in tears, her mouth agape, and her eyebrows knitted together in terror and concentration as he began to move.

“I…no…I…it doesn’t…fuck…yes, yes it does, don’t stop…” Y/N murmured, a look of unabashed shame on her face as she began to moan and bite her lip, letting herself feel the full brunt of the assault on her cervix. And a feeling that has never occurred within Dabi took over.

Pride.

And fuck did it feel so fucking good, Dabi thought. Her hands coming up above her head on his pillow as he rammed himself into her. Her eyes no longer filled with tears of fear or disgust but finally caving into the human need of mating like animals. Her moans like music and her lips rosy from the cock sucking she clearly excelled at. God, he might have found the perfect girl, if he hadn’t already chosen her. “Fuck, Y/N, gonna fill you up again…you ready?” Dabi moaned, his moan softer than any noise he’s ever made before.

Y/N just whimpered and nodded, reaching up and bringing him down to her where she kissed him hard and rough, her pussy hole tightening in an almost crushing grip as she came, using his mouth and their kiss to muffle her cries, this act alone enough to send Dabi crashing in tidal waves inside her. “Hnng…f-fuck, yes…good fucking girl, Y/N…take all my fucking cum…” Dabi moaned and whimpered, panting like a dog.

After both of their orgasms subsided, Dabi’s cock finally threw in the towel and softened, Y/N curled into him. “That…might be the best roleplay sex we’ve had yet.” Y/N laughed breathily into his burned chest. Dabi chuckled back.

“We definitely have to do the dark romance shit again, for sure…fuck…I can’t beleive you’re into this shit…” Dabi groaned, burying his head into her shoulder, he genuinely enjoyed it, and he was not ashamed to admit it at all.