no thoughts just atsu-nii sneaking into his little sister’s room at night just planning to jack off, but he just can’t control himself<3
somno, incest, noncon, manipulation, breeding, fem virgin! reader
word count: 1,293
Atsumu tried his best to stay quiet as he slowly pushed open the door to your bedroom. Everyone in the house was asleep, he made sure, and it was nearing 3 am. When he finally stepped inside and had closed the door behind him he was quick to get what he wanted. Unbeknownst to you, it had become a nightly ritual for him to sneak into your bedroom and get himself off at the sight of your resting figure.
He was especially needy tonight as he wrapped his fingers around his hard cock. Usually he wouldn’t do this, but the felt brave tonight. He tiptoed closer to your bed and slowly lifted up your covers to reveal your still body. His eyes widened at the sight of your ass facing him, your shirt had hiked up to your waist and your lace-covered ass was left exposed. Atsumu bit his lip as his hand subconsciously began to pump faster. He couldn’t help himself when his hand started to wander around your body, down the curve of your waist to palming your ass. He knew this was wrong, he knew this made him a pervert, but he couldn’t hold back anymore. He sat down beside you on the bed and slowly layed onto his side, your back landing flat against his chest. He knew you would wake up eventually s he made it a point to be quick.
Within seconds your panties were on the floor and his fingers were teasing your entrance, when he felt you begin to stir against him he pressed one finger into your wet cunny, you were surprisingly tight and that’s when Atsumu realized you were probably a virgin. To his knowledge you’d never had a boyfriend and you weren’t a party animal. His dick throbbed at the thought of being your first. He pumped his finger inside you faster and added a second one, after a minute of this you finally woke up. You didn’t comprehend what was happening at first, and you didn’t know who’s chest your back was pressed up against, you rubbed your eyes but before you could look over your shoulder you felt his fingers pressing into your g spot. You couldn’t hold back the moan that fell from your lips but you were scared, tears sprung to your eyes and Atsumu placed his hand over your mouth. “Shhh don’t wanna wake up ‘samu do ya?” Your eyes went wide and your tears began to flow. “Stop! What are you-” your words were cut short by his fingers roughly entering your mouth. “I said shush. You don’t want ‘samu to see you like this do ya? Soaking wet for your big brother?” “Please- I don’t want this-” your words came out muffled around his fingers “oh really? The way your little pussy’s swallowing my fingers says otherwise kitten.” By now your tears were dripping off your face and your cries mixed with the moans you couldn’t bite back. “You’re a virgin aren’t ya?” Atsumu chuckled. You pried at his hand to try to remove it from your mouth but it wouldn’t budge, so you bit down hard onto his fingers. “Agh shit-” Atsumu hissed, his eyes clouded over with an even darker lust and you trembled in his arms. A harsh slap landed on your cheek and you let out a choked gasp. “What a little brat” Atsumu spat. “Please stop Atsumu I won’t tell anyone I swear! Just please don’t do this I don’t want this” not that he’d admit it, but your desperate pleas only made him hornier.
Your small delicate body couldn’t possibly fend him off so you were helpless when he flipped you onto your back and held your flailing arms down above your head by your wrists. He ignored your flailing limbs and used his free hand to pull out his throbbing dick. The sight of it made your eyes widen and flailing pause “you can’t- you- you’re too big atsumu it won’t-” “awww don’t worry sweetheart, I’ll be gentle with ya” your warm cheeks were once again met with fresh tears and your protests grew more and more desperate. You didn’t want your family to walk in, you couldn’t possibly handle the humiliation but you didn’t want this. His tip prodded at your entrance and you gasped. Slowly he pushed the tip inside you, it was already too much and you were writhing in pain. “Does it really hurt already y/n? Awww but don’t you wanna take it all? Make your big brother feel good?” You shook your head furiously and cried out for him to stop but he pushed deeper until you felt like you could black out. By the time he was half way in, the coil in your stomach felt like it could snap any second. Atsumu could tell by the way your pussy was clenching around him, making him groan. “You gonna cum already? For someone saying they didn’t want this you sure seem to be enjoying it. Filthy slut.” The last two words were accompanied by a slap to your thigh. You yelped and tried to hold yourself together, but when Atsumu began to rub his thumb vigorously against your puffy clit you couldn’t hold back. Moans and cries tumbled from your lips as your orgasm washed over you, the pain and pleasure was overwhelming and your small body shook in ecstasy. Your pussy gushed against Atsumu’s cock and he took this time to push himself all the way inside, his tip prodding at your cervix.
You almost screamed as you felt his veins slide against your inner walls. “Stop!” You yelled rather loudly. Atsumu wrapped his big calloused hand around your throat and squeezed. You were left desperately gasping for air as he began to thrust in and out of you, your body unable to handle the pain. He loosened his grip on your throat as your body began to go slightly limp and allowed you to get some air. While you coughed and squeezed onto his arm for dear life he continued to thrust inside you and lifted up your shirt. Atsumu leaned down and took your nipple into his mouth. Swirling his tongue around the hardened bud and occasionally biting down softly. He raised his head to move onto the other breast. “Your tits are so fucking perfect y/n. Can’t believe I held back this long.” All you could do was cry in response. It felt like an eternity before his hips finally began to stutter and his pace became sloppy. “Please don’t cum inside me” you managed to get out. “Aww but don’t you want big brothers cum? You’re really hurting my feelings y/n I wanna fill you up, make sure you know who you belong to.” You used what little energy you had left to kick your legs around and push and scratch at his chest, pleading with him not to cum inside, but he wouldn’t listen. Atsumu let out a loud groan as he slammed hard inside you, making sure to milk his cock well and get all his seed inside you.
You just fell limp and sobbed as he pulled out, sitting back to watch his cum slowly drip out of your abused cunt. Atsumu didn’t waste time in pulling his pants back up and leaving a sweet kiss on your tear stained cheek. “Don’t tell anyone about this princess. Ya wouldn’t want them to hear about how much of a little pervert you are right? Cumming all over yer big brothers cock? Letting him cum inside you?” You whimpered pathetically and shook your head. “That’s a good girl.” You watched as Atsumu slowly left your bedroom, trembling at the pain your poor cunny was enduring.
a/n: barely proofread lol but this is my first scenario i hope you guys like it 🥺