Chapter Text
Does anyone know how to escape your annoying step-sister? Yujin had been asking herself that question for months now, with no clear solution in sight. Living with Wonyoung was like being stuck in an endless game of hide-and-seek where Yujin was always the one being found. No matter where she went, no matter how carefully she tried to carve out a moment of peace, Wonyoung was there—either blasting music, borrowing clothes without asking, or just invading her space in the most frustrating ways imaginable.
It wasn’t that Yujin hated her. It was more like… a persistent irritation that never went away. Every time she thought she had a moment to herself, Wonyoung would pop up, smiling innocently as if she hadn’t just ruined Yujin’s day for the hundredth time. Yujin had tried everything—locking her door, staying out late, even pretending to be asleep—but nothing worked. Wonyoung always found a way to annoy her, and Yujin was running out of options.
Even though they have their own separate rooms, Wonyoung would always find ways to make her feel miserable.
“Ah– fuck…”
That night, Yujin scrolled through her phone and came across a new Instagram post from her crush, Minju. She looked so beautiful and hot that Yujin suddenly felt warm and aroused. It was hard down there and she immediately seized the opportunity to have some fun time to herself. Of course, she didn’t forget to lock the door or else her annoying step sister would barge in somehow.
Stroking her hard cock, Yujin threw her head back, almost hitting the wall yet she was too high on lust to care about it. The sound of her hand around her shaft, moving up and down in a pace faster than her heartbeat, she felt it coming.
“M–minju, fuck yeah~” She closed her eyes tightly, moaning as she released, covering her hand and abs. Good thing she had rolled her shirt higher, or else her mom would have complained about the sticky laundry she’d have to deal with.
“Fuck, that was so good,” Yujin licked her lips, humming in satisfaction. The only light in the room came from her phone, which had Minju’s face on the screen, so she reached for it.
When she brought her phone back to her lap, her semi-hard cock resting contently on her stomach, she noticed a dark figure out of the corner of her eye. Her heart skipped a beat as she thought a ghost was watching her masturbate.
“AH!”
It was just Wonyoung, her step-sister, standing next to her bed, staring down at her with her cock visibly in sight. Yujin screamed even louder.
“WONYOUNG!” Yujin shouted at the girl, quickly pulling the blanket over her body. “How did you get in here?! I locked the door!”
“No, you didn’t,” Wonyoung shrugged nonchalantly, as if she hadn’t just watched her older step-sister shoot her loads into the air.
“What do you want?”
“There’s thunder.”
Yujin frowned. “And?”
“Let me sleep with you.”
“Are you crazy? Didn’t you see me earlier?!” Yujin raised her hands in frustration, gesturing to her body. This completely ruined her fun moment. All she wanted was to jerk off to Minju’s photo in peace since being with her was impossible.
“But I’m scared,” Wonyoung pouted, her hands playing with the string of her shorts. “Mom said if I’m scared, I can ask for your help.”
“Ugh!” Yujin rolled her eyes and scooted to the side, making a little space for the girl. “I can’t believe this. How old do you think you are? Get in!”
Wonyoung excitedly hopped on the bed, creating a sound from the springs. She pulled the blanket that Yujin was using, wanting to share, but the older girl immediately stopped her.
“Wait! I’m naked down there,” Yujin said, pointing to her boxers lying on the floor with her lips. She awkwardly chuckled, thinking Wonyoung would let her have the blanket to herself, but she was wrong.
Wonyoung got up and lazily grabbed the boxers instead, handing them back to Yujin and telling her to wear them before once again pulling the blanket over her body, making herself comfortable as they both lay on their sides.
Yujin huffed in annoyance. She hadn’t even gotten to clean herself, and there was no way she would put the boxers back on. “You are unbelievable.”
However, the unfortunate day didn’t end there. When Yujin said Wonyoung had no shame, she meant it literally. The girl didn’t even care that Yujin had nothing covering her lower part, and it was worse when Wonyoung slept with her back arched and her ass shoved right against Yujin’s cock.
A loud gasp escaped Yujin’s mouth when her length suddenly buried deep between Wonyoung’s asscheeks, waking her up in the middle of the night.
The thunder still rumbled, making it difficult for Yujin to call and wake Wonyoung. She couldn’t hold back anymore; the way Wonyoung slept while rotating her hips was something Yujin didn’t know she needed. But she couldn’t keep this going, or else she would do something unwilling.
“Wonyoung,” she called, whispering. But why was she whispering when she could just call her name normally and shake her to wake her up?
Maybe Yujin wanted this moment to last a little longer.
“Wonyoung,” she called again at the same volume, her hand resting on Wonyoung’s hip. That same hand unconsciously lifted Wonyoung’s shirt just enough to feel the girl’s warm skin against her palm. “Wonyoung.”
Yujin slightly lifted her head, peeking over Wonyoung’s hair and finding the girl sleeping soundly. She then hooked her finger under the waistband of Wonyoung’s shorts, pulling them down until she could see the firm ass, even in the dark.
“Fuck~” Yujin placed her entire palm on the hot buns, slightly spreading them apart and massaging the soft skin. She grabbed her now-hard cock and slid it between Wonyoung’s thighs. It felt so good that Yujin let out a deep sigh and moaned as she buried it deep until her front pressed against Wonyoung’s back.
“Oh yes.” The weather of the rainy days was too perfect for her to not do this. Their skin warmed each other so well that Yujin couldn’t help but wrap her arm around Wonyoung’s waist. At this point, she didn’t mind if the girl woke up to her slow humping of her thighs.
Her hands were getting naughty by themselves as Yujin brought them up to Wonyoung’s chest. She knew that the girl usually skipped wearing a bra at night since, last time, Yujin found her in the kitchen, walking around unaware of her jiggling tits and the protruding nipples poking against her thin shirt.
Now that her hands covered the full breasts, she kneaded them gently while still humping Wonyoung like a horny rabbit. Yujin would’ve imagined that Wonyoung was a bit busty, but she didn’t expect it to be better than that. Her breasts were so soft and pillowy, yet there was a hint of firmness that Yujin had no idea how to describe. She decided to play with them, rolling the nipples between her fingers.
“Fuck—this is so good~”
Wonyoung was hot; Yujin wouldn’t deny that. However, she had never thought about stripping the girl’s clothes off and burying her cock between her thighs.
Yujin used her skillful hand to unbutton Wonyoung’s silk pajamas, taking them off her body so she could put her lips on the bare skin. What a flawless body, she thought. From head to toe, Wonyoung was just perfect, and she hadn’t even mentioned her face yet.
Her annoying step-sister wasn’t so annoying after all, especially when she was sleeping, and even more so when she was naked.
What about her pussy?
Yujin once again peeked in, even though they were in a dark room. She reached down, her hand brushing against Wonyoung’s private part, and was surprised to find the girl soaking wet. The way Yujin’s middle finger slipped between Wonyoung’s pussy lips with ease said so much about how aroused she was.
“Fuck,” Yujin cursed under her breath, stroking her finger up and down. Despite the thunder rumbling in the background, she could still hear the slick sound of Wonyoung’s fluid.
Yujin pulled her cock out from between Wonyoung’s thighs before turning her to lie on her back. Her cock rested against Wonyoung’s warm skin as she proceeded to rub her fingers on the girl’s pussy.
How could she sleep soundly in this condition?
Yujin spread Wonyoung’s pussy lips, teasing her clit with her middle finger, and that’s when Wonyoung’s body jolted in surprise, yet the girl remained asleep.
“You’re so annoyingly hot, you know that?” Yujin asked the sleeping girl. She brushed her lips across Wonyoung’s skin, dragging them along her bosoms and lightly kissing the skin with her wet lips. “A clean-shaved pussy, and for what? Who do you want to use you like a slut?”
Trapping one of Wonyoung’s nipples between her lips, Yujin started sucking hungrily. She flicked the bud with her tongue while at the same time teasing the girl’s clit with her fingers, watching the slight frown on Wonyoung’s face.
“Hm,” Wonyoung moaned in her sleep, tilting her head to the side.
As Yujin picked up her pace, Wonyoung unconsciously caught her wrist. She opened her eyes, blinking away the sleepiness as she adjusted to the dark surroundings. Once she regained her senses, she turned and saw Yujin staring back at her.
Yujin’s hand was no longer on her pussy but rested on her thigh instead, kneading softly as if asking for a green light.
“Wonyoungie~”
“Since when did you call me that?”
Wonyoung could be part of a group of nonchalant people, as that was the first thing that came out of her mouth after Yujin dry humped her, rubbed her clit, and sucked her tits without consent. No screams, no pushing—just sleepily speaking.
“Well,” Yujin bit her lip, bringing her wet fingers to cup Wonyoung’s breast, briefly squeezing it. “You’re not as annoying as I thought.”
Wonyoung rolled her eyes, yet she still moaned at the contact Yujin made.
“You watched me masturbate and then asked to sleep next to me. I don’t know what you expect from that,” Yujin leaned in, brushing her lips against Wonyoung’s. She smiled, suddenly finding the girl more appealing than her crush, Minju, or maybe it was just that she was horny. “Are you a virgin?”
Wonyoung shyly shook her head.
“What’s your body count?”
An odd question to ask in this situation but Wonyoung answered.
“Two.”
“Ooh, Mom’s gonna be mad at you,” Yujin smirked, suddenly pulling herself up to settle in a position between Wonyoung’s legs. Her naughty hands didn’t stop touching and groping the girl, especially around her tits and pussy.
“What about you?” Wonyoung asked, wrapping her arms around Yujin as she leaned down toward her.
“I don’t know, maybe five,” Yujin replied, planting kisses on Wonyoung’s jaw, then down to her neck, adding some licks and bites while her hands groped her firm mounds. “About to be six.”
“Yujin~” Wonyoung moaned softly, and for some reason, it sounded better than anything Yujin had ever heard.
Yujin dragged her lips back to Wonyoung’s nipples, giving each one love and attention, sucking on them as if her life depended on it. She left marks and hickeys so that whoever Wonyoung’s partner was would see them and realize that someone else had been treating their girlfriend better.
“Yujin, please~”
“Impatient much?” Yujin sat up straight, seizing the moment to admire Wonyoung’s naked figure. She couldn’t believe this. Her cock stood at attention, ready for anything. She stroked it while maintaining eye contact with Wonyoung.
“Do you want this in your pussy?”
Wonyoung nodded eagerly, spreading her legs and using her fingers to part her drenched pussy, showing Yujin just how badly she wanted the older girl to fuck her into oblivion.
“Fuck~” Yujin’s eyes were hooded with lust as she watched Wonyoung touch herself while she spat on her hard cock, spreading the saliva around the tip. She gave it a few pumps and rubbed Wonyoung’s wet pussy, and they both moaned in pleasure. “I’m gonna fuck your tight pussy hard,”
“Yes, please!” Wonyoung moaned as her legs shot up right when Yujin positioned herself closer. Instantly, she wrapped her slender legs around the girl’s waist. “Fuck me, daddy,”
Yujin slightly flinched at the nickname, chuckling to herself as she was still new to it, but it made her even more aroused. She rubbed her cockhead against Wonyoung, creating a lustful sound along with their moans and heavy breathing. She stopped at the entrance, enjoying the view of the size difference; she was always proud of her huge shaft while Wonyoung’s pussy looked petite around it. Yujin wondered if she could do it in one stroke.
So she tried, slowly pushing in without pausing as she watched Wonyoung’s reaction.
“Yu–Yujin, hngh~” Wonyoung squeezed her tits together, biting her lip hard as the girth and length began to stretch her. “Yujin ah, ah… ah,” her back arched, lifting her slightly from the mattress. “Yu– ah…”
“Fuck, you’re so tight!” Yujin threw her head back, firmly holding onto Wonyoung to make sure she wasn’t getting away. She slipped further and further in until her balls buried against the girl’s ass. “Ah!” she moaned in pleasure, digging her nails into Wonyoung’s skin.
“Yujin~” Wonyoung couldn’t stop moaning her name, gasping with each thrust. She took a deep breath and sighed when Yujin was finally deep inside her.
Knowing that this was their first time together, Yujin leaned down for a heated, passionate kiss. She captured Wonyoung’s lips, tilting her head as her tongue slipped in and sloppily rubbed against Wonyoung’s. The girl’s moans vibrated against her, urging her to deepen the kiss wildly.
Pulling away, Yujin buried her face in Wonyoung’s neck, biting down on the skin. “Fuck, Wonyoung… why haven’t we tried… this before, ah… so… ti–ight!”
“Yujin~ hmm… please, move,” Wonyoung pleaded, her eyes teary, but it was the tears of happiness. It wouldn’t be every day that she could get a thick cock inside her tight pussy, right? Well, now it seemed like it was going to be every day.
Yujin moved her hips, shallowly fucking the girl to adjust their positions better. It didn’t take her long before she lifted one of Wonyoung’s legs and put it over her shoulder, starting to quicken her pace. It got faster and faster, just like how Wonyoung’s moans grew louder and louder.
“Yujin ah… ah—ah! Hngh! Yujin! Yes, yes, harder!” Wonyoung had her tongue out and her eyes crossed. The huge cock was driving her crazy, and she needed every inch of it—especially Yujin’s—because the older girl had no idea that she had been waiting for this moment to happen.
Fantasizing about getting railed by her step-sister was something Wonyoung had found herself doing ever since she first stepped into the house and saw the hot girl welcoming her and her mother into the new family. The reason she annoyed Yujin was that she wanted this to happen, but Yujin was too oblivious to notice that Wonyoung had to act nonchalant around her.
Here she was, her pussy being pounded by her dream girl.
Phlop phlop phlop.
Yujin didn’t hold back; she went all out, slamming her cock into that tight pussy. The sound filled the room, and they were glad their parents’ bedroom was downstairs, the rain and thunder seemingly covering the clapping noises. The bed shook beneath them.
She held onto Wonyoung, groaning in pleasure as sweat rolled down her face. There was no better feeling than this. Wonyoung’s pussy was so tight and hot that Yujin felt like bursting, wanting to load her semen into her womb right at that moment.
“Fuck– Wonyoung–“ Yujin bit her lip, reaching down to squeeze the girl’s perfect, round tits. Then, she brought her hand lower, circling Wonyoung’s clit with her fingers while her cock worked in and out, drilling into that hot pussy.
“I’m ah– I’m coming –“ Wonyoung moaned, clawing at Yujin’s back, whining so loud it nearly drowned out their fucking sounds. She stretched her legs out, hanging them in the air as Yujin railed her harder and faster. She could feel it, tightening her walls around Yujin like there was no tomorrow, screaming her name. “Yujin– hngh!”
“Cum for me,” Yujin slapped one of Wonyoung’s tits, watching it jiggle and immediately tugging on her nipple. Her hips moved faster as her thighs hit Wonyoung’s ass.
Thwap thwap thwap.
“Yujin! Hah! Hah! Ahngh~ I’m–“ Wonyoung wrapped her arms around Yujin tighter, screaming her name as her legs trembled uncontrollably against the girl. She reached her climax, leaving her breathless as her head dropped back onto the pillow. It felt so good, but she couldn’t stop shaking.
Yujin gently held her before pulling out slowly. “Ah, fuck~” The string of Wonyoung’s fluids stretched from Yujin’s tip. She automatically cupped the hot, sensitive pussy, looking up to see Wonyoung’s reaction. Rubbing in circles, Yujin slowly slipped her fingers in.
“Yujin ah!”
Yujin turned their bodies to lie sideways, just like their position before going to bed earlier. She thrusted her fingers in while her wet tongue trailed over Wonyoung’s shoulder.
“Do you like it, Wonyoung ah?” Yujin slipped four fingers in, curling and rotating them inside. “Do you like getting fucked by your own step–sister, you whore?”
“Hngh~ yes!” Wonyoung shut her eyes tight, raising her leg in the air as her hand reached back to hold onto Yujin. “Ye–yes~ fuck, Yujin ah…”
“Look at you… soaking wet.”
Slap . Yujin gave the red, sensitive pussy one good slap before thrusting her still-hard cock back in. She hadn’t gotten her release yet, and without hesitation, she slid it back in, still amazed by the tightness. “Fuck~ I fucking love your pussy~”
fwap fwap fwap
“Yujin~ hmm, yes~ yes… harder, baby…”
When Yujin pinched her clit, Wonyoung’s eyes crossed, eliciting a loud moan as she grabbed onto Yujin’s thigh, digging her nails into the skin.
“I’m– hah~ I’m close, baby…” Yujin threw her head back, fucking Wonyoung until she felt the knot tighten and her balls tense up.
squelch squelch squelch
Yujin hit the right spot, causing Wonyoung to tremble like an overstimulated rabbit. When the younger girl clenched around her, Yujin groaned.
“Ah!” Yujin quickly pulled out, kneeling upright as she immediately stroked her wet cock, positioning it toward Wonyoung’s upper body. “Fuck yes~”
Amazed by the size, Wonyoung couldn’t help but run her hand over Yujin’s thigh, watching her jerk herself off. It was so hot that she could feel her pussy getting even wetter, clenching at the emptiness. She wanted Yujin inside her all the time.
“Do you… wanna touch it?” Yujin asked, breathless.
Wonyoung immediately sat up in front of her. She wrapped her slender fingers around Yujin’s cock, moaning at the touch. Her hand looked petite around its girth, and she wondered if Yujin was the biggest in town.
“Like this?” Wonyoung asked cutely, though she knew what she was doing. Her hand stroked back and forth, her thumb running along the veins. She licked her lips—if Yujin gave her permission to suck it, she would have been gagging on it right now.
“Yes… fuck, faster… I need to come…”
Yujin swiped away strands of hair sticking to Wonyoung’s face, gently wiping the girl’s sweat as she let her tongue out, ready to consume Yujin’s load. “You’re so… fuck…”
Fap fap fap
White hot semen shot up, splattering over Wonyoung’s flawless face and tits. It was sticky, and Wonyoung eagerly licked up every drop she could see. “That’s a lot! Hmm~ so good…”
Yujin’s face flushed red. She wrapped her hand around the back of Wonyoung’s neck while the girl busied herself licking Yujin’s cockhead clean.
“Come here and kiss me,” Yujin commanded, pulling her by the chin. They locked into another hot kiss, tongues clashing as Wonyoung sucked on Yujin’s, making a slurping sound. Yujin’s hand cupped Wonyoung’s tits, squeezing them as they kissed.
“Hmm…”
smooch smooch smooch
When they pulled away, a string of saliva still connected them. They smiled.
Wonyoung grabbed Yujin’s hand, bringing her fingers to the semen stuck on her face, then sucked the fingers clean.
“You’re driving me crazy,” Yujin muttered softly.
Releasing the fingers with a pop, Wonyoung smirked. “Am I still annoying to you?”
They pressed their sweaty foreheads together, smiling at each other. “Depends…”
“Depends on what?”
Wonyoung yelped when Yujin suddenly flipped her over, positioning her on all fours. Yujin slapped her limp cock against Wonyoung’s ass, humping it between her buns.
“We still have hours to find out.”
And more positions to try out.