My Sister's Friend is Too Tempting
My name is Kim Yuon. I'm twenty years old.
I couldn't get it up during my first time with the girlfriend I started dating after getting into college.
"……Why is it like this?"
"I-I don't know either. Why won't it get hard?"
No matter how much my same-age girlfriend, Park Jiyeon, shook it, licked it, or sucked it, my cock refused to harden.
It just flopped around… like a boiled sausage.
"……Do you have another girl?"
"No! What are you talking about?"
"Then how come it won't get hard? Even when you're looking at my naked body, even when I'm sucking you off?"
"I don't know. I really don't!"
"You piece of trash……"
That day, Jiyeon cried, and I got dumped on the spot.
"Fuck……"
"Idiot lol. You had Park Jiyeon, the girl every guy wants to fuck, stripped naked in front of you and still couldn't do it, you fucking loser lololol."
"Shut the fuck up……"
My idiot friend Yoon Suhyeon kept teasing me. I called him because he always shows up when I need him, but I regretted it immediately.
Should've just drunk alone……
"Pfft…… Hey, can I crash at your place?"
"Why not your own studio?"
"It's too far……"
"Get lost, you idiot. I already bought the drinks, now you want me to let you sleep over too?"
With that, he hopped in a taxi and disappeared.
"What a disloyal bastard……"
I walked aimlessly for a while before deciding to just sleep at my family home. It was much closer than my studio anyway.
Beep beep beep, beep beep beep beep. Click—.
I opened the door as quietly as possible and closed it without a sound.
Tip-toeing inside, I washed my hands and feet in the bathroom right by the entrance, then slipped into my room across the hall, stripped, and collapsed onto the bed.
The alcohol hit me fast. My eyelids grew heavy.
Then the memory of failing with Jiyeon earlier snapped my eyes wide open again.
'Fuck.'
I gave my cock a rub.
It started getting hard right away.
'It works just fine now. Why the hell didn't it earlier? Shit.'
Maybe I should text her? Tell her it's working now and I don't know what happened before……
As I fumbled around for my phone, my hand brushed against something soft.
Soft… soft…?
"……???"
I groped around, trying to figure out what it was. Breasts. And bigger than Jiyeon's.
Someone was lying in my bed.
Thinking it was my sister, I lifted the blanket—only to find a girl I'd never seen before, wearing nothing but panties, fast asleep.
Her body was insanely hot…… Wait, what? This isn't my room?
……It is.
Who the fuck is this?
"W-who are you……?"
The silhouette under the blanket opened her eyes and looked at me. Her voice trembled as she asked. It was a delicate, feminine voice.

"……I was about to ask you the same thing. Who are you?"
"I-I'm Yoon Seona……"
"Yoon Seona?"
The silhouette nodded.
Never heard the name before.
Hold on. A girl around this age… could she be that bitch's friend?
"……Are you Kim Yuyoung's friend?"
"Yes……"
"Uh, how did you end up in my room? My parents hate it when we bring people over……"
"I heard they were on a trip…… Don't tell me you're Yuyoung's little brother?"
"Yeah. Kim Yuon."
"Ah…… She said her brother was living on his own and told me to use this room……"
"……"
This fucking bitch?
She'd been renting out my room like a love hotel while I was gone.
"But why are you…… naked?"
"I-I always sleep naked… It feels stuffy and uncomfortable otherwise……. I run hot, and after drinking tonight it got even worse…… Even though it's a friend's house, I ended up taking everything off."
"Ah."
My sister doesn't wear a bra at home either.
"……"
"……"
An awkward silence settled over the room.
It was the first time I'd ever shared a bed with someone other than my girlfriend while half-naked.
What the hell was I supposed to say?
"Did you…… drink?"
"Ah…… Yes. Can you smell it?"
"Yeah. Every time you breathe."
Yoon Seona let out a soft giggle.
"You must've had a lot?"
"Ah…… A bit with a friend."
"How much?"
"About four bottles, I think."
"Just the two of you? You can really drink."
"Normally two is my limit…… but today I had a lot because of some stuff."
"Stuff? Like what?"
"Haha. It's a little…… embarrassing to say."
"More embarrassing than the situation we're in right now?"
Our eyes met, and we both burst out laughing at the same time.
"You're right…… Maybe it isn't more embarrassing than this."
"Hehe, I'll listen. Tell me. I'm curious."
"Uh…… Well, I had a girlfriend……"
I told the naked girl I'd just met about getting dumped by Park Jiyeon.
"Ah. Because it wouldn't get hard……"
"Yeah…… It usually works fine, so I don't know why it didn't today…… Ha……"
"It's working just fine right now, though?"
Yoon Seona tapped my cock with her knee and laughed.
"Haha…… You shouldn't keep touching it like that."
"Why not?"
"It'll get mad and bite."
"Ahahaha, where?"
"Right here?"
I gave her ass a light squeeze. She put on a surprised expression, but a smile crept across her lips.
"Yuyoung's little brother, you're quite the player, huh?"
"Look who's talking. Seona noona seems like more of a player to me."
"Pfft, me?"
"Sleeping naked in your friend's little brother's bed? Isn't that what players do?"
"No, like I said earlier…… Ah!"
Grinning, I brought my mouth to her nipple.
"Hn…… Hah……!"
Soft moans slipped out between her increasingly rough breaths.
Smack, lick, suck.
"Mmn, hngh, ahng!"
"People outside will hear."
"Ah……!"
Yoon Seona quickly covered her mouth with her hand. When I started licking and sucking on her breasts again, muffled moans escaped anyway.
The dark room filled with the sound of our voices, growing hotter by the second.
When I licked the sweat gathered between her breasts, I felt her body twitch.
"Ha, haa…… haa……"
Figuring she was ready, I slid the hand that had been groping her ass into her panties. I kneaded her bare cheeks before moving forward. My fingers met something wet. Her pussy was already soaked. Her panties were drenched, and even the blanket beneath us was damp.
"……Did you cum?"
"Why would you ask something so embarrassing……"
Yoon Seona buried her face in the blanket, covering it with her hands. Her ears were probably bright red by now.
I chuckled softly and touched her down there.
Squelch, squelch…… slap, slap……
The lewd, wet sounds grew louder. The more I rubbed, the more fluid poured out.
At this rate, it was like she was pissing herself.
"Hn……! Ahngh! Haaang……"
Her body trembled violently. Her hips bucked, and her pussy clenched and unclenched.
Fluid that looked like piss spurted out in short bursts.
Orgasm.
This girl was incredibly sensitive.
"Haa…… haa……"
Yoon Seona rested her forehead against me as she caught her breath. I gently stroked her hair with my clean right hand.
"Did it feel good?"
"……Why would you ask that? So embarrassing."
Her flushed voice tickled my ears, and her ragged breathing teased my chest. My cock was already at its limit.
I took her hand and guided it to my erection.
"Do it for me too."
"……"
I held Yoon Seona's hand and moved it slowly. Even after I let go, her hand didn't stop.
My own breathing grew rough.
I felt like I was going to cum in my underwear. Wasting a load like that would be a shame, so I stood up and took them off. Then I knelt in front of her face and pressed my cock against her lips. She exhaled a warm breath and opened her mouth.
Slurp…… suck…… lick……
The wet sounds of her saliva mixed with my cock echoed through the room. My breathing grew ragged too.
Every time Yoon Seona's tongue brushed over my glans, an involuntary sigh escaped me.
She looked up at me with a faint smile. I grabbed her head and slowly rocked my hips back and forth.
"Mmph!"
Her eyes widened as she looked up at me.
Suck, suck.
The urge to cum hit me hard. I stopped moving for a moment, leaned down, and whispered in her ear.
"I'm about to cum……"
Yoon Seona kept sucking without stopping, her eyes locked on mine. Did that mean it was okay to finish in her mouth?
She swirled her tongue around the tip of my glans as if urging me on. Unable to hold back, I pumped thick ropes of cum straight into her mouth.
She waited patiently until I finished shaking, then licked my slit clean before pulling away.
"Ugh……"
"Ah, w-wait a second."
I quickly grabbed some tissues from the desk and handed them to her. Yoon Seona turned her head and spat my load into the tissues.
"Haa, haa, you came way too much."
"Did I……? Guess I had a lot built up…… Haha."
After tossing the tissues into the trash under her cute glare, I pulled a box of condoms from my bag. I'd already opened one earlier, but that one had gone to waste.
I tore open a new one, rolled it on, and turned back to Yoon Seona.
"……"
I carefully took both her arms and laid her down on the bed I'd been using alone ever since moving into this house.
Lying beneath me, Yoon Seona's eyes trembled as she looked up. I could see anticipation and a hint of worry flickering in her gaze.
Without hesitation, I positioned myself. I rubbed the condom-covered tip against her slit.
"Hah……!"
A moan escaped her. Yoon Seona belatedly covered her mouth.
Every time I rubbed my glans up and down, her body twitched. Her hips bucked. Her legs twisted together.
God, she was so fucking hot.
"Stop……"
"……Yes?"
"Hurry…… put it in……"
I thought she was telling me to stop.
She was just impatient.
I answered her silently with enthusiasm and thrust my hips forward. My cock parted her entrance and slid deep inside.
Yoon Seona's mouth fell open, and a rough breath burst out.
"Aah……"
Her walls squeezed and pushed back as if rejecting me. I pushed deeper, forcing my way in. I buried my cock to the hilt.
Just putting it in already felt like I was going to cum. Slowly, very slowly, I savored the feeling of her pussy as I pushed in.
"Hnn…… hah!"
The moment our hips met, we both exhaled sharply.
"Haa……"
"Huu……"
Watching her reactions, I started moving slowly.
Thrust…… thrust…… thrust……
Every time I moved, the wet sound of my cock coated in her fluids filled the room.
Creak—creak, creak—creak.
The old, worn-out bed joined in with its own cries.
"It's too loud. Want to get up for a second?"
"……Okay."
When I pulled out, Yoon Seona's body twitched. I helped her up by her slender back and had her lean against the desk, ass raised.
I tried entering from behind. Even just rubbing the tip against her made her ass twitch. Her legs didn't know what to do.
"Haa, haa……"
Yoon Seona glanced back at me. It looked like she was begging me to stop teasing and just put it in.
Grinning, I gave her exactly what she wanted.
Her entrance, already familiar with my cock once, gaped open eagerly. It was practically begging for me to hurry up.
I lined up the tip and pushed in smoothly.
"Hnngh……!"
Grabbing her waist, I started thrusting harder than before.
Thrust! …Thrust! …Thrust!
"Haa, haa…… hah! Ahng!"
"You're being too loud."
"Ah…… Yes…… hah……! Mmph……!"
At my words, Yoon Seona bit her lip hard, trying to hold back her moans.
Her long hair, damp with sweat and clinging to her back and waist, looked incredibly sexy. I gripped her slim waist and picked up the pace.
"Hah, hngh! Hngh!"
"……I'm gonna cum."
Yoon Seona nodded.
Thrust, thrust, thrust…… slam!
I came hard, filling the condom. The cum I'd been holding back rushed toward her womb but was stopped by the thin barrier.
I rocked my hips a few more times to squeeze out every last drop. At the same time, her body reached its peak too—her back arched, her ass trembled, and her pussy clenched tightly around my cock.
Squeeze, squeeze, squeeze, squeeze……
Yoon Seona's insides milked my cock over and over, as if trying to wring out whatever was left. Only after her trembling subsided did she finally release me. The condom caught on her entrance as my cock slipped out.
Her slender arms and legs shook before she finally collapsed onto the bed. She was still sitting on the condom that remained inside her.
I wrapped my arms around her from behind.
Yoon Seona leaned back against me, catching her breath.
"Haa, haa…… haaa……"
"Huu, huu…… huuu……"
As the night grew deeper, our breathing fell into sync.