The Line
"What are you doing?"
"……."
There's a saying that excess is as bad as deficiency. In other words, don't get too greedy.
Because if you keep groping her chest when she isn't waking up, you can get caught and completely fucked.
"I said, what are you doing."
No words came out.
It had been pure self-indulgence. The lazy thought that since we were siblings who had already done that sort of thing, and since the mood today had been good, it would be fine. That thought had overlapped with instinct and landed us right here.
"Spit it out. What are you doing."
A chill ran through me like I was getting chewed out by a senior. The truly terrifying kind—the kind with no emotion in the voice at all.
"I'm sorry."
I pulled my hand off her chest and lowered it. My heart was still hammering so hard my head felt light.
"So. What. Are. You. Doing."
"……Chest."
"I can't hear you. Louder."
"……I was touching your chest."
"You were touching your sister's chest."
"……Haa."
Sis let out a deep sigh. She looked straight into my eyes, making no effort to hide how furious she was.
Terrifying.
This was the first time she had scolded me since middle school.
"Ji-chul."
"Yeah."
"Did you… want to touch my chest that badly?"
"……."
"Answer me."
"……Yeah."
"Huu…."
Sis sat up. I couldn't just keep lying there, so I sat up with her.
"Here."
"Huh…?"
"You said you wanted to touch them. My chest."
She took my wrist and guided it toward her breast. The empty sensation filled out again, soft and full. But the atmosphere hadn't changed. If anything, I was only more conscious of her eyes on me.
"I'm sorry… for real…."
"……Really?"
I pulled my hand away, dropped to my knees, and placed both hands on top of them. I put on the most apologetic face I could manage and offered every gesture of remorse I knew. No matter how wrong I had been, I didn't want our relationship to end like this. I didn't want her to leave for some other world. I poured everything I had into making her feel that.
"Pfft."
"…?"
"Hahaha…! You're so cute."
"…About what."
Sis suddenly burst out laughing. She ruffled my hair and pulled my face into her chest. My vision filled with something elastic and soft.
"I'm not mad."
"…Really?"
"Of course not. If I were actually angry, I would've called the cops and then some."
"Yeah, well…."
"Was our little Cheol scared? Isn't that just too adorable?"
"Don't tease me…."
No, the mood, the expression—everything had been terrifying. It felt like middle-school PTSD flaring up.
"You're really not mad…?"
"I really mean it. I was just surprised. Thinking, so you wanted to touch them that badly…."
"……."
Between her pale thighs where she sat casually, especially the plump rise between the pink panties, kept snagging my eyes. I glanced back and forth between the panties and her chest, reading her face.
"Then… can I touch them?"
"……You want to?"
"Yeah."
This time I answered without hesitation. Sis looked away and spoke, hesitant.
"……Here."
She took my hand again and set it on her breast. Whether she truly meant to let me or not, she let go of my hand after that—as if to say the rest was up to me.
"……."
Watching her embarrassed face, I caressed her chest as gently as I could. I tried to look only at her face, but my gaze inevitably drifted down to her breasts and lower.
"Haa… huu…."
Soft, tense little sounds escaped both of us. The breasts that wouldn't fit in one hand grew more familiar the more I touched them.
"Eut…."
The pressure slowly pushed her back against the wall. With nowhere left to go, I pressed into her chest as if kneading it against the wall itself.
"Heok…."
"Cheol…?"
"Ah—yeah. I haven't lost it."
Her voice barely pulled me back. I had almost been swallowed whole by her breasts.
"Sorry. Did that hurt?"
"It didn't hurt… I was just wondering if this is the face you make at times like this."
"What kind of face was I making?"
"Like you were about to devour me right then and there?"
"……."
Was my face really that scary? And it wasn't a devouring face—more like a face that wanted to fuck her. Either way, she was tense enough to stop me.
"W-wait a second… it's rubbing because of the clothes…."
With a shy look, she started pulling off her T-shirt. Maybe because Mom wasn't home, she took it all the way off this time. The way her breasts had been compressed under the fabric had already been hot, but seeing her bare was far worse. The contrast between those conquering weapons of a chest and her slender waist was pure art.
"Huu…."
"Should I take mine off too…?"
"No. It's fine. Or… um…."
Now that she was bare herself, she seemed flustered and embarrassed.
"Do you… want to?"
"……Sure, why not."
She had stripped. I couldn't stay dressed. I didn't know how my body would look to her, but last time she had casually called me pretty muscular, so it shouldn't matter much.
"Can I touch them now…?"
"……Yeah."
I wiped the sweat from my palms on my knees and set my hands on her breasts again. The feeling of touching that undiminished chest was exactly the same as before. In this dizzying situation, it was identical to the time I had groped her in secret from Mom. The fact that Mom wasn't here now, that I could touch them freely, made my heart race.
"Huu…."
"Haa…."
Our shallow breaths overlapped as I squeezed her breasts firmly. My fingers sank into them like soft mud. Beyond simple kneading, I rolled them, pressed and released, working them the way I had before so my hands could relearn the shape.
"Aren't you staring at my chest a little too much…?"
"……."
At her words I pulled my hands away, and her breasts quivered up and down.
"Sorry…."
But when I looked at her face instead, it was almost worse. Flushed deep red with shame, it was unbearable.
"Heut…!"
My face moved toward her chest on its own, toward her nipples. Those pink tips that looked made to be tormented met my lips for the first time.
"Oomph… chuuup… haa… ha-up."
"Haa… eut…."
Her moans grew louder as her nipples were relentlessly worked over.
"Eut!"
I caught one between my lips, tugged, and let go; a lewd little sound answered me.
"W-what are you looking at…."
Our eyes met in that moment.
"So you make sounds like that too, sis."
"Because you keep touching me so dirty…."
Saying that with a face like hers was ridiculously cute.
"Ha-eu…."
I sucked her nipple again and tormented her breast. The only place she had allowed was her chest, so I didn't touch anywhere else. I wouldn't until she said so.
"……."
When I finally lifted my head from the mindless sucking and licking, our eyes met again. Her pupils were slightly unfocused; her lips were bitten raw from trying not to moan, glistening with saliva and catching a soft light.
"Sis."
"Yeah…?"
"Um……."
I hadn't been interested at all before. Suddenly I was. Come to think of it, a kiss was always the first step up the adult staircase. I had never even stood at the foot of that staircase.
"Yeah…? Say it."
"You're not going to get mad…?"
"When have I… ever gotten mad."
"Fair…."
The more we talked, the closer the distance grew. She seemed to sense what I wanted; her lips trembled. Soon our faces were level, so close our noses almost brushed. One turn of the head and our mouths would meet.
"Can I?"
"…Do you think you can?"
"……No."
We had already crossed so many lines, but what we were doing now was something siblings should never do. We both knew it, and still we had touched each other's chests, touched my cock. Confirming it again now only meant she was uneasy too—because once we did this, we could never go back to being the close brother and sister we used to be.
Even so, I wanted it.
I wanted to kiss her.
"What… then why…."
"I just… want to…."
"Really…?"
"……."
"If any girl would do… I… could introduce you to a friend. Someone your type."
She said it in a small voice, as if she wasn't sure. I had seen her friends plenty of times—casually, and a lot at the funeral. There had been people who looked like my type, just like she said. Still I stayed silent. Because it felt like it really had to be her.
"Or… do you… really… have to have me?"
"……Yeah."
"Why…?"
"Just because. Because you're my sis. Because you're pretty."
"There are plenty of girls prettier than me."
She cupped both sides of my face with a faintly jealous look.
"But you understand me. Even when I do stuff like this."
"……Because we're family."
"……It's my first time."
"Then figure it out."
"Okay."
The moment our lips met, I closed my eyes and focused on the sensation. Like in the movies, I lightly bit her upper lip and released it; each time left a lingering aftertaste. She matched my movements, slowly sharing saliva through our mouths. The strange sensation of having my lip bitten echoed through my head.
So this was why people said kissing was intoxicating.
It was on a completely different level from the secret times.
"Huu…."
"……."
When our lips parted, a thin strand of saliva stretched and fell onto her chest.
"Kyaak…!"
I licked that saliva up with my tongue and pushed her down.
"You okay…?"
"Yeah… just startled."
"……Good."
Under me, she averted her eyes, looking like she was about to be taken. We breathed hard against each other and kissed again. It no longer stopped at kissing. My fingers tormented her stiff nipples while I pressed our bodies tighter together.
"J-Ji-chul, wait…!"
"Sis…!"
"Heut!"
Before I knew it, my cock was prodding the mound between her legs. Even with the panties in the way, that unknown territory was warm and damp. I sealed her moans with my mouth as we rolled across the bed. Even the shy sis began to move more actively.
"Haa… ha-eua…."
"Sis…."
"Cheol…."
She climbed on top of me and started rolling her hips. With only fabric between us, our sexes rubbed together, producing wetness. I wrapped my arms around her waist and desperately thrust up to meet her. The two eager sexes showed no sign of stopping their pursuit of pleasure. The precum leaking freely didn't matter at all. What mattered was that the sis right in front of me was grinding her hips in heat.
"Heut…!"
I flipped her again and took the upper hand. Her mouth wouldn't stay closed. The only clothing left—the last scrap of fabric—was one piece.
"W-wait…."
"Why."
"Are you really going to take them off?"
"…Is that not okay?"
"Mmm… well…."
She seemed to hesitate. We had truly come to the final, final edge. But a last scrap of pride remained—the pride of still being able to call ourselves siblings.
"Then since I've done everything so far, I'll leave it to you."
"Leave what…?"
"If you want to, take them off yourself."
"……."
I showed her my cock standing straight up, tenting my underwear like it was about to tear through. My will was fully ready, and my cock said so for me.
"Hu, huu…."
She took a deep breath and avoided my eyes. Her hand hovered near the panties for a long time, going back and forth. Meanwhile she crossed her legs; the sound of thighs meeting and the sticky wetness reached my ears.
"I'm saving myself for marriage."
"……Can't we just count this as married?"
"Do you think that makes any sense?"
"No."
I took her hand as I spoke.
"I… can really take responsibility for you."
"Idiot. There are plenty of other girls, I told you. I can introduce—"
"I like you."
"……."
"You're my first love, you know that?"
"F-first love, what are you…."
"It's true."
"Huu…."
How many times had she sighed today? At this rate the ground was going to cave in.
"This is why blood doesn't lie…."
"What are you talking about…."
"I kept… seeing you as a man too."
"……Really?"
"But siblings aren't supposed to, so I gave up… then after Dad passed… and lately you've been taking such good care of me…."
As she said it, she finally started sliding the panties down.
"……And it ended up like this."
At last it came into view—the unknown territory the panties had hidden. Sis's pink pussy, which I had never seen in my life, was parted prettily open.