Fingers on Warm Flesh – My Sister's Body and the System's First Claim
The soft flesh pressed against my fingertips felt incredibly vivid.
The contact between skin and skin was far more intense than I had expected.
Her skin was unnaturally smooth, and when I pressed my fingers in, they sank deep into the yielding gaps.
The heavy weight of her full breasts pressed into my palm.
It was like gripping a massive jelly that squished and crumbled yet somehow held a strange resilience.
Among that softness, the nipple.
Or, as it’s more commonly called, the areola.
It was slightly larger than mine.
About the size of my pinky finger.
I shaped my thumb and index finger into a pincer and gently pinched it.
"Uuhk..."
Because it was such a sensitive spot, a strange cry slipped out from my sister’s lips.
Her entire body, which had been rigid with tension, lost its center and unconsciously leaned into my chest.
Ah, don’t laugh.
The situation had no atmosphere to begin with, but the sight of my sister flailing around like an overturned frog was so ridiculous I nearly burst into laughter.
"W-wait a second...! S-Seojin ah! A-ah...!"
I ignored her pleas and rolled her shirt up to the collarbone.
It was annoying because it was cumbersome to lift while she was still moving underneath.
Struggling to find a way to proceed, my sister stiffened her spine again and pushed herself slightly away from me.
During that moment, the palm holding her felt a little damp.
Sweat.
It might have been sweat from embarrassment and nervousness.
From me, from her, or both?
Any of them would have been fine.
"It’s uncomfortable to touch."
"B-but... um... j-just a little..."
"But why?"
This was ridiculous.
Was touching her normal now?
"It’s not that cold."
I pushed the nipple between my fingers down firmly while pulling it forward.
"Hahwk...!"
My sister’s body stiffened again.
She probably wasn’t even going to answer properly anyway.
She always stumbled over words, and often couldn’t finish her sentences, just swallowing them whole.
"U-u... h-ah... h-ah... uuu..."
Finally giving up, only weak moans leaked out intermittently.
It wasn’t a voice of pleasure; it was someone desperately holding back screams while being forced to endure the pressure.
It might have been the sheer horror of being molested by her little brother.
I didn’t really care.
Even if I learned every erotic technique from watching videos, I doubt it would ever be as natural as this.
Even if I roughly understood the theory, seeing it in real life would be enough.
Every shut-in keyboard warrior who enjoys sports would basically be like national-team athletes.
Plus, porn was different from real life.
I dropped any clumsy touching techniques and decided to focus entirely on the real body of the woman who had just met my first skin-to-skin contact.
'... Her breasts are really big. This fatty.'
"Uuuuh...!"
I had never once seen my sister as a woman.
I wasn’t going to say I never did, but it was just unfamiliarity from the gender difference, not any sexual attraction.
From childhood onward, she had simply been a pitiful being living under the same roof as me.
She was so meek and submissive that even a slight wrong word didn’t earn any retaliation.
I had my own preferences.
I liked slim builds over plump ones, and pretty faces over ugly ones.
Because I had spent my whole life looking at a half-Western sister, my ideal type was actually an elegant East Asian woman.
It was still true even now that I was older.
A sudden uninvited guest.
Exactly that feeling.
If not for that sudden realization, I wouldn’t have glanced at her.
This weird system.
Why not do something?
Her fragile personality that I had observed for a long time.
The deeply rooted power dynamic between us.
And this special closed-off situation of living together in a narrow one-room apartment.
All of it combined, and the hesitation felt surprisingly absent.
Even though I had always looked down on her as a pig-like girl, her arousal should have been impossible, but it was nothing but my own delusion.
Men’s bodies are surprisingly honest and straightforward.
So, my decision was followed by immediate action.
"Hey, when are you going to leave the house?"
"E-eh...?"
"Don’t pretend you don’t know. Aren’t you even looking for a job?"
"Ahh... t-that..."
My left hand, stroking her belly while sliding downward.
Her visible shock at my sudden, irrelevant question was clear.
After all, no brother would ever say something like that while squeezing his own sister’s chest.
"How long are you going to live off me as a NEET? Huh? Answer me."
"......"
"You make me angry."
I deliberately laced my voice with sharp disgust.
My sister shrank her shoulders at my criticism, looking like she had been hit by a lightning-fast gaslighting tactic, but the effect was undeniable.
"I-I’m sorry..."
Her lower body was still in panties.
She hadn’t removed her pants, so she was only covered by a blanket.
I stroked her smooth thighs, lowered my head, and brought my lips close to her ear.
Naturally, my breath tickled her earlobe.
"Don’t you masturbate when I’m not home?"
"..., y-yeah. ..., y-yeah. A-ah... eeh... ahahaha, no. I-I didn’t...!"
"Don’t lie."
I thrust my fingers straight into her panties.
A handful of coarse pubic hair brushed against my fingertips.
"Hiiik!"
I was telling the truth.
My sister had masturbated a few days ago.
At her age, she could certainly do it.
She didn’t do it often, but she did do it.
I recited the records exactly as they appeared in her status window.
"You did it alone while I was away the day before. Right?"
"..., n-no. I-I didn’t do that."
"I know everything, so stop getting angry."
"Uuu..."
"You did it while lying in bed. While looking at your phone. Correct?"
Perhaps from shame, her ear against my lips turned hot.
I slowly stroked the bush covered in rough hair.
The texture of the pubic hair touching my fingertips was coarse.
I whispered even lower.
"What kind of video were you watching?"
"..., no."
"No, what no? You love it when I suck you off. A woman licking like a dog. Right?"
"I-I don’t..."
"Whenever I’m pent up, I see you drooling with excitement. You crazy pervert."
"I saw you crying while you peed yourself too."
"Isn’t this a real pervert?"
I felt her body stiffen in my arms.
"Eh, eh?"
Her status window showed everything.
It detailed exactly when, where, what, and how she masturbated.
The genre she mostly indulged in was usually women receiving service from men.
Women flattering men, kneeling and submitting like slaves.
Having lived her life in constant repression, perhaps her brain had been thoroughly corrupted by severe abuse, and she built walls that pushed her even deeper into the abyss.
Of course, that wasn’t definitive.
Just like how not every netorare lover actually wants to be the victim.
Some might simply get excited from watching the thrill of it.
So what?
"Was it good?"
I squeezed her hair tightly.
"A-ah... it hurts...!"
"While I was working, you took it easy and rubbed your pussy. It felt good, didn’t it?"
"..., u-uu..."
"Because my little brother earns money and feeds me, the world feels easy? Because I stayed silent, I don’t look pathetic? Right?"
"A-no. I-I just..."
"..., why suddenly? Huh?"
"......"
"It’s pathetic. Thinking about it, it really is."
"......"
"Why do some people work like dogs and still live like this?"
"I-I..."
My cold words must have hurt her.
My sister couldn’t finish her sentence and started sobbing.
Out in the world I couldn’t speak a single word to a woman, yet at home I was the shut-in yeobo.
An inner sense of self-loathing and disgust flashed through me, but soon I just thought, "Well, whatever."
"Hey, take off your panties and lie down with your legs spread."
"Eh...?"
"Take them off, spread them, and lie."
"......"
My sister’s back trembled faintly against my chest.
"You know what? After you came, I couldn’t even masturbate properly. Right? No."
"U..."
"You already knew, right? The things I do in the bathroom. If you didn’t know, you wouldn’t be saying that, you bastard."
"T-that..."
Even though her arousal was weak, she still masturbated.
What about me, who boasted of having plenty of vitality in my twenties?
Since my sister had crawled into this narrow room, she had to turn on the water in the bathroom or play loud music on her phone and keep her guard up to masturbate.
I couldn’t kick her out for masturbating, and it wasn’t something I could openly declare to do either.
Whether weekday or weekend, working day or rest day, she had to hide like a ghost and stay cooped up in the house.
Previously, I would let her do whatever she wanted comfortably every day.
Now she had to sneak and barely finish it like a mouse.
Because her personal space had been completely taken away, that too became one of the cruel stresses caused by her very existence.
One of the reasons I hungered for her was exactly that.
"Does that make sense? Is masturbating while watching the landlord’s eyes as a tenant reasonable? Some people sleep comfortably while scratching their pussy on the money my brother earns. How fair is that?"
"I-I’m sorry..."
"Sorry? Is that real?"
"I-I made a mistake."
Her voice trembled as if she was about to cry.
My sister only repeated that she was sorry without any proper rebuttal.
"Then do it."
"..., e-eh?"
"I said do it."
"I can’t earn money, I just stay home, and I only masturbate. Why do you have to feed me, a useless woman? Then at least help me handle my brother’s sexual urges. Right?"
"......"
"I don’t have any experience anyway. I’ll do it."
She must have anticipated my next line.
She shrank again.
"If you understood, take off your panties and lie down. Then spread your legs."
"......"
"Don’t want to? If you don’t, get out."
"......"
"Do whatever you want. I don’t care."
"......"
How much time had passed?
My sister stood up.
"..., I-I..."
"Hurry up."
"......"
My sister slowly moved away from me.
After a moment of hesitation, she finally bent down and began removing something.
A silhouette moving restlessly in the darkness.
Adapted eyes that were used to the faint light filtering through the blackout curtains.
My sister’s every movement was faintly visible.
Finally, after removing her underwear, she sat down timidly on the bed, then lay back.
"Spread your legs too."
"......"
No answer came.
In its place, her neatly parted thighs.
"..., I’ll do it right now."
I didn’t know anything about foreplay or anything like that.
I just wanted to start thrusting.
Like my sister, I usually slept in just panties, so I roughly threw off the cumbersome fabric and pushed my body into the space between her open thighs.
"..., uuh."
Before positioning, I lightly brushed my fingertips across her slit.
A slippery moisture coated my fingertips, but whether it was sweat from tension or the fluid I had only heard about, I couldn’t tell.
I couldn’t see it in the dark.
I could only vaguely sense the shape of her pussy.
The thick mound was unbelievably soft.
Smoother than her breasts.
Because she had a lot of fat, perhaps.
I pressed one hand firmly on her thick thigh to hold it in place, and used the other to find the entrance.
Was that protruding part the clitoris?
So this was it.
"......"
I carefully swept across the complex, winding folds and finally felt a hollow crack catch on my finger.
It was much lower than I had imagined.
I applied a little pressure to the entrance and pressed down firmly.
My sister’s breath suddenly quickened.
"A-ah... it hurts..."
So this was it.
I felt like I had found a clear landmark.
"Hold on."
I knelt and moved even closer.
I removed my hand and grabbed my painfully erect cock.
Since I knew the general position, I could insert it even if I couldn’t see clearly.
I rubbed my hot body against the moist skin around the found hole.
"......"
While carefully stroking the winding slope, the narrow crack finally caught on my finger.
"Hiiiik...!"
The tip of my glans caught on a dip.
It was exactly that spot.
Now I had to thrust.
"......"
"......"
No conversation between us.
Only the sound of breathing filled the room, representing the heartbeat.
No condom.
I had planned to go in raw from the beginning, but my sister hadn’t objected to it.
She must have been too flustered.
"..., here I come."
From this point onward, it was like crossing an irreversible river.
Until now, I could have ignored it by pretending we were siblings.
Um.
What now?
"..., ugh."
But I was already hard.
Fuuk. That sound was only in my head.
My cock slipped into the narrow hole.
Her vagina was hot, and the wrinkled mucosal walls gently squeezed my shaft, opening a path.
"Aaaah! Ah...!"
My size wasn’t particularly huge.
Just a little bigger than average.
But because it was my first time receiving such a large object, my sister writhed and screamed in a tearing pain.
"It hurts, it hurts, it hurts!"
"S-stop...!"
Slap. Slap.
The dull sound of skin slapping skin split the sealed darkness.
"Aah, ah, ah..., uup, uuup!"
"..., be quiet."
To prevent her voice from leaking out, I covered her mouth with my palm.
It was an old villa one-room apartment, so even a little louder noise would carry to the next room.
Through the palm, I could hear her panting and muffled, terrified moans.
"Hah, hah, ugh."
"Uuh! U-uup...!"
"F-fucking...!"
Before insertion, it didn’t seem very wet, but once I started moving, it became smooth.
I covered her mouth with one hand to control her screams, and with the other I frantically grabbed her heavy breasts that swayed up and down.
This is sex.
This is real sex.
"Huff, huff."
How much time had passed?
It didn’t feel like I had moved that long, yet sweat poured down my entire body.
There might have been a lack of exercise, but this was an enormous full-body workout.
"U-ah, ugh, ugh..."
The initial tearing pain slowly subsided.
My sister’s voice became quieter.
"Hah, hah, it feels good, you bastard. Hah...!"
After that, my own rough breathing.
My sister didn’t place her hands on my waist or wrap her legs around me.
She simply accepted it quietly like a dog being flipped over.
I went wild on top of her vulnerable body, thrusting my hips.
Soon my lower abdomen felt stiff and I reached my limit.
And then.
"I’m cumming...!"
"..., uueh, uuup, uuueh!"
"Ugh...!"
My whole body trembled on its own, like electricity running through it.
The overwhelming pleasure that felt like my brain was melting made it impossible to tell whether I was cumming or peeing.
Because of the excessive excitement of my first sex?
Or because I was raping my own sister?
"Huu..."
"U..."
Listening to my sister’s moan beneath me, I weakly rocked my hips to soothe the overly sensitive glans after climax.
The sensation of her inner walls clinging to my penis was vivid.
I squeezed every last drop of my semen deep inside my sister.
- [Registration condition met.]
- [The target individual can be registered as a slave. (Target individual: Kim Areum)]
- [Would you like to register?]
I did it one more time.