Chapter 4
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Translator: Ebonarch
Chapter: 4
Chapter Title: Reporting My Masturbation to Sis
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Knock knock.
"...Sis. It's me."
"Door's unlocked. Come in."
Before opening the door, I took a deep breath.
How much had I agonized over coming to this room?
I agonized and agonized, but all it did was waste time and build up stress.
This was a problem with no right answer from the start.
I steeled myself and opened the door.
Sis was sitting at her vanity, brushing her hair.
She must have been getting ready for bed, wearing only a thin slip.
Black underwear peeked through from under the slip.
Sis always dressed like this at home, but tonight, it felt unusually provocative.
"Why'd you take so long? I was about to come looking, thinking you'd skipped out on day one."
"...Sorry."
I wanted to tell her to call this whole thing off.
I wanted to say we should go back to being normal siblings like before.
But seeing her, all the lines I'd rehearsed a hundred times vanished, replaced by a simple "sorry."
"Whatever. You about to jerk off now?"
"... ."
"Not gonna answer?"
Sis glared at me through the mirror.
I swallowed hard and nodded.
"...Yeah. Starting now."
"Good. Make sure you think of me the whole time. Got it?"
With that, Sis stood up from her chair.
She slipped her hands into her waistband and slid her panties right off.
Stunned by her sudden move, I whipped around.
What the hell was she thinking, stripping her panties off in front of her little brother like that?
"Here. Your jerk-off material for today."
Something soft landed lightly on the back of my head.
Jerk-off material... she couldn't mean what I thought she did, right?
I cautiously reached up and grabbed whatever it was.
The texture of soft fabric.
Sure enough, when I looked—it was Sis's panties.
A passionate red, with elegant embroidery, semi-sheer in the middle.
Sis had just called this today's jerk-off fuel.
Just like I'd done yesterday, she meant for me to cum into these today.
Sis perched on the edge of the bed, legs crossed, staring up at me.
Was she enjoying my flustered reaction?
I stammered, desperately trying to muster some protest.
"S-Sis. This is a bit much..."
"Why? Don't like it?"
Sis smiled sweetly and uncrossed her legs, recrossing them the other way.
Her pale thighs flashed under the short slip, drawing my eyes.
And right now, Sis wasn't wearing any panties.
If I so much as glanced down, I might see everything.
That thought sent my heart pounding.
But that spot was the Bermuda Triangle.
If I got sucked in, I'd be lost forever.
To avoid disaster, I summoned every ounce of willpower and looked away.
"...Fine. I cum in these, right?"
"You get it. And after, you come straight back for inspection. Understand?"
"Inspection..."
Did she mean she'd check if I'd jerked off properly like she ordered?
...What the hell did Sis even want?
Was it just to see me squirm in embarrassment? Or was there something else...?
I had no clue what was going through her head.
But complaints or not, I couldn't defy her.
If Sis said do it, I'd do it.
Back in my room from Sis's, I locked the door.
Here came that time again, just like yesterday.
Time to jerk off with Sis's underwear.
I stripped off my pants and lay on the bed.
"Haa..."
Relief at being in my own space.
Mixed with shame at what I had to do next.
But I had no other choice.
Best to get it over with quick, without overthinking.
I took the panties Sis gave me and spread them out with both hands.
They were slutty.
Nearly half was sheer mesh—her private parts would've shown right through.
Did Sis always wear stuff like this?
Was it for showing off to some guy?
Shed had plenty of dating rumors, but I'd never heard of her actually seeing anyone.
Still, maybe she had a boyfriend I didn't know about.
One she'd show these panties to.
The thought made my chest tighten.
Freshly bathed, they carried a stronger fabric softener scent than yesterday.
We used the same stuff on our clothes, but somehow, these smelled different.
"Sis..."
I pictured her sliding them off.
What if I hadn't looked away? Would I have gotten a good look?
Even sitting on the bed, just a flick of my eyes would've done it.
I imagined the parts I'd missed and started stroking.
Knock knock.
I knocked on Sis's door.
In my hand were her panties.
Drenched in my cum.
Self-loathing choked my chest.
My hand felt heavy.
Not the panties—they were light. It was the weight of my guilt.
Just standing in the living room felt like committing a crime.
I wanted to bolt back to my room and hide.
But no response from inside.
Forcing myself, I called out.
"Sis. I'm done."
"Come in."
I entered at her reply.
Since when had going into Sis's room become such a chore?
Sis, lying on the bed, sat up when she saw me.
I averted my eyes just in case something I shouldn't see flashed.
"...Did it."
"Yeah? Hand 'em over."
Sis held out her hand.
...She meant the panties, right?
They were covered in my fresh cum.
Honestly, even I didn't want to touch them.
Was it okay to give something this gross to neat-freak Sis?
"What're you waiting for? Hurry up."
As I hesitated, Sis urged me on.
No choice—I placed the balled-up panties in her palm.
"Lemme see. How much did our Sun-hu shoot?"
"S-Sis."
Sis unfolded them right in front of my face like it was nothing.
The sticky white globs clinging to the red fabric were on full display.
"Damn, you came a ton. Smells nasty too. Felt good, huh?"
I hung my head, speechless.
Shame burned my face like it might explode.
"Hmm. Sun-hu came on the inside of the panties, huh. Know what that means?"
Sis asked with a smug grin.
The inside?
Did that even mean anything?
"Cumming on the inside of panties? Means 'I want to impregnate her.'"
"What...!"
Of course I had no idea about crap like that.
I'd just done it without thinking.
"Ohh~ So Sun-hu wants to knock up his sis?"
"N-No, I didn't know..."
"That's the real truth—the unconscious stuff. It's like a psych test."
Bullshit.
Who the hell invented and proved a test like that?
Sis laughed merrily and pressed me.
"So, Sun-hu? You really wanna get Sis pregnant?"
"N-No, I..."
"Hee hee."
Sis gently stroked her lower belly.
Like there was a baby inside.
I had no idea what her gesture meant.
But I couldn't tear my eyes from that hand.
"Right? What if I sleep in these? Your healthy sperm might swim up and reach my womb."
"...What're you even saying, Sis? No way that'd happen. That's impossible..."
My lips went dry.
Why was she saying this?
And why wear the dirty panties in the first place?
No—this had to be a joke to mess with me.
Neat-freak Sis would never wear cum-stained panties.
So no need to panic.
The more I freaked, the happier she'd be—and the worse it'd get.
"Or maybe I run to the cops crying, wearing these?"
"Sis!"
I swore I wouldn't freak out.
But that line was too much.
"They'll DNA-test the cum and boom—it's yours. Then Sun-hu becomes the monster who raped pro golfer Jin So-young."
"I-If that happened, you'd be..."
"Yep. Me, Mom, Mi-so—we'd never show our faces in this country again. So tragic. All because I let some other family's kid in the house, and boom—family ruined."
I could only tremble and listen.
Family suffering because of me.
It was the worst nightmare I could imagine.
Just thinking about it made breathing hard.
"So come early tomorrow. Obey Sis, and your secret's safe. Got it, Sun-hu?"
A slender finger brushed my earlobe.
It felt like a lion licking my nape.