Chapter 29, You Mustn't Cross the Line.
Chapter 29, You Mustn't Cross the Line.
The day I was heading out to Jeju Island for my business trip.
My eyes snapped open before the alarm even went off in the early dawn.
A 3-night, 4-day schedule—short if you think about it that way, long if you think about it another.
But knowing the destination was Jeju Island, home to the S-Class Dungeon, the Dragon's Tomb, had me on edge.
I got out of bed, stretched, and loosened up my stiff body.
Outside the window, the sun hadn't risen yet—it was still the wee hours of the morning.
"Huu..."
I picked up the car key I'd prepped on my desk.
The familiar grip that fit perfectly in my hand.
The smart key for my beloved ride, the Ray.
I considered taking the airport limousine, but with luggage and all, I decided to drive, breathe in some early morning air, and just park at the airport lot.
Parking would cost a bit, but this trip was fully covered by the company card, so no worries.
Simple toiletries, change of clothes, and the tablet PC and portable battery for work on-site.
Finally, I double-checked that I had my Hunter Management Bureau ID.
Without this, I'd be in trouble once I got there.
I couldn't even enter an S-Class Dungeon without it.
All prepped, I quietly opened my door and stepped into the living room, careful not to wake anyone.
I tiptoed, muffling my footsteps so the family wouldn't stir.
"..."
But there, standing smack in the middle of the living room, was someone.
My younger sister, Gyeong-ah.
I jolted back in surprise.
Felt like my heart had dropped straight to the floor.
"You scared me... What are you doing up at this hour? Not sleeping?"
I kept my voice as low as possible.
The clock on the wall pointed to 5 a.m.
This wasn't a time for Gyeong-ah, the quintessential night owl, to be awake.
Normally, she'd be dead to the world, kicking off the covers in deep slumber.
Gyeong-ah, in her pajamas, stared straight at me.
"Oppa..."
"Yeah, what's up? Bad dream or something?"
"No... I wanted to see you off since you're leaving..."
See me off?
I thought I'd misheard.
Hikikomoris these days even send their brothers off on business trips?
Guess I can't call her a hikikomori anymore.
Gyeong-ah hesitated, then took a step toward me.
The sound of her slippers dragging across the floor broke the silence.
"Oppa, when will you be back?"
"I told you yesterday. Forgot already?"
"You didn't tell me. I don't remember."
She shook her head seriously.
Looks like she'd half-asleep when I mentioned it yesterday and blanked it out.
"3 nights, 4 days. Leaving today, so I'll be back in four days. I'll be back before you know it."
"Four days... That's too long."
Gyeong-ah's face fell visibly.
Her lips pouted out just like when she was a kid.
Even though she was twenty-three now.
Then, suddenly, she dove straight into my arms.
"If you're not home, Oppa, I get worried..."
"Man. Weren't you always telling me to get out of the house more?"
"Th-that was just when I was being immature."
Gyeong-ah and my relationship used to be your typical sibling dynamic.
Constant bickering and fighting.
But things changed a lot after Mom and Dad passed away.
Now, for Gyeong-ah, it was just me and Noona left.
"Noona's there. Don't worry too much."
"No... It's you I'm worried about, Oppa..."
"Ahem. Then behave better usually."
"Sorry..."
She hugged my waist tight and rubbed her face against my chest.
Her body heat seeped through the thin pajamas.
Her clinging to her protector—me—was only natural, in a way.
Of course, I got it.
This wasn't just some local business trip; it was an inspection of an S-Class Dungeon.
Turn on the news, and it's all hunter injuries and Dungeon Break horrors.
No one knows what could happen there.
I let out a sigh and gently stroked Gyeong-ah's hair.
Her messy strands slipped through my fingers.
"Don't worry. You think I'm going in to raid the dungeon? It's just an inspection, inspection. Why would a civil servant go into danger? I'll just watch from the back."
"Really? You can't get hurt..."
"Yeah, I promise."
Oh yeah, gotta give her some pocket money.
I opened the banking app and wired 50,000 won to Gyeong-ah's account like it was routine.
"There, pocket money sent. While I'm gone, if Noona's out, order delivery or something. Don't skip meals."
[Receive 50,000 won.]
Gyeong-ah's phone in her pocket buzzed with a short jjing.
Only then did she loosen her arms around me and check her phone.
"Thanks, Oppa."
"Yeah. Gotta go before I'm late. Head back to bed now. Lock up tight."
I patted her shoulders and headed for the front door.
As I was putting on my shoes to leave, something tugged sharply at my clothes from behind.
"Wait."
"Huh? What now."
I turned, and Gyeong-ah had a tight grip on my wrist.
Her head was bowed, so I couldn't see her face well, but her ear tips were slightly red.
Her breathing felt a bit ragged.
"Oppa... You gave me money."
"Yeah, I did. Not enough?"
"No, not that... Doesn't that mean I should do something for you too?"
"..."
I swallowed hard.
Do something for me?
No way was she talking about chores or laundry.
Gyeong-ah's eyes weren't about wholesome labor.
They were loaded with sexual intent, obviously.
"Gyeong-ah. I have to get to the airport first..."
"Shh."
Gyeong-ah pressed her index finger to my lips, silencing me.
Then she roughly shoved me against the wall.
Thud.
Cold wallpaper hit my back.
The entryway sensor light flicked off, plunging the living room back into darkness.
In the dark, only Gyeong-ah's hot breath felt real.
"Wait, we can't do this. I don't have time, Oppa..."
"You want it too, Oppa."
Her hand slid down to my waist, unbuckling my belt in a flash.
I heard the buckle loosen, the zipper go down.
Without hesitation, she yanked down my pants and drawers together.
Plop.
They caught at my ankles.
My already rock-hard dick sprang out.
Gyeong-ah eyed it and dropped to her knees.
"Chu-eup..."
Her warm, wet mouth engulfed my dick whole.
Already fully erect, it went straight down her throat in one go.
Her head buried into my crotch.
"Ah, seriously, we can't..."
Gyeong-ah worked her tongue busily.
Licking the shaft, teasing the glans with her tongue.
Plus, the intense squeeze from her throat.
Who knew my little sister's mouth could be this hot.
Unthinkingly, I placed my hand on her head.
Gently stroking her soft hair.
Feeling my touch, she bobbed her head even more eagerly.
Chup.
Churu-reup.
Chok.
The lewd wet sounds echoed through the living room.
I just hoped Noona wouldn't hear.
"Haa... Ngh!"
The signal hit suddenly.
Wanted to hold out and enjoy more, but thoughts of catching my flight sped it up.
"Gyeong-ah, I'm... I'm gonna cum!"
Even at my shout, she didn't pull away.
If anything, she took it deeper, clenching her throat tight.
Like she was determined to take every last drop.
Byu-reut! Byu-reu-reut!
Couldn't hold back—I came.
Hot semen shot down Gyeong-ah's esophagus.
She sucked it all up without spilling a drop and swallowed with greedy chok-chok sounds.
"Puha..."
Only after it was all out did she release me.
She licked the saliva from her lips and looked up at me.
Her eyes were flushed red.
Gyeong-ah slipped my dick back in once more, cleaning off every last remnant.
Then she stood, straightened my clothes.
Pulled up my underwear, helped me into my pants, buckled the belt neatly.
"Oppa..."
Gyeong-ah said in a flushed, tiny voice.
"Come back safe from this trip."
"Y-yeah..."
"When you get back... I'll let you do one thing you want."
My heart sank at her words.
One thing I want?
No way I didn't know what that meant.
She was saying she'd allow something even more intense than what we'd done so far.
The moment I heard it, snap!
I heard the thread of reason break.
Four days from now?
Wait until I got back from Jeju Island?
That was torture.
"No."
"Huh...?"
"Four days is too far. Do it now."
"N-now?"
Gyeong-ah's eyes went wide in panic.
No words—I grabbed her shoulders and pushed her back.
Her body flopped onto the sofa behind her.
"O-Oppa? Wait..."
She looked a bit scared but didn't resist.
I climbed on top of her sprawled on the sofa.
Then, in one swift motion, stripped off her thin shorts and panties.
Her white thighs and the pussy between them were fully exposed.
"Ngh..."
Gyeong-ah shyly covered her face with both hands.
I spread her legs wide and positioned myself between.
Gently rubbed her already wet pussy with my fingers.
Vaginal fluid oozed out, sticky.
"You did it for me, so now it's your turn."
I lowered my head and pressed my mouth to her pussy.
Just like she'd pleasured my dick, now I'd pleasure her pussy.
The so-called cunnilingus.
"Hng!"
My hot tongue touched her, and her hips bucked up.
Ignoring it, I focused on licking her outer and inner labia.
Every sweep of my tongue over the soft flesh drew moans from her.
"O-Oppa, there, not there..."
I flicked the tip of my tongue at her vaginal entrance.
Then rolled it into a point and thrust it inside.
Her vaginal walls clenched hard around my invading tongue.
"Hng... Th-there, not there..."
Gyeong-ah gripped my hair and twisted her body.
Her legs trembled from the overwhelming pleasure.
I sped up, pistoning my tongue fast.
Flicking her clitoris like a switch sent her moans to a peak.
"Haa... Haa..."
Gyeong-ah went limp, panting roughly.
Looked like she'd climaxed.
Not squirting semen like Noona, but still.
Satisfaction washed over me from making her cum.
I grabbed some tissues from nearby and meticulously wiped her soaked pussy.
But that wasn't enough.
A urge welled up to check something more.
I stopped wiping and slid my index finger into her vagina.
"Hng...?"
Stopped midway.
Hadn't broken her hymen, it seemed.
Fresh off her orgasm, the inside was scorching hot.
The vaginal walls gripped my finger vividly.
Warm, tight, wet.
A dangerous thought flashed through my mind.
'What if I put my dick in here instead of my finger? How good would that feel?'
This warm hole clenching my cock...
Just imagining it had me getting hard again.
'Crazy bastard.'
I shook my head hard to snap out of it.
If I went all the way to insertion here, it'd be crossing an irreversible river.
Really crossing the last line of true incest.
Not yet...
Not yet.