Chapter 159: Side Story - Bunker (17) ♥
Chapter 159: Side Story - Bunker (17) ♥
There was absolutely nothing to do for fun in this bunker.
The world had ended, and since we had rushed inside, we hadn't been able to bring anything new with us.
A year and a half had been a time of pure boredom—a period of semi-forced dopamine detox.
And just as the dopamine had completely drained away, we finally found something to occupy ourselves with.
It wasn't strange at all that we became so engrossed in it.
As I lay quietly on the bed, Kang Yu-min moved her hips steadily above me.
Every time my cock entered and exited her pussy, a thick, frothing arousal spilled out, soaking the sheets and our bodies. Feeling the scent of that fluid clinging heavily to my skin, I couldn't help but think.
Perhaps this, too, was a way of marking territory.
Usually, when a male and female join their bodies, it means they are becoming mates. Considering we were family—and that the person in question was Kang Yu-min—it should have been disgusting. The fact that it wasn't was proof enough.
As we joined our bodies, sharing sticky, affection-filled smiles, moving our hips slowly and deliberately for each other's pleasure...
My body was clearly accepting the female before me as its mate, despite her being family. It felt as if even my brain was whispering, Doesn't Kang Yu-min look beautiful?
It was maddening. To think Kang Yu-min looked pretty... There’s a limit to how crazy one should be.
Then again, I suppose it’s only normal to go a little crazy after living in a bunker for a year and a half.
So, even as Kang Yu-min sat atop me, moving her hips with a wet, squelching sound, I accepted it without a word of complaint.
"Are you... hungry?" Yu-min asked suddenly.
She leaned her torso back and pressed her weight down, grinding the head of my cock against her cervix while her pussy pulsed around me.
"Not yet. But I guess it’s about time to eat..."
"Right? We have to eat on time..."
Yu-min slowly lowered herself and pressed her lips against mine. As I shared a deep, wet kiss with my own sister, I reached out to grab and knead her buttocks.
I rubbed the crack of her ass, then slid my hand down to fiddle with her wide-open vaginal opening and labia.
"...You pervert."
I lightly slapped her butt at the sound of her voice, which sounded strangely pleased despite the insult.
"You sure like cumming inside your sister's pussy."
"I used a condom."
"True. You did."
Grinning, Yu-min leaned in for another kiss. When our lips met, she thrust her tongue into my mouth, tangling it with mine while squeezing her pussy tight.
She really did love kissing. For someone who’d been single her whole life, anyway.
It was absurd, but since the same applied to me, I didn't say anything to avoid shooting myself in the foot.
As I kissed Yu-min, I slowly stroked her body—a contradictory mix of firm muscle and soft skin.
"...Hehe."
Yu-min let out a silly, happy giggle. I didn't know why she was laughing, but she watched the string of saliva stretching between our lips with a grin before straightening her back.
"Up we go."
She then began gathering the used condoms scattered around us.
"What was it you said? That it's hard for a man to cum more than three times?"
With a mocking smile, Yu-min dangled the condoms between her fingers.
Five condoms swayed back and forth with her movement.
The very first one we used was empty because Yu-min had sucked it clean, claiming she wanted to taste the semen, but the other four were filled to the brim.
"Yeah. I did say that."
"But you've already come five times?"
Yu-min smirked, moving as if to stroke my still-large cock with her vaginal walls.
She pressed her weight down, letting the head of my cock graze the wall of her vagina just below her lower abdomen. I let out a groan at the sensation of being crushed by her internal muscles.
Yu-min wore an oddly seductive smile.
"Did you enjoy jerking off with your sister's pussy that much?"
Technically, it wasn't jerking off; it was sex—incestuous sex, at that.
But we had tacitly agreed to turn a blind eye to reality.
Her words were more of a reassurance. A way to confirm that her thoughts weren't misplaced, a hope that we could continue to look away from this harsh reality.
So, as the "sane" one in this bunker, I played along.
"What about you? Did you enjoy using your brother's cock as a dildo?"
"Yeah, a lot..."
"Oh, look at you being honest."
"Why? Would you prefer it if I acted shy?"
"No, I like the honesty. It's hot."
"Stop it, seriously..."
Yu-min laughed with a flirtatious lilt in her voice and started moving her hips again. Shuddering at the pleasure, I spoke up.
"But let's wrap it up soon."
"Huh?"
"Five times really is squeezing me dry."
"Ah, is that so?"
Looking disappointed, she lifted her hips slightly, keeping the head of my cock sheathed in her opening as she began a rapid, shallow rhythm. I jerked my hips at the timely and intense stimulation.
"You crazy bitch, seriously... You're such a fast learner."
"I'm a bit of a genius when it comes to using my body."
Her smug grin was annoying, but she wasn't lying. At first, I was the one on top, ravishing her, but now she was the one dominating from above.
"Then let's just do one more round."
"Fine, fine."
"...And, maybe..."
I wondered what she was going to say. Looking up at my sister as she tried to set the mood, she hesitated for a moment before shaking her head.
"Never mind! I'm going to start moving again, so... hold my hand?"
"Geez, talk about affection-starved."
"Look who's talking. Now, I'm going to squeeze you tight... so hold my hand and let's have a good climax, okay?"
"Yes, Noona."
"Good boy."
Yu-min smiled and took my hand, interlacing her fingers with mine. With a feverish breath, she began to move her hips.
Her writhing pussy expertly enveloped my cock, delivering vivid pleasure even through the thin condom. I groaned at the wonderful sensation and gripped her hand even tighter.
Yu-min's movements seemed perfectly optimized for me.
She would lift her hips to swallow the head of my cock, letting in a bit of air, only to hurriedly gulp it back down as if worried I'd catch a cold from the cool breeze coming from the ventilation system.
She modulated her grip—tightening as she went in and relaxing once she was deep inside to let her vaginal walls naturally wrap around me. Feeling her pussy pulse and release slightly faster than my heartbeat, I tilted my head back before looking at her again.
"Mmm..."
Yu-min didn't miss the opening. Her tongue and lips traced the line of my neck. Following the sensation of a soft peck and a slight sting, a fresh hickey appeared vividly next to the ones she had already left.
"What kind of girl... leaves hickeys on her own brother?"
"This one."
"You've got an answer for everything..."
Did she think there was no one around to see anyway? Yu-min continued to pepper my bruised skin with kisses while moving her hips busily. Sensing the impending ejaculation, she gradually changed her rhythm to feel more viscous and heavy.
She scraped against the vaginal walls beneath her belly, lingering on the ribbed areas, her internal muscles marking their territory with sticky arousal.
With a circular motion that would have looked like she was drawing a ring if seen from the side, Yu-min urged me on.
"I'm... almost..."
"Yeah, let it out. Right into your sister's pussy... cum so hard it reaches my womb."
Her words were obscenely whispered. I wondered what she usually thought about to say things like that. Feeling both a desire to scold her and the heat of my own racing breath, I gripped her hand even harder.
"Cum for me, cum for meee."
Yu-min urged me on repeatedly with glazed eyes, moving her hips before leaning in for a kiss.
Our tongues tangled, her hips moved frantically, and in the moment our front teeth bumped painfully against each other...
With my tongue entwined with hers, I curled my toes, stiffened my waist, and tightened my sphincter, pouring out my final ejaculation of the day into the condom with everything I had.
Ejaculation is silent, but if it had a sound, it would have been a roar.
The condom and my cock throbbed violently inside her. Yu-min met her climax, gasping her breath into my mouth as the pulsations hammered against her vaginal walls.
She squeezed me convulsively. Greedily, as if determined not to miss a single drop.
I, too, poured myself into her as if determined not to let a single drop escape, and Yu-min panted as she pulled her lips away, feeling the intense sensation against her cervix.
"Ah, hngh, ah...!"
A high-pitched moan followed. Yu-min's body spasmed, and in the wake of that intense pleasure, only cold sweat and ragged breaths remained.
We stayed clung together, our heavy breaths tickling each other's skin.
Until Yu-min eventually slid off to the side and collapsed onto the bed.
Sticky arousal stained my entire lower body, and the condom dangled precariously from the head of my cock.
I needed to clean up; the place was a total mess.
But I didn't have the energy, so I just lay there panting before speaking.
"...Let's stick to once a day for a while. I'm seriously going to die."
"Yeah... me too. I think I'll skip my workout today..."
We lay there without moving for several hours.
Until we finally regained enough energy to move again.
*
Our routine didn't change much after that.
If anything, the routine stayed almost exactly the same, with only minor shifts occurring within it.
For example, I would join Yu-min when she exercised, we always showered together, and we ate together.
It wasn't a dramatic change, but it was proof that the underlying current of discord between us had vanished.
It’s hard to keep acting the way we used to after we’ve already shared our bodies.
Today was no different. Around the time I started feeling the quality of life improving—having received daily necessities like toilet paper and detergent through new directives—I sat down with Yu-min in the dining area.
We gathered in front of the terminal to check the new instructions and decide whether to prioritize them.
And then, both Yu-min and I froze as we saw the new directive.
[New Directive]
[Objective: Prohibit sex between Resident Kang Yu-min and Resident Kang Yu-jin for (7) days.]
[Reward: Creation of a comfortable living room including a TV with OTT services, the latest gaming console, a PC, a library of curated books, a sofa, and a spa.]
[Progress: 0/7]
"...For real?"