The Happiest in This World
Straddling me, winding her gaze down over my body as she took me again and again, Jia searched my face.
"How is it, Oppa? Feeling what's inside me for the second time now? Does it feel good?"
Squeak…
"Nnngh—!"
Her hips rocked up and down as if to demand an answer in the affirmative, and my waist bucked in spite of itself, forcing out a moan that sounded almost like a lament.
"I knew it—you feel good, don't you, Oppa? I'm so glad… so glad. I'm happy."
Cupping both palms against my cheeks as she gazed down at me, Jia narrowed her eyes and smiled. The beloved one's happiness had lifted her own mood along with it—her face flushed bright with shared joy.
Looking up at this demon, this little sister who was finding her happiness because of me, I could tell that if I showed even a flicker of refusal, this being would stop without a moment's hesitation.
But I couldn't do it.
I had no will to do it.
The last shred of moral sense that had been screaming a desperate resistance crumbled away; my ethics were cast out and rejected, and what remained was nothing but the craving for pleasure. And according to that craving, the part of me buried inside Jia swelled back to its fullest hardness.
"Ahh♥"
Feeling me grow inside her, Jia curved her lips into a satisfied smile.
"I loved the way you ravaged me so mercilessly before, but like this…"
Swooosh…
Jia closed the distance in a single motion, and her lips pressed against mine with a warmth both tender and searing.
Chuuwp…
We were kissing.
With my own little sister.
It meant something different from sex—this was not mere pleasure, but an act of expressing love and affection between lovers, a declaration of the heart. And I had done it with the sister to whom my own blood was bound.
Chuluwp… chuuwp♥
My mind went hazy. I had only just had my first experience recently; there was no way I knew the first thing about how to kiss. As if she understood that—or as if she welcomed it—Jia's tongue slipped past my lips with practiced ease.
As though it already knew exactly where to be, that other tongue of hers found mine with a familiarity that bordered on the uncanny, and entwined around it.
Chuyuwp♥
In the depths of that deep, devouring kiss, Jia caught my tongue between her lips and sucked it gently. Sometimes hard, sometimes soft—her mastery of rhythm and pressure was a fierce stimulation to someone as inexperienced as I was. Between our pressed lips, saliva mingled with saliva, her tongue hungering for the very existence that was me with an intensity that made me shudder.
Jyuwp♥♥, chuuwp♥♥
A one-sided ravaging. And yet, the process of someone devouring me, bit by bit, came laced with a pleasure too sweet to refuse.
Being consumed—by a demon. By my little sister.
Faster… faster still…
The acceleration, once begun, ate away at everything inside me with a speed that could not be stopped.
Chuuuwp…
When Jia slowly drew her lips away in the fog of my dissolving consciousness, astonishingly, it was a sense of loss that came first.
Jia ran her tongue languorously over my saliva glistening on her lips, gathered it into her mouth, and—deliberately, so I could see—swallowed, her throat bobbing.
"Delicious… everything about you. Everything that comes out of you. All of it."
As if reluctant to let a single trace of me remain, Jia licked her lips once more with her tongue—and, finding nothing left, pouted with genuine disappointment.
Gazing down at me as I watched her, spellbound, she curved her mouth into a smile like a fox's.
These were expressions the Yoon Jia I knew would never have worn, acts she would never have performed. It was possible only because that Yoon Jia had been devoured by a demon—because her memories, her personality, her very existence had been copied and overwritten.
"I love you."
Suddenly Jia's face changed—back to the familiar face of my everyday little sister—and with that earnest expression, she laid her affection for me completely bare.
"Hhk—th-that's… that's cheating…"
A confession of love, delivered with a serious face like an ambush out of nowhere—I panicked, utterly thrown.
Titter…
Whether my expression pleased her, or whether her aim landing perfectly delighted her, a sadistic bloom of laughter spread across Jia's face.
"Men are weak to words like these, you know? You love it when someone whispers sweet nothings while you're inside them. And no wonder—because even as you hate me, your little sister, Yoon Jia… part of you loves me, doesn't it, Oppa?"
Love-hate: the one emotion my little sister still carried. Ambivalent, contradictory, double-edged—dislike braided inseparably with affection.
"When a woman you like whispers that she likes you, that she loves you, a man gets more aroused than at any other moment. I know that about you, Oppa. So the fact that you're aroused right now… is proof that you like me, isn't it? That's enough for me. I don't need anything else. With your love, everything else in the world is worthless."
Jia's whole body suddenly shuddered. Clenching her lips tight as if to swallow down something surging through her, she bit down hard—yet the corners of her mouth trembled all the same.
A thrill like a shiver of dread. Jia's eyes, pushed to their very limit, slowly cast off reason, and filled, edge to edge, with nothing but me.
"I can't hold back anymore… so my wicked little sister… my naughty little sister is going to get a little rough. You'll forgive me, won't you?"
Sluuurp…
Her arousal ran down along my length and fell, scalding hot, against my lower belly. How worked up she must have been—her entrance was already so flooded that it was spilling out past her lips.
"I'm happy."
When the hardened part of me, tightening within her clenching heat, answered for me, Jia began to move her hips in earnest, ready for the real act at last.
RIIING…
A phone rang out from somewhere, and our eyes moved to it at the same instant. On the phone sprawled across the floor, the screen flashed with the caller's name: My Beloved Mom.
Jia and I realized it was our mother calling, and our gazes crossed for an instant in the empty air. Faced with this interruption—this interruption neither of us could easily refuse—Jia felt irritation tangled with restlessness.
Not answering was an option. But if we did that, our worried mother would, without a doubt, come marching straight into the store.
"Yes, Mom?"
Sharp as she was, there was no way Jia didn't know exactly what I was thinking. So, in the end, she answered the phone.
"Mm… we've almost finished picking out his clothes. Since it's custom-fitted, it's taking a bit longer than expected. Sorry—I'll be right there."
Back again, flawlessly, in the shape of the Jia I had always known—that eternally fascinating transformation—she chatted with our mother as sweetly as ever. And our mother, on the other end of that line, had no way of knowing that the daughter speaking to her now was a monster that had eaten a girl's existence and crawled inside her skin.
Swooosh…
Mid-call, Jia's eyes slid toward me.
Grin.
A knowing, loaded smile. Before I could even wonder what that smile meant—
SQUEAK!
"NNGH!!"
Still holding the phone, Jia dropped her raised hips all the way down, and a violent surge of sensation tore through me—a moan nearly escaped. Only the miracle of remembering she was on the phone with our mother kept it smothered in my throat.
THUMP♥ THUMP♥
The savage descending strokes drove me until my length struck the far end of her. Knocking against the mouth of her womb—that chamber meant to receive what I would pour out, to cradle a new life—roused a conqueror's thrill, the feeling of violating a woman to her very core.
"Khh—nngh!"
"Uh-huh! Oppa's terrible at picking out clothes, so I helped him a whole lot. Mmm… no, Mom, it's fine. Being with Oppa is always such a pleasure…"
Even as my sister's violent riding threatened to wrench the moans out of me faster than I could choke them down, she carried on her conversation with our mother, cool as anything. But for all the calm in her voice, her eyes stayed fixed on my face from above, savoring the existence that was me down to the last drop.
"Oppa, are you getting sleepy?"
That voice—strange and yet so familiar—came suddenly from beside my head, and I lifted my gaze. There was the woman from the shop, the one I'd finished inside and left sprawled on the floor earlier, leaning over me and smiling down.
Looking closely, I saw a tentacle trailing from the back of her neck, linking her to Jia. Unable to move her mouth while she talked to our mother, Jia was using the woman's body like a puppet—speaking to me through her.
"Ahaha… Mom, honestly. You know how much I love Oppa… as a sister, of course."
"That's a lie, Oppa. I love you as a woman. I'm having sex with you as a woman. I'm going to become your lover. I'm going to make love with you."
While Jia laughed and chatted on the phone, the woman spoke her sister's inner voice in her place.
"Don't hold back anymore—you'll be feeling this good so much from now on, there's no need to ration it. This happiness is going to last forever…"
The hollow-eyed woman stroked my hair tenderly as she voiced the demon's words this time.
THUMP♥♥ THUMP♥♥…
The pounding against her womb grew fiercer. The clenching grip threatened to wrench me out of her root and all, granting me no room for rebellion, dragging me toward the peak at breakneck speed.
"Hm? What's that noise, Mom? Sounds like some kind of construction from the shop next door… a little loud, isn't it?"
The sound ringing all the way through the receiver, Jia brushed off with perfect composure.
Tight… hah, I'm at my limit…
Smooch.
"So let's stop holding back and feel good together, okay? Everything you've endured, everything you've swallowed down—spit it all out. I'll take all of it. I'll hold all of it. Come on… come for me. Now."
When the woman kissed my forehead and spoke in that gentle but faintly coercive voice, what was inside me broke loose like a stallion freed of its reins, surging out in a heartbeat.
BYURURURUT—
"GGRRGHK—!!"
The moan that burst out wasn't mine. It was Jia's.
Filled from within by my release, Jia trembled from head to toe with joy, and her body—unable to bear its own response—let the phone slip from her fingers.
"…Jia? I heard something just now… Jia, are you okay?"
Mother's worried voice drifted up from the fallen phone. Twice spent, every ounce of strength gone from my body, I couldn't even twitch a finger.
Bearing the violent aftershocks still rippling through her, Jia stretched out a trembling hand, picked up the fallen phone, and pressed it to her ear.
"…Yes, Mom, I'm fine. I'm… fine. I bumped into a customer at the store and dropped the phone for a second. Ah… we've picked out all of Oppa's clothes. We'll head out now. Mom, where are you? Hm?… How am I doing right now?"
Looking down at me as I gazed up at her through the haze, Jia answered, clear and unhurried, word by word.
"Right now, I'm—"
One hand stroking her lower belly, she seemed to be savoring, with pure delight, the feeling of everything I'd left pooled deep inside her.
"—the happiest I have ever been in this whole world."
And a being no longer human smiled down at me, wide and radiant, brimming with love.