A Sister's Desperate Stand
Plap! Plap! Plap!...
"Hngh! Hngk—!?"
Ji-seo slammed her hips down, driving my cock into her pussy over and over. Her body, moving under my will, let out broken screams as she inflicted masochistic pain upon herself, her lips parting with each ragged cry.
Every time she dropped her waist, the flesh of her lower belly bulged outward in the exact shape of my shaft. Her petite frame—smaller than any woman I had taken before—made the penetration feel more like impalement than insertion. Each thrust forced her insides to stretch around me, the pulsing of her organs transmitted directly through the thin walls of her cunt.
Yet no matter how brutal the act, her inner walls still scraped along my length, coaxing out the urge to climax.
"Nngh…!!?"
Ji-seo was suffering, but pleasure was bleeding through the pain. The mixture of virgin blood and her own slick arousal spilled from her stretched entrance in thick, viscous strands. Pain and pleasure were separated by the thinnest of lines; a single shift in perception could turn one into the other. That was why masochism existed as a fetish. Ji-seo might not have been one naturally, but brainwashing could force even that change upon her—rewriting memories, cognition, values, and desires alike.
Plap! Plap! Plap!...
"Khaah—!?"
She screamed, unable to tell whether the sound was agony or ecstasy, her back arching as she nearly blacked out. Even the will to resist was powerless against the flood of hormones my brainwashing stirred within her. The expression on her face was the same one Ha-rin and Se-ah noona had worn before they broke—proof that humans were ultimately slaves to pleasure.
Twitch…
"Ugh…"
I paused my movements to delay my orgasm. Ji-seo slumped forward, her upper body dangling limply like a zombie. Drool spilled from her lips onto my stomach as her unfocused eyes drifted without purpose.
I pulled her consciousness out of the mental prison I had locked it inside.
Life slowly returned to her vacant eyes. Focus returned, and her gaze gradually turned toward me.
"P-please… stop… I… I think I'm going to break… Please… stop…"
Unlike Se-ah noona, Ji-seo did not beg for her life. Her voice was tearful and pleading, but she never resorted to ugly desperation. Was this what people meant when they called someone strong-willed? The thought only made me want to torment her more.
"How about we make a bet?"
"…What?"
Her damp eyes blinked innocently. Even in this state, her cute reaction stirred my sadistic urges. Maybe I really was a sadist at heart.
"If you don't cum, I'll let you go. I won't touch your sister either. I promise."
"R-really…?"
She widened her eyes at my serious tone. I had to suppress a laugh at her naive reaction. Instead of resentment or anger, she chose to believe my words. It was almost adorable. Or perhaps she simply understood that showing those emotions now would be pointless. If so, she was frighteningly perceptive. The insight she had shown earlier, hidden behind her fragile appearance, had been remarkable.
"Really."
"You have to… keep your promise…! I'm fine, but… my sister… you mustn't touch her!"
Ji-seo stared at me, tears welling as she displayed her unwavering resolve.
"Haha! Even now, you're only thinking about your sister? Weren't you two fighting after that phone call earlier?"
She recalled the forced, hurtful words she had spoken to her sister under my command. For the first time, anger flashed across her face and she glared at me. But she quickly realized the futility of it and redirected her will elsewhere.
"We can fix it. Our bond isn't that shallow…! If I just get through this… I can meet her again and clear up the misunderstanding…!!"
'Ah…'
Blood rushed to my lower body. I wanted to see it. I wanted to witness how that determined expression would eventually twist and break. Could she truly escape the chains of brainwashing? I wanted to test her.
Squelch—!!
"Khup—!?"
I forced her body to move without hesitation. Ji-seo's eyes flew wide as her frame trembled violently. Her body's honest reaction was almost comical.
Plap!! Plap!! Plap!!...
"Kghk—. Kghuuu—!?"
"What's this? Is that all you've got? Where did that resolute face from earlier go? You look like you're about to piss yourself."
I kept pounding her ass downward while Ji-seo let out dying-animal noises. Yet her expression still showed her desperate struggle to endure—for the sake of protecting her beloved sister. It was genuinely moving. And I wanted to watch that moving resolve twist into exactly what I desired.
Plap!!! Plap!!! Plap!!! Plap!!! Plap!!!
"Ughkhuuu—!!?"
As the speed of her hips increased, her noble will rapidly crumbled. Her pussy, contrary to its owner's determination, gushed like a broken dam. Her trembling body grew more frantic. I could feel everything—her tightening walls greedily sucking on my cock, her instincts as a woman craving the seed trapped inside it, all transmitted directly through our joined bodies.
Throb!
A thick glob of her arousal drenched my shaft, signaling the approach of climax. Her hip movements were no longer purely my command; they were now driven by her own body's desires. In response, I finally released the orgasm I had been holding back.
"S-stop! Something's coming out!! It's coming out, so stop—!! N-no…! I can't… take any more…!!"
"Does that mean you're admitting you lost the bet?"
Ji-seo had sensed the approaching wave of pleasure and spoke in a panic. Even while begging, her hips continued to move—an ironic display. Miraculously, she was still holding on.
"Anything—hngh!? I-I'll do anything…!! So—haah!? Just my sister—!! P-please, just spare my sister…!!"
Her surrender came in mere minutes. Or perhaps lasting even that long was impressive in itself.
"You seem to be misunderstanding something. I can already make you do anything. And I'm not the only one who's going to ruin your sister. You're going to help me break her too."
Ji-seo's eyes widened as she grasped my meaning. A fear deeper than death twisted her face into something wretched.
Plap!!! Plap!!!...
"Please don't!! I'm begging you!! I'll do anything!! Please, I'm begging you!! Don't do this—!!!!"
"Hahaha!!"
Her desperate pleas and expression contrasted sharply with the vulgar way her hips kept moving, drawing a laugh from me. The outcome had never been in doubt, but the process had been entertaining enough.
"Then let's get along well from now on. My third slave doll."
"No!!!! Please, at least my sister—."
Squirt!!!
"――――!!!!"
A voice twisted into a moan echoed through the room first. Ji-seo threw her head back and sprayed the climax she had been desperately holding in. At the same time, I released as well.
"Khuh—."
Throb, throb…
My prostate pulsed, pumping thick ropes of semen directly into her womb. Virgin blood, her arousal, and my seed mixed together, engraving my genes inside Ji-seo's body.
After sharing the afterglow with her for a while, I looked at her face and felt my cock twitch again with renewed vigor.
Her tongue lolled out, wet with saliva. Tears streaked her face as she orgasmed—an expression filled with contradiction: lamenting and grieving the unwanted climax, yet also joyfully accepting the pleasure.
It was perfect.
"Ughk—. Kghuu—. Kghuuuup—."
Thud.
Ji-seo, still twitching from the aftershocks, lost all strength and collapsed backward. As my cock slipped out, a mixture of fluids splattered across the bed.
"Haha… No matter how many times I see it, the sight of someone broken never gets old."
I looked down at Ji-seo sprawled across the bed like a dead frog. Even after losing everything, the worry for her sister remained in the dried tear tracks on her face. Yet between her weakly spread legs, my semen continued to drool out in thick rivulets.
After leisurely savoring the depraved scene like a work of art, I moved on to the final step.
Creak—.
"Ughkghk—!?"
I tightened the mental screws to completely seal away the personality known as Lee Ji-seo. Her body flailed in a final, instinctive struggle for survival. It was a last-ditch resistance meant to protect her consciousness, but it was meaningless against the brainwashing already in place. Even with her mind caged behind iron bars, she still reacted. Now I intended to castrate even that minimal will.
Instead of a prison, I would drag her into an inescapable abyss.
Creak, creak, creak—.
"Khaaa… Kuhuuut…!?"
Lee Ji-seo was dying. Not her body, but her will—her very soul. She was becoming an empty shell, retaining only the memories and flesh while her personality was erased.
The death throes gradually subsided—
Click.
The screws could no longer be tightened, and Ji-seo's movements ceased. The screws, now fastened so tightly they could never loosen, signified the complete death of the human named Lee Ji-seo.
"Sis… I'm sorry…"
Before losing consciousness completely, Ji-seo whispered her final words. Her fading eyes gazed at someone only she could see as she spoke. But the apology would reach no one, remaining nothing but empty air.
Now nothing but a broken, defiled shell, she would move forward as a long-term piece to help destroy Lee Ji-ah alongside Ha-rin.
