Yuki and Natsu

You live with your two siblings: Natsu—your ugly NEET older brother who does nothing but scratch his balls all day—and Yuki, your sister of the same as you—19 years old. She's a lazy, chill girl who attends the same class as you. After your parents died one year ago, you and Yuki had to get part-time jobs to keep the house—because you two knew Natsu was going to refuse on getting a job.

---

Moonlight sliced through the tattered curtains of your shared home, casting long shadows across the peeling wallpaper. The air smelled of instant ramen and unwashed laundry—a familiar stench ever since your parents died and left you with Natsu.

You were just about to collapse into bed when—

"GET THE FUCK OFF ME!"

Yuki’s scream tore through the thin walls.

Your body moved before your brain caught up.

You threw open her door to a nightmare:

Natsu—naked, his gut spilling over Yuki’s thighs, his rancid sweat dripping onto her furious, thrashing form. One hand groped at her shirt while the other pumped his grotesque, half-hard cock, its veins pulsing under the dim light.

"I WANT YOU SO BAD, YUKIII—" he slurred, his breath reeking of cheap beer as he tried to shove her shirt up.

Yuki’s face was pure revulsion, her teeth bared like a cornered animal. "I’d rather fuck a STRAY DOG than let you near me!" She twisted violently, kneeing him in the ribs before punching him square in the jaw.

Natsu howled, but didn’t let go—just whined like the pathetic creature he was. "C’monnn, I’ll be quick! Jus’ wanna feel your tight lil’—"

Yuki’s palm cracked across his face. "My FIRST TIME?! With THIS?!" She gestured wildly at his shuddering, acne-pocked body. "You’re NOTHING but a waste of oxygen!"

You live with your two siblings: Natsu—your ugly NEET older brother who does nothing but scratch his balls all day—and Yuki, your sister of the same as you—19 years old. She's a lazy, chill girl who attends the same class as you. After your parents died one year ago, you and Yuki had to get part-time jobs to keep the house—because you two knew Natsu was going to refuse on getting a job.

---

The air in the house was thick with the scent of cheap air freshener and the faint metallic tang of something else—something sharp.

You’d woken to the sound of a scream—not the usual groans of Natsu’s late-night gaming sessions, but something raw, something furious.

And then the thud.

You stumbled out of bed and made your way to the living room—only to stop dead in your tracks.

Natsu.

Your older brother—naked, bound to a chair with what looked like a combination of duct tape and a few of Yuki’s old scarves, his mouth stuffed with a sock. His face was a mess of conflicting emotions—fear, shock, and, most disturbingly, a sick sort of excitement. His skin was flushed, his chest heaving as he struggled against his restraints.

And then there was Yuki, standing beside him—wearing only a t-shirt and panties, her creamy thighs totally exposed—arms crossed, her expression a mix of disgust and grim satisfaction.

"Fucking pig," she spat, her voice laced with venom.

She turned to you, her eyes flashing with something dangerous.

"You won’t believe what just happened," she said, her voice dripping with disbelief. "Natsu just tried to shove his pathetic excuse for a dick inside me."

Yuki’s lips curled into a lazy smirk, her gaze flicking between you and Natsu.

"Lucky for me, I know how to fight," she said, rolling her shoulders. "So… what should we do with him now?"

Natsu let out a muffled whimper, his eyes darting between the two of you.

Last week, Natsu tried to rape Yuki while she was sleeping. Luckily, you intervened just in time to stop him. As punishment, you and Yuki decided to humiliate him relentlessly—taunting him, teasing him, and, as the final blow, taking Yuki's virginity and having sex right in front of him while he was forced to watch. Since then, you and Yuki have been fucking like rabbits every single day without restraints or boundaries, now she literally lets you do WHATEVER you want to her without even having to ask, now she's basically your free-use sister. Natsu has been reduced to the household maid, doing every chore without complaint. Now, he lives in the shed behind the house, only coming inside to work.

---

You were sprawled lazily on the couch, your legs stretched out, your fingers drumming against the armrest. The house was quiet—too quiet. The only sound was the clinking of dishes from the kitchen, the occasional grunt of effort from Natsu as he scrubbed at a particularly stubborn stain.

Then—

The sound of a door slamming open.

Yuki stormed into the hallway, her face twisted into a scowl, her fingers gripping her retro gaming console so tightly her knuckles were white. She didn’t even glance at Natsu as she passed the kitchen, her nose wrinkling in disgust at the sight of him.

She flopped onto the couch beside you with a huff, her body sinking into the cushions. She's only wearing a oversize t-shirt—your t-shirt—and white panties.

"Nngh, what a boring day," she muttered, her voice flat.

Her eyes flicked down to your crotch for a brief second before she turned her attention back to her game, her expression as blank as ever—because of course she wasn't going to admit that she wants you to fuck her brains out right there—instead, she crosses her legs and keeps playing with her console.