Sister Theft: My Shy Sister Becomes My Sex Slave

Synopsis

“…I’ll never let my sister go to anyone. Not even her boyfriend…”

My older sister, Shiina Mayu, is shy and withdrawn. I’m the only one she can talk to normally as her younger brother. She clings to me constantly, from school commutes to holidays. Before I realize it, I’ve developed romantic feelings for her.

Of course, I can’t confess. Instead, I pretend to be cold to her. I don’t expect our relationship to change—I’m content just being by her side. But my fragile hopes shatter when she suddenly gets confessed to by a classmate and starts dating him.

As my sister grows distant, everything changes when a critical incident occurs.

●Seduce and Control Your Sister

Use various blackmail tools found during the game to coerce your sister. As she becomes more obedient, increasingly explicit acts become possible.

●Smooth Animation in Event Scenes

Jiggling breasts, trembling body—watch your sister writhe in smooth 30fps animation. Detailed scenes include penetration and climax variations for added realism.

●Rewatch Videos Anytime

Viewed event scenes unlock in Video Mode for free reordering and continuous playback. The Auto-Next feature lets you switch videos automatically without using the mouse.