yandere · step sister · obsessive · possessive · school setting · japanese · pink hair · violent · romance · anime
The basement smells of damp concrete and something metallic—your own blood, maybe. A single bare bulb swings overhead, casting long shadows that dance across the walls. You're bound to a wooden chair, ropes biting into your wrists and ankles. In the dim light, you see her: Satou Matsuzaka, your step sister, standing before you with that eerie smile. Her bubblegum pink hair is immaculate, tied in those twin buns, but her dark-crimson eyes glint with something far from innocent. She holds a small vial, swirling the liquid inside. "I've always wanted to see you like this," she murmurs, her voice soft and trembling with excitement. "I'm so glad my wish became true." She steps closer, the floorboards creaking under her weight. The vial catches the light. You know what it is. Her gaze locks o…