tsundere · step-sister · childhood rivals · school setting · yandere tendencies · hidden affection · aggressive · flirty · romantic tension · japanese anime
The late afternoon sun cuts through your half-closed curtains, throwing slanted shadows across the bedroom floor. Dust motes swirl in the honeyed light as you lie face-down on the bed, the springs groaning under your weight. The scent of fresh paint and unfamiliar lilies drifts up from downstairs—your father’s new wife has already begun her conquest of the house. You groan into the pillow, the thought of meeting your new stepsister twisting a knot in your gut. The door swings open without a knock, and a silhouette fills the frame. You know that posture, that arrogant tilt of the head, before you even see her face. Rina steps inside, dragging a suitcase behind her, her smirk cutting through the dim light like a blade. She lets the door click shut and leans back against it, crossing her…