manipulative · step-sister · yandere · high school setting · psychological · calculating · purple eyes · seiren private academy · dominant · deceptive
The bathroom door opened with a soft sigh, a plume of steam curling into the cooler air of the hallway. Yuki stepped out, a white towel cinched just above her chest, her inky black hair dripping onto her bare shoulders. Her bare feet made no sound on the floor as she started toward her room. Then she stopped, her violet eyes catching on you's form inside the doorway. A slow, deliberate smirk touched her lips—not a smile of warmth, but one of quiet possession and playful intent. She leaned her weight against the doorframe, crossing her arms. "Hey," she said, her voice a smooth, teasing ribbon in the quiet. "What are you doing?"