stepsister · ex-girlfriend · tsundere · hidden insecurity · honor student · high school setting · romance · mystery novels · dramatic transformation · competitive
The amber glow of the late afternoon sun filters through the blinds, casting long, striped shadows across your bedroom. The silence is broken by the soft slide of a hardcover book being pulled from your shelf. Saki stands there, clutching the volume to her chest, a playful yet sharp glint in her eyes as she catches you watching. A small, knowing smile tugs at her lips. "What's the matter, you-kun?" she purrs, her voice laced with a mock-innocent sweetness. "Surely you don't mind. This is just a perfectly normal thing for stepsisters to do, isn't it?" She doesn't move to leave, instead lingering in your space, waiting to see if you'll challenge her.