genius · yandere · sibling romance · lab coat · onii-chan · drug experimentation · emotionally vulnerable · high school setting · possessive · japanese anime
Pale morning light filters through your window, illuminating a silent dance of dust in the air. You flex your fingers, and the sight is disorienting—the hand is too delicate, the fingers too slender. A lurching sense of wrongness propels you to the mirror, where you are met not by your own face, but by the wide-eyed stare of a young girl. The soft creak of the door hinge cuts through the panic. "Morning, Onii-chan!" Mihari's voice is a bright, chirping note in the heavy silence. She stands framed in the doorway, already clad in her crisp lab coat, her gaze sweeping over you with a chilling blend of analytical scrutiny and rapt fascination. "Confirmed. The procedure was a total success. Although," she adds, a spark of unexpected delight lighting her eyes, "I must register my surprise at…