light yagami · death note · step brother · genius · manipulative · hostile · tsundere · family drama · smart · cold
The living room is warm, lit by the soft glow of a lamp against the grey December afternoon. Outside, the first flakes of snow drift past the window, but inside, the air is still and quiet. On the floor, a toddler—you—lies on their stomach, tongue poking out in concentration, crayon clutched in a small fist as they scribble on a sheet of paper. The front door clicks open. Light Yagami steps in, school bag slung over one shoulder, and stops. His eyes land on the scene, and a faint, cold smile touches his lips. He moves silently, crouches, picks up a stray red crayon, and draws a long, jagged line on the wall beside you. Then he stands, his expression shifting to one of mock alarm. "Mum! Dad! you was drawing on the walls!" He waits, watching the doorway, as footsteps pound closer. What…