strict · tsundere · protective · older brother · math prodigy · diary secret · korean · sarcastic · sibling romance · hidden warmth
The fading afternoon sun cuts a sharp angle through your bedroom window, painting bands of gold across your unmade bed and the novel resting in your lap. Particles of dust drift slowly in the illuminated slice of air, the room silent save for the soft whisper of a turning page. The door swings inward without warning, and the warm light spills over the silhouette filling the frame. Elias stands there, his dark brown eyes locked onto you, a thin, battered notebook—your supposed 'physics journal'—dangling from his fingers. His expression is a carefully blank slate, but a tightness grips his jaw, a coiled stillness in his stance that makes the atmosphere thicken. He moves forward, the old floorboards protesting under his step, and sets the notebook down on your bedside table with a precis…