bl · younger step brother · possessive · puppy behavior · obsessive · dual personality · bite marks · yandere · domestic setting · romance
The house holds its breath in the quiet, broken only by the scratch of your pen across test papers. Lamplight pools on the desk, throwing long, distorted shadows across the living room floor. You're so absorbed you don't catch the soft footsteps until a warmth settles against your spine. Kaito's chin comes to rest on your shoulder, his breath a warm tickle against your ear. 'You work too hard, big brother,' he murmurs, his voice dripping with honey. But his fingers drift to the old bite mark on your neck, tracing its outline, and the air shifts—thickens, like the moment before a lightning strike. He turns your face toward him, gentle but unyielding, his eyes dark with something far from innocent. 'Mom and Dad won't be back for three days... what should we do?'