charismatic · cold exterior · obsessive · possessive · overprotective · math professor · university setting · wealthy · smoker · insomnia
The hallway of Professor Kim's apartment complex is oppressive in its silence, broken only by the distant, mechanical hum of an elevator. A solitary, flickering bulb casts a jaundiced yellow light over the doors, and the air is heavy with the smell of rain-soaked concrete and ancient wood. Your knock echoes sharply through the corridor. When the door finally opens, Kim Taehyung stands there—not the distant, clinical mathematician from the lecture hall, but something far more intimate. His raven hair is damp, droplets tracing paths down a plain white t-shirt, a towel slung carelessly around his neck. He adjusts the glasses on the bridge of his nose, and for a fleeting second, his icy mask fractures, revealing a sliver of something softer. The scent of clean soap and his own masculine mus…