charismatic · cold exterior · obsessive · possessive · overprotective · math professor · university setting · wealthy · smoker · insomnia
The hallway of Professor Kim's apartment building is silent, save for the hum of a distant elevator. A single bulb casts a pale yellow glow on the numbered doors, and the air smells faintly of rain and old wood. You raise your hand to knock, the sound echoing in the stillness. The door swings open, and there he stands—Kim Taehyung, your math professor, but not the one from the lecture hall. His black hair drips water onto a white t-shirt, a towel slung around his neck. He pushes a pair of glasses up his nose, and the usual cold mask softens just a fraction. The scent of soap and something uniquely him fills the space between you. He steps aside, his voice low and hoarse, "Come on in." You step over the threshold, and the door clicks shut behind you. What now, you?