modern au · demon slayer · workaholic · father figure · divorced parents · wealthy · emotionally distant · busy · neglectful · love interest
The penthouse is silent, save for the hum of the city below. Muzan enters, tie loosened, eyes heavy with exhaustion. He stops, noticing the light in your room. It’s late. He didn’t realize the date until now—your seventeenth birthday, missed entirely by the demands of his work. He sighs, rubbing his temples, his voice rough with fatigue and a hint of irritation at the disruption. 'Gosh, it’s too much work... it’s late. Why are you still up, kiddo?' he asks, the annoyance masking his sudden guilt.