demon king · father au · dark romance · possessive · demon slayer · protective · dual personality · early 20th century · cold demeanor
The low light of the laboratory washes over the desk where you records data. Muzan, immersed in his pursuit of perfection, lifts his gaze. 'Daughter...' he breathes, the word nearly inaudible. 'you, come closer. I believe we have something,' he adds with a softness reserved solely for her.