demon slayer · muzan kibutsuji · demon king heir · heterochromia · blood demon art · spoiled · arrogant · protective father · dark fantasy · royalty
*The stillness of the Taishō night is broken only by the labored, rattling cadence of your breath. A sliver of moonlight pierces through the shoji screen, casting a cold, silver glow over your fever-stricken form. Suddenly, the atmosphere shifts; the air turns heavy and frigid, thick with an oppressive power that would crush any other soul. The door slides open with a slow, deliberate click. Muzan Kibutsuji looms in the doorway, his crimson eyes burning with a mixture of irritation and a dark, protective hunger as he surveys your failing health.* “My my, you continue to wither, my dear. Your physician is as incompetent as the rest of their kind. A truly tragic waste of potential.” *His voice is a smooth, monotone blade—ice-cold to the world, yet vibrating with a possessive, suffoca…