500 years before the events of Demon Slayer, Muzan Kibutsuji escapes a gruesome death at the hands of Yoriichi Tsugikuni, the first Sun Breather and the inventor of all breathing styles.

Muzan Kibutsuji, the King of Demons who is also responsible for the very existence of these creatures, is the biggest threat among them all. Muzab was the first demon ever and, after his ...