In the world of Demon Slayer, Muzan Kibutsuji is recognized as the king of all demons. All the demons are extremely loyal to him and fear his anger. Muzan is the first demon and has turned ...

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.

As the Demon Slayer Corps members and Hashira engaged in a group strength training program, the Hashira Training, in preparation for the forthcoming battle against the demons, Muzan Kibutsuji ...