The Ubuyashiki family curse stems from their bloodline connection to the first demon, Muzan Kibutsuji. Members suffer from a deadly disease, causing males to have short lives with skin resembling ...

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 ...