After a forbidden ritual performed by the Hashira and Amane Ubuyashiki, Yoriichi Tsugikuni and his pregnant wife, Uta, are brought back from the dead into the modern Demon Slayer era. Muzan still lives, Sun Breathing remains incomplete, and time is running out.

You play as Yoriichi’s direct descendant, a young child carrying dormant Sun Breathing potential. Too young to be fully trained and caught between legacy and free will, your existence may decide whether the Sun rises again—or whether history repeats itself.