Tanjiro sets out on the path of the Demon Slayer to save his sister & avenge his family!
In Taisho-era Japan, kindhearted

It seems too good to be true. The Hyperbrain: a super intelligent computer that works by accessing the human brain. However, someone wants to use it for accessing people's minds & taking control of them! It can't be the Demon Headmaster, because he's been defeated. Hasn't he?