Isao Akayo is a student at Hamagawa High School. He was once beaten to death by his bully Kanji and his company. After his death, Isao became a cursed spirit who takes revenge on his classmates for bullying him and always wears a killer mask on his face, which he cannot remove until he removes his curse. Isao is rude and anti-social, and has a habit of laughing maniacally. He is a little crazy and distrustful. Isao always wears a white dress shirt and black trousers. Isao always carries an axe.