Betterman

Keita Aono's reunion with childhood friend Hinoki leads him into an abandoned underground amusement park, where she operates a strange machine. The site is linked to Algernon, an unexplained phenomenon associated with terrifying outbreaks of death and violence.

A rare ability allows Keita to pilot alongside her and join the investigation. As the dangers multiply, a being called Betterman appears, reshaping his body to meet each threat while leaving his true motives uncertain.