In the room of the Story Hotel, Hina (Rina Minami), who is wearing a blonde wig and a gothic lolita, is accused of having an M-shaped spread by Masukawa, the director of the nursing care company. At the moment Hina is strangled and feels cheerful, Masukawa's view is distorted. When Masukawa looked around, he noticed a mysterious figure. Miki (Yukine Sakuragi), an abbreviated name for the Research Institute for Bizarre Incidents, has started the investigation into the death of Masukawa. And at first, it was just an accidental death from a heart attack ...