Mirai, a psychiatrist, enters the mental world of patients and uses the Neutron Community System, a machine that treats patients by eradicating their nightmares, and acts as a righteous heroine called Spirit Guardian, an evil secret that instills nightmares in peoples minds. I was fighting with the association succubus. - One day, Mirais patient, Masahiko, begins to experience mental anomalies. - Mirai enters Masahikos spiritual world in order to exterminate the nightmare that eats into Masahikos spirit, but it turns out that what controls Masahikos spirit is a monster far beyond her imagination. - Will Mirai be able to save Masahikos spirit? - [BAD END]