A mysterious pentagram appears at St. Moses Academy, releasing the demon Mija who aims to awaken latent desires within those she encounters. Investigator Sara Tadeshina arrives with only vague clues to guide her inquiry into the strange events. At the same time, student Mayu is drawn into Mija's domain and begins to display an altered demeanor that alarms her admirer Kotaro. He follows her into the source of the disturbance, setting the stage for Sara's urgent attempt to reach them both.