Mikado, an employee at the bookstore, had a proclivity towards encountering eerie entities. Despite ignoring them, he crossed paths with Hiyakawa, an exorcist, which changed his life. Mikado was coerced into assisting with exorcisms and grappling with the uncomfortable sensation that exorcising entities with Hiyakawa was pleasurable. As they became engrossed with these cases every day, they chanced upon a ruthless homicide investigation.