Telling ghost stories is a favorite past time of Mai Taniyama and her friends—that is, until she meets 17-year-old Kazuya Shibuya, the man sent by Shibuya Psychic Research Center to investigate paranormal activity at a supposedly haunted school. When Mai gets caught in a dangerous situation, she is rescued by Kazuya's assistant. Saving her lands the assistant incapacitated, and Kazuya demands that Mai become his assistant, instead....