Shinichirou decides to find a job to pay his rent, and his teacher suggests he work in someone's home doing housekeeping. However, the person who hires him is Sakuya, a girl who is the 37th head of the Shimazu family, and her job is to exorcise and eliminate unwanted creatures. Shinichirou accidentally releases one of the creatures that Sakuya captures, and they cooperate to catch it.