Shinichirou Asano is plagued by terrible luck. His parents abandoned him and fled to Europe, leaving him with barely enough money to support himself. To pay rent and keep a roof over his head, he must work. Unfortunately, he was just fired from his last job, and as a high school student, he has few other prospects. One evening, on his way home, he is attacked by a centipede monster. Shinichirou is saved by a mysterious girl wielding a bow and arrow, whom he later identifies as Sakuya Shimazu, a beautiful student at his school. However, when he later assists an injured girl, he uncovers two facts. First, the injured girl is not human but a nekomata, a two-tailed demon cat. Second, Sakuya belongs to a family of exorcists who have protected humanity from rogue monsters and spirits for generations. Because Shinichirou was responsible for releasing the nekomata, Sakuya enlists his help in recapturing the demon, marking only the beginning of his relationship with her. It turns out the Shimazu family needs a housekeeper, and Shinichirou happens to excel at cooking and enjoys cleaning. It may not be his dream job, but if it pays the rent and puts food on the table...