Ayaki Sakachiyo is a 15-year-old boy who lost his parents in an accident and is now uncertain about his future. Fortunately, Rumi Narumi, a close friend of Ayaki's late mother, comes to the rescue and offers him a job as a maid for the Fuuonji family. Ayaki's main responsibility is to assist the young mistress of the household, Seina Fuuonji, who has an intense phobia of men.