With her father away on a business trip overseas for a week, Hanamiya Amu, a professional maid, is hired to handle housekeeping and care for the family's only son. The son, introduced as polite and kind at first, suddenly reveals an erotic side once his father is gone, repeatedly making bold moves on the maid. Surprised by his drastic change in behavior, Hanamiya struggles to maintain her composure, striving to respond with the poise and perfection expected of a professional maid while being toyed with by the son's growing desires. As his actions escalate further, the relationship between them begins to shift into something entirely new.