Edogawa Oto (Sugisaki Hana) is a student at Eitoku Senior High School. She was the daughter of the company president of Edo Quality, a large cosmetics manufacturer, but her life completely changed after it went bankrupt. Her father (Sorimachi Takashi) now works away from home and she lives with her mother Yukie (Kikuchi Momoko). Oto works part-time at a convenience store to support the family and is in charge of all the housework. She is supposed to marry her childhood friend Hase Tenma (Nakagawa Taishi), who is the popular student council president of the rival Momonozono Academy, when she turns 18. But the condition is that she has to attend Eitoku Senior High School until then.