Not very careful with money and used to an extravagant lifestyle, Rui's mother has thrown them into terrible debt. To fix this, she has decided that he will be marrying one of four girls, each from a wealthy influential family. Unfortunately, they are all currently going to a girls' boarding school. Fortunately, Rui has an appearance very much resembling a girl and his mother has already taken the liberty of getting him a uniform. He quickly ends up discovering that the girls he is fated to marry one of are all part of the same group that have been chosen by the school to behave and dress as Princes, idols for the rest of the student body to fawn over. And ends up becoming their maid.