Yuki is a girl from a rich family in Japan. She is to go to France while her twin brother is to be head of family and suty at Ouran, however her borther wants to be a rock star. Yuki ask to his grandfather (that hates her) for one year. If her brother is not selling a CD by one year, she will have to go to France. Then she attents to Ouran acting as her brother... who do you think she meets?