Kayo Tsukiyama is an editor for a fashion magazine. One day she is assigned to be in charge of a popular comic artist named Yuriko Hanazono (a woman's name), who turns out to be four brothers, Wataru, Osamu, Satoshi, and Hinata. Since that day, the bond between Kayo and the brothers are deepened little by little. What is going to happen to Kayo's life? What are the secrets of the brothers?