Mikako Kōda is an aspiring fashion designer who attends Yazawa Art Academy in Tokyo and is slowly building up her clothing brand, Happy Berry. Having been childhood friends with her neighbor, Tsutomu Yamaguchi, since infancy, Mikako reassesses her once-platonic feelings for him when he suddenly becomes popular at school due to his resemblance to the singer Ken Nakagawa and begins dating Mariko, a popular and attractive girl.