Two girls share the same name, Nana, but couldn't be more different. Nana "Hachi" Komatsu follows her boyfriend to Tokyo in hopes to make a new start, while Nana Osaki, who arrives in the city at the same time, is a punk rock beauty who has an ambition to make it big in the world of rock and roll. Although these two young women come from different backgrounds, they quickly become best friends.