Komatsu Nana moves to Tokyo, following after her boyfriend Shouji to gain a life she has always dreamed of. On a train bound for Tokyo, she meets Osaki Nana, the vocalist for the punk rock band "Blast", also moving to Tokyo to achieve her dreams of becoming a professional. Sharing the same name, the two of them perhaps through a twist of fate, ended up becoming flat mates in Tokyo, where together they support each other through each of their love lives and careers. Based on the manga by Yazawa Ai.