It's dubbed!

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 Oosaki 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.