Oosaki Nana (aka Nana) is a strong-headed girl. The hard life she had been living mold her into one stubborn girl who is full of ambition. One year after her boyfriend left her to head to Tokyo to be a guitarist with some big shot band, Nana decided to try her luck in Tokyo in realizing her dream to be a punk rock band singer. Komatsu Nana (aka Hachi, Hachiko, Hachikou) on the other hand, is such a spoilt childish girl. All her life seems to be revolving around herself, her crushes and her heart breaks. Assuming to herself that she finally found that one true love, her boyfriend suddenly decided to move to Tokyo, telling her to follow him when he got into university later. One with her guitar and a pack of cigarettes, the other with her one luggage full of clothes, one trying to be a singer without the help of the boyfriend while the other is just following the boyfriend out of her spoilt personality, the two Nanas met each other in the train, make friends, and through a series of fortunate events, ended up sharing a flat together.