A chance meeting on a train to Tokyo sends two girls named Nana on a collision course with destiny!

Nana "Hachi" Komatsu hopes that moving to Tokyo will help her make a clean start and leave her capricious love life behind her. Nana Osaki, who arrives in the city at the same time, has plans to score big in the world of rock'n'roll. Although these two young women come from different backgrounds, they quickly become best friends in a whirlwind world of sex, music, fashion, gossip and all-night parties!

Hachi hasn't seen Nana or the rest of Blast since she moved in with Takumi, and Shin and Reira's joint birthday party seems like the perfect chance for a little reunion. But Takumi is furious at Hachi for crashing the event, and she is forced to choose Takumi over Nana one more time. But was this Hachi's last chance to get back in Nana's life?