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 tells herself that she's got her eye on the future and her life with Takumi, but she just can't let go of the past and her friendship with Nana and the rest of Blast--especially Nobu.

And the tangle gets thicker when Hachi's wedding has to be postponed in favor of Nana and Ren's nuptials. Can Hachi handle another delay in her happily-ever-after?