When Yakko Mitamure was young, her mother passed away, leaving Yakko alone with her father. In the present she works at her father’s restaurant and attends evening classes at a university, but her life changes forever when she runs into Hashizo Kato and his macho and pancake-loving cat Juliano. Hashizo’s brother Go is the lead singer of the band Bee Hive, and soon ends up becoming a love interest. However, Yakko also has feelings for Bee Hive’s keyboardist, Satomi. Her heart can only belong to one – a fact that she will soon come to understand as a series of events unfold…
As a member of a musical duo on the verge of making it into show business, Shindou Shuichi has a lot on his mind -- especially since he writes the songs for his Bad Luck band. His life gets no less hectic when he bumps into Yuki Eiri, a successful yet cynical author extraordinaire, who immediately insults Shuichi’s lyrics upon reading them. Seeking him out to demand an apology, Shuichi nevertheless sees other facets of Eiri’s personality. Can he accept the fact that he might be developing feelings for the novelist who discredited his work on their first meeting?
Shuichi and the rest of Bad Luck are back, and better than ever. Having reached the heights of fame in the music world, a new opportunity is on the horizon: the Tokyo Bay Music Festival! Bad Luck is set to perform, but so is Nittle Grasper, their supreme rival. What's worse is that Yuki, Shuichi's lover, has written the lyrics for Nittle Grasper's performing song! With low spirits and heavy hearts, can the gang pull together for one last song to prove to Japan they're the best band in the world?
Nana Komatsu is on her way to Tokyo; now she can finally be with her boyfriend after a year of dating long-distance! On the train there, Nana Komatsu meets Nana Osaki – a girl who shares her name but seems to be everything Nana Komatsu is not; cool, street-wise, and a punk rocker. The two hit it off and spend the entire journey getting to know each other, but when they get to Tokyo, circumstance separates them seemingly forever. However, fate is not finished with these two. Whilst hunting for a place to live the two Nanas again cross paths. They decide to share a flat and become best friends in no time. Nana K. must learn to be independent and mature, while Nana O. works on becoming famous with her band; but together, they will learn about love and loss, and the growth that comes with it.
Both anime are primarily shoujo romance which also portray the story of a band trying to make it big. You'll certainly like Nana if you liked Ai Shite Night because it also involves angsty, confused romance and even angstier rock music; however, it's also better because it portrays more mature and complicated characters and generally has better comedy, drama and animation. It's important to mention that, unlike Ai Shite Night, Nana is incomplete (albeit still a fantastic experience).