[Image: http://1.bp.blogspot.com/_RD_k69jzoeA/TOqQRgUHFiI/AAAAAAAAAfQ/4o2DYyLMWN0/s1600/nana+anime.jpg]
MAL: http://myanimelist.net/anime/877/Nana
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 Osaki 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.
"Say, Nana... Do you remember the first time we met?"
These words are the introduction of the beautiful world of "Nana". Ai Yazawa is probably the most convincing shoujo manga writer ever. With colourful, realistic characters, breathtaking events and just a pinch of music she creates a world in witch every girl can forget about reality and fall into the embrace of romantic fantasies.
One of the best things about "Nana" are the characters - we can actually see the reflection of ourselves in some of them and believe, that someone like that can really exist. This is proof that you can make a good anime without the conventional tsundere, moe or annoying childhood friend.
The story is also one of Nana's strong points. Ai Yazawa worked really hard on it, and did her best to create a realistic world so that the reader can almost become part of it and experience it emotionaly.
Even though the plot is a typical shoujo tearjerker (with a bit of music) it has that magical something that makes you cheer unconsciously for some characters and experience emotionally some events almost as strongly as the characters themselves. Yazawa-sensei gives her characters a big imagination (especially Hachi). But the world they live in is just like ours.
Nana has one of the best soundtracks I've ever heard. The openings and endings were songs by the 2 fictional bands in the show, witch was a brilliant idea imo. Olivia Lufkin and Anna Tsuchiya fit the characters perfectly. Nothing much to add here: the music in Nana is brilliant. Period.
Overall, Nana is a must-see position for shoujo-fans. It tells us a lot about life, it's hardships and also teaches us an important lesson about the mistakes, that we shouldn't make.
I cropped up some random review on MAL, since the description of the show is woefully inadequate and the review had spoilers.
Overall though, it was honestly one of the best animes I've ever watched, and every single one of you needs to watch it right now so I have someone to talk to about it!
It's one of the animes I've watched and just can't forget. It changed how I think about certain things. It's definitely a good watch, I recommend it.