Nana is a beloved Josei manga series created by Ai Yazawa. It tells the story of two young women, both named Nana, who meet on a train to Tokyo and become roommates. The series follows their journey as they navigate the ups and downs of life, love, and pursuing their dreams in the big city. Nana is known for its realistic portrayal of relationships and its deep exploration of the characters' emotions. It has gained a dedicated fanbase and is considered a must-read for fans of Josei manga.