Ai Yazawa's NANA is a beloved shojo manga known for its complex characters and emotional arcs. The series follows two young women, both named Nana, who become best friends and roommates in Tokyo. The cover art of each volume visually represents their journey together. Volume #5 shows Nana and Hachi enjoying a day out, while Volume #7 depicts them checking train timetables. Volume #17 shows them at a karaoke before missing the last train, symbolizing their growing distance. Volume #13 shows them standing in the snow, highlighting their struggles with relationships. In Volume #20, the duo faces Ren's substance abuse issues. The series ends in Volume #21 with Nana and Hachi walking home hand-in-hand for the last time, reflecting their bittersweet journey. Volume #1 introduces Nana Osaki alone, setting the stage for her eventual connections with others.