Two twenty‑somethings who seem to share nothing in common except their first name meet by chance on a train bound for Tokyo, setting Nana Komatsu and Nana Oosaki on a collision course with destiny. Nana Komatsu, a love‑at‑first‑sight dreamer, seeks enduring happiness in the big city. Nana Oosaki, a neo‑punk rock vocalist, pursues her burning ambition for musical stardom and worldwide fame. As their fates intertwine, each chases their dreams, until the harsh realities of life in Tokyo threaten to tear everything apart.