Leaving their respective hometowns, two young women sharing the same name are united by their quest for fresh starts. Both have their sights set on Tokyo: Nana Komatsu dreams of a happy romance, while Nana Osaki strives for a successful music career. The former is cheerful and friendly, yet her naivety has led her romantic life astray until she meets her reliable boyfriend, Shouji Endo. Undeterred by Shouji's decision to study in Tokyo, Nana works hard to save enough money to follow him there. Meanwhile, her namesake is a solitary punk vocalist whose passionate romance with her band's bassist, Ren Honjou, ends abruptly. Despite being heartbroken, Nana looks ahead bravely and travels to the capital with the ambition of becoming a recognized artist. Shortly after arriving in Tokyo, the girls cross paths again due to an unexpected coincidence that ultimately leads them to share the same roof. As they grow closer, the two strive to support each other amid their struggles to build a future for themselves.