Upon relocating to Tokyo with his sisters due to their father's job transfer, Yuu Haruna's life takes an unexpected turn when a chance encounter with a high school girl named Fuuka Akitsuki leads to a series of misunderstandings. Despite their rocky start, Yuu and Fuuka find common ground and bond over their shared passion for music. Together with their friends, they embark on a musical journey, forming a band and venturing into the competitive music industry. As Yuu navigates this new chapter in his Tokyo life with Fuuka by his side, their musical aspirations intertwine with the complexities of youth and friendship.