The narrative tracks the life of Yuu Haruna, who has recently relocated to Tokyo with his sisters following his father's mandatory overseas work transfer. While walking to purchase dinner and browsing his Twitter feed, Yuu is suddenly collided with by a high school girl. Mistaking him for someone taking upskirt photos, she confiscates Yuu's phone, shatters it, and slaps him before departing, leaving him on the ground. It emerges that this girl, Fuuka Akitsuki, is also a student at the school Yuu is transferring to. In contrast to most people, Fuuka does not own a mobile phone; she even uses a CD player to listen to music. Over time, the two grow closer and resolve to form a band with their friends, aiming to enter the professional music industry. With Fuuka in his life, what will become of Yuu's new existence in Tokyo?