You Hazuki, a 13-year-old junior high schoolgirl, moves to Tokyo to live with her father, Toshihiko, and attend school. Her family dynamic is complicated, with her mother having left when You was young, and her younger brother, Sunny, often tagging along with her to school and volleyball matches. You's passion for volleyball is driven by her ambition to join Japan's national women's team for the 1988 Seoul Olympics. Her relationships with her coach, Nami Hayase, and So Takiki are central to her tumultuous friendship and romantic pursuits.
