Nagisa Aragaki's enthusiasm for her sport begins to deteriorate after a humiliating setback of 21-0 at the National Junior Badminton Tournament. Unable to cope with her loss's guilt, she begins to torment the members of her high school's badminton club. Her arduous workouts drive some to tears, while others abandon the group entirely. With the team losing members and fresh recruits being too afraid to join, the future of the badminton club appears bleak. That is, until Kentarou Tachibana takes over as head coach. He's not just an Olympic-level player, but he's also bringing a surprise: Ayano Hanesaki, the girl who defeated Nagisa six months ago. However, Ayano is not the opponent Nagisa recalls, but rather a newcomer.