Nagisa Aragaki's experience at the National Junior Badminton Tournament had a lasting impact on her. After losing 21-0, she struggled to cope with the shame, taking out her frustration on her high school badminton club. Under her intense training regimen, some team members quit while others were pushed to their limits.
Kentarou Tachibana, a seasoned Olympic-level player, took over as head coach, bringing Ayano Hanesaki, the girl who defeated Nagisa six months prior, to the club. However, Nagisa soon discovered Ayano was not the rival she remembered, but a complex individual trying to distance herself from badminton.