Virtual Reality and the advent of Circlet Technology have transformed people's lives. A new competitive electronic sport, Circlet Bout, emerges, with schools dueling to determine the strongest Circlet Bout Club and player. One day, Yuuka Sasaki is mistaken for a challenger and battles Chikage Fujimura, Japan's best player, managing to tie the intense fight despite her inexperience. These events spark her passion for the sport, leading her to decide to become a Circlet Bout player. Two years later, Yuuka moves to Tokyo and enrolls in Union School, a place where she can practice and pursue her dream of fighting Chikage again. Upon arriving at Union School, she discovers that the club has closed. Her first goal is now to help the athletic Miyuki Kasahara and club manager Ayumu Aizawa reopen Union's Circle Bout Club and restore it to its former glory.