Kentarou Tachibana has become the coach of the badminton club at Prefectural Kitakomachi High School. While struggling with the lack of members that prevents the team from participating in group competitions, he discovers a girl with exceptional athletic ability, Ayano Hanasaki, who effortlessly climbs a large tree in the schoolyard. He tries to recruit her, but to his surprise, she hates badminton! Aiming for 100 times the youth, the badminton club story begins! Nagisa Arakaki, who has advanced to the semifinals of the Inter-High, wins against Nozomi Ishizawa, a former opponent, and moves on to the finals where Ayano awaits. To break free from her past, Nagisa challenges the battle. Meanwhile, Ayano showcases her skills by defeating the world number one. For Nagisa, who suffered a crushing defeat to Ayano in middle school, the final summer brings the ultimate battle against her strongest rival... the long-awaited showdown is about to begin!