With his intimidating appearance and isolation, high school senior Kinichirou Imamura is misunderstood despite his lack of delinquency. On graduation day, he and his classmate Akira 'Aki' Fujieda undergo a strange experience, leading them to wake up three years in the past. Unable to return to their original timeline, Imamura decides to make the most of his second chance by immersing himself in high school life, starting with the challenging cheering club. However, adapting to the club's tough and lively president, Yoshiko Usami, proves to be a significant hurdle.