Twelve-year-old tennis prodigy Echizen Ryoma returns to Japan after winning back-to-back junior tennis championships in America. He enters the Seishun “Seigaku” Gakuen, one of the seeded schools in the tennis nationals. Despite still being a freshman, Ryoma manages to become a regular due the skills he acquired from constantly battling his father, Echizen Nanjirou, a professional tennis player. With the goal of winning the National Championship, the Seigaku team learns about friendship and teamwork and develops new and complex techniques. Along the way, Ryoma finds his own playing style and discovers the true meaning of tennis.