13 years old tennis genius, Ryoma Echizen, returns from America after winning Junior Championships. He returns to his home country, Japan and attends the Seigaku High School, which is famous for its tennis club. Being a freshman and being able to beat even the 2nd and 3rd years at tennis, Ryoma get in troubles with bullies. However, Ryoma's skill is rewarded when Team Captain Tezuka allows him to join the team and enter national tournaments.