Echizen Ryoma, a talented tennis boy who won four consecutive victories in the JR. Tournament in the United States, was called back to Japan by his father, who was a famous figure in the tennis world, and entered the tennis club of the junior high school of Seishun Academy, a prestigious school. The coach of the tennis club is Ryuzaki, the senior of his father Minamijiro. The team members are headed by the director Tezuka Kunimitsu, deputy director Oishi Shuichiro, Fuji Shusuke who has excellent ball sense, Kikumaru Eiji who is good at acrobatics, Inui Sadaharu who is a thorough data system, and one Takashi Kawamura seems to be a different person when he picks up the racket, Takeshi Momotoshi is moody and happy, Kaoru Kaido is physically stronger than ordinary people... Although Ryoma's arrogance does not attract the love of his teammates, his superb strength makes people admire him with admiration...