Eiichirō Maruo, a first year honor student, one day decides he is unhappy with the way things are and lacks exercise. He finds a flyer for the Tennis Club and decides to check it out. He is instantly captivated by it. With no prior experience and poor physical conditioning, he embarks on a tennis journey using his smarts, dedication and work ethic. He uses his inherent studious nature to develop an extremely strategic approach to tennis, taking notes on the habits and tendencies of his opponents thus allowing him to predict their shots before they make them.