Eiichiro (15 years old), a high school student who was only interested in studying, wakes up to the depths of tennis at a tennis school he participated to resolve lack of exercise. Eiichiro, who was a complete amateur, made up for the physical disadvantages with his own observation and analysis skills and thorough wearing ball control. At the beginning, junior tennis players who weren't dealing with Eiichiro were inspired by his dedicated attitude and gradually changed their consciousness. A realistic sports anime that is a brain-smart character who aims to become a professional with a data-based strategy.