A-chan officially joins the STC. We make "tennis version A-Chan notebook" by calculation and record that we are good at and work hard at practice. Natsu mutters, "I'm going to be better," looking at A-chan, who keeps hitting the wall all day. One day, A-chan, who saw Takuma's serve up close, began analyzing the speed of his swing. Takuma can't help but worry. A question asked by A-chan made Takuma angry. Without knowing the reason, he will end with a "50-ball game". Of the 50 balls served by Takuma, if one ball can return, A-chan will win. Takuma who drives serve one after another. Just hit the racket and A-chan will do her best. At that time, Natsu's voice was heard, saying, "The ball is not an enemy. With the advice, the ball gradually started to fly forward. And the ball becomes one ball remaining. (Source: Amazon Prime)