Tennis Era: All the Girls Who Have Used My Ball Say It's Good

Ball Girl+Tennis Competition+Return of the King Wu Yang, a Blue Star man who traveled to the world of the Prince of Tennis, was expelled by the will of the world and traveled again to a world where the racket can become a ball girl. In this world, even humans can awaken [tennis skills]. However, Wu Yang, who is not from this world, has no identity or tennis skills, so he is thrown into the seventh district as a beggar. Here he meets Long Ling, a top ball girl with "0" ball control. By chance, the two completed the contract, and since then, a pair of new stars have risen. Don't have [tennis skills]? I don't know if outspinning the serve, flying swallows returning to their nests, and brown bears falling into the net count? Are you saying that Long Ling, who has zero ball control value, is a useless ball girl? But isn't it always the player's business to control the ball? It doesn't matter to the ball girl, just practice more!