The King of People in the Net: the Beginning of the Game for Tezuka

When you wake up, go through the king of nets!
And became a first-year student of Qingxue Middle School!
In the face of Ryuzaki's rule of "you can't play in the first year, you can only pick up the ball", Lin Xuan wanted to break it, but due to his limited strength, he didn't have the confidence to act...
fortunately!
That afternoon he will activate the sign-in system!
Sign in for one day and get: Power upgrade to Kanto level!
Sign in for five days and get: Move like thunder!
Sign in for ten days and get: Light Shots!
......
When the strength has completely entered the national level!
Lin Xuan led Tezuka and Fuji to start a revolution about the future of the tennis club!