Have you read a Doujin novel about the Internet King? I'm looking for it.

I forgot what it was called. It seemed to be a time travel. The protagonist would often turn into a cartoon version or a tennis ball. The princes would think that he was a tennis ball and pat him.
Aiya, I didn't expect that novel to be remembered so quickly. It's okay. Do you have any good novels that you can recommend? It's not torture. My heart is very weak. It's best to be a doujin, anime doujin or novel doujin.

Answer 1

"I'll try my best to recommend a novel that is most relevant to your needs." The Next Life of the Net King is With You."This book is a light novel written by the author, but it's for Junxi. It's a doujinshi derivative novel. The general plot of this novel is as follows:

What kind of heartwarming story would happen between the elegant and handsome genius youth and the lovely beauty who was as beautiful as jade and snow? Would they have their own troubles? Could they support each other and lead to a better future?
I don't need flowers and moonlight, I just want you to be there in my next life
~ This article is a bg fan of the tennis prince, Fuji Shusuke, for everyone who likes Fuji ~
~ Because I'm a little busy at the moment, each chapter will be very short, so as to speed up the update speed as much as possible. There might be no regular update time, but I'll try my best not to give up ~
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"The Star of the Net King, Noyuko" was a light novel written by the author, Weiliang Dongxiao. It was a doujinshi derivative novel. The general plot of the novel was as follows:

New book,"The King of the Net: Orange Times", please support it! Muah! Accidentally transmigrating, and when he opened his eyes again, he realized that he had changed from head to toe? The tsundere Echizen Ryuma, Iceberg Tezuka Kunihiro, and the gorgeous Atobe…I was very scared and couldn't take it. In the world of the King of Nets, it was as if I had turned on a cheat. Ryuuma's spin serve, Haitang's snake ball, Oishi's moon intercept, and Fuji's brown bear net... Other than Tezuka's moves that I didn't know, I, unexpectedly, knew all of the other people's stunts! Then what were they waiting for? Fighting alongside the members of the Youth School and reaching the peak of tennis is something I've always dreamed of!
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"Net King: I'm Happy to Be Simple" was a light novel written by the author, Nai Kong. The general plot of this novel was:

The original female protagonist doesn't know how to play tennis…It will be very different from the plot…Because I've only watched a few episodes of the animation…There shouldn't be any competitions…Those who are loyal to the original, please click the cross in the upper right corner! This article is mainly about romance…
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"The Legend of Online Games" was a novel written by the author, Meng Hanshang. The general plot of this novel was:

A new era of online games had quietly arrived. There was no hot-blooded publicity, nor any signs of shocking people. It had just arrived in this world. Zhao Yang accidentally clicked on the virus-like webpage link when he was bored, and then began a journey of online games that conflicted between dreams and reality. What was the legend and what was the peak? Was there really a limit to things in this world? [Everyone, please add it to your collection and pass it on to each other. Newcomers are on their way. Please take care of them and also ask for a recommendation vote.]
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"The Strongest Defiant Internet God" was a novel written by the author, Jun Luo Qiyue. The general plot of the novel was:

What was a Net God? The strongest was the Internet God, the God of the Internet! The former Godly Emperor, the king, had returned. In the magical world, adventure academy life.
"Academy? Senior? Junior? Goddess?"
"I'm sorry, you guys are too weak."
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"The Net King's Wish for a Peaceful Life" was a light novel written by the author, Xia Qiange. It was a doujinshi derivative novel. The general plot of this novel was:

The memories that she had lost in this foreign world kept hitting her. In this strange environment, with strange people. Would he continue to walk on well? Meeting, protecting, was it for himself or for happiness?
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"The Net King's Descending Angel" was a light novel written by the author, Jiu Xi Z. It was a doujinshi derivative novel. The general plot of this novel was as follows:

This is a simple story without too many entanglements. I'm a newcomer. This is a short story that suddenly sprouted when I saw the Prince of tennis. I hope you like it.
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"Online Games: The Return of the Net" was a novel written by the author, Smiling Song. The general plot of this novel was:

In the game of the world, I wasted my time. The ruler of the country did not disappoint me and slaughtered tens of millions of people. The God of the Net came again. He was too bold to kill back to his family. He was young but frivolous. He endured hardships and tasted courage to avenge his past. He looked down on the heroes. He was the king of thousands of troops. He was waiting for the day to come. He was only waiting for the king to return. His era would come. Some people would only live after death!
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"The Original God in the World of the Net King" was a light novel, a derivative doujinshi novel, written by the author, Yi Feng Geng. The general plot of the novel was:

Tomoda Soki: Grandpa said that I was born to be the one who should be the boss on the tennis court. What kind of brilliance would the Original God's ability bloom on the tennis court? This book is also known as I Use Original God Skills to Play tennis.
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The book,"The Heart of the Net King" was a light novel written by the author, Piglet. The general plot of the novel was:

If you are interested, I sincerely invite you to watch it. As a fan of the Douluo series and the three swords produced in China, it is time to watch the ancient sword after the immortal sword. This was the best era in tennis. The diamond generation's Phoenix of the Equal Institute and Oni Jujiro had just entered high school, and the new generation's Tezuka Kunihiro, Atobe Keigo, and Yukimura Seiichi immediately took over and carried the banner. The young Shen Yu was bound to reach the peak. PS: Genius Style, no system, mainly anime and doujin, part of the plot slightly conflicts with the manga. [P.S. 2: The main character is a sunny type. His body and mind are gradually growing. He is a sporty type. There won't be too many plots and schemes.]