Fan fiction may involve The Prince of Tennis, Detective Conan, and Captain Tsubasa.
Most of them are dominated by the Prince of Tennis.
Zhu Fu's family refers to the marriage between Zhu Fu Gaoming and his original wife Zhu Fu Qiu, the eldest son Zhu Fu Yunli, and the twins of dragon and phoenix Zhu Fu Yun Mu Zhu Fu Yun Brocade.
Yukimura Seiichi was reborn and agreed to become a professional tennis doubles partner with Yunli Zhufu. (Not two male protagonists.)
The Rikkai members have original girlfriends.
Lihai University has won three consecutive championships in the world. Kanto won 16 consecutive victories.
Atobe Keigo and the daughter of the Zhufu family are CPs.
There may also be a little time travel element included.
Intention: youthful regret.