The protagonist is Fujiwara Sawei, and the anime involved is "Spirit of the Game + Net King + Conan". Please forgive me if there are any corruptions. CP is uncertain.
Zuo Wei has his own body at the cost of losing some of his memories. In other words, there is no memory of being with Shindo Hikari. Sa Wei only has memories of the Heian era and the Torajiro era. Some modern memories have been added. Zuowei's current identity is the second young master of Japan's top Fujiwara group. He grew up in the UK and has just returned to China. Because he didn't like his family, Fujiwara Eikawa (grandfather) lived alone outside in the name of training.