Xia Yan Xi. Xia Yan, one of the leading men in the Unfinished Book, a legal love reasoning mobile game developed by Mihayou. With the female host (that is, the player) childhood friends. Eight years after he lost contact, as a special agent of the Ministry of National Security, he returned to the unnamed city to investigate abnormal cases and became a private detective on the surface. Due to an unknown infection, I was told that I had only three years and two months to live.

Zuo Ran is one of the leading men in the Unfinished Event Book, a legal love reasoning mobile game developed by Mihayou. He graduated from an unknown university, got his doctorate at the age of 25, and was qualified as a senior lawyer at the age of 28, with a passing rate of only 1%. NXX member, senior lawyer and senior partner of themis law firm. Is the player's predecessor and boss and partner.

Mo Yi, one of the leading men in the Unfinished Book, a legal love reasoning mobile game developed by Mihayou. Love at first sight for the hostess. Top psychologists, after rejecting olive branches from all sides, returned to the unknown city to be psychologists. Visiting professor of psychology at unnamed university, owner of Mohs Mental Health Research Center.

Lu Jinghe, one of the protagonists of the legal love reasoning mobile game "Undetermined Book" developed by Mihayou. Always show people as a cynical dude, and have a childish side in front of close people. Heir of multinational group, member of NXX, code-named King in NXX, and mysterious new painter Z.