Hello. I read a novel whose title I forgot. It was a yaoi novel. The story took place within a system where the teams were given tasks on different topics (e.g. history, math, foreign language) for this they were given points and to get out I think 5 had to be completed. One of the protagonists was a player who later turned out to have previously helped the system as a "supervisor." He was also accompanied by his grandson's brother and uncle. The other protagonist first acted as a supervisor, and finally it turned out that he was a player when the first protagonist was the supervisor. The two of them knew each other in the past and tried to destroy the system, but failed, so the first protagonist lost his memories. Throughout the story, he slowly recovers them and they want to try to destroy the system again. I remember so much. Can anyone help me with the title of the novel? To put it bluntly, it was Chinese. Thank you ^^