Cheat Upgrader

For two years, I have been playing alone In the past two years, countless struggles After two years, he was finally liberated from this damn mission. But just before liberation, due to an error in the game system, he inexplicably traveled through time. When a reminder sounded in his mind, his life was destined to be different. Fighter group: 290642185 (stepping stone, the name of the protagonist in the book, only for book friends)