Divine Kite, Dark Fish in a Nutshell

Science fiction (sure), one soul and two bodies, the fantasy color is to pave the way for the next book, there is a system, but the protagonist's technology mainly relies on the memory of the previous n lives, the system = mascot, it should be a relaxed and funny style The second male lead is reborn "Dissect the world and you'll get nothingness." "This universe is like a predetermined program, step by step and following rules." "As long as you master the code in the program, you master the rules of the universe." "So" "How do you view the world?" "I want to" "No matter what the world is giving us at the moment, it is always true." "Want to know the truth about the world?"...