Can't remember the details clearly but its about the mc who came back from doing his mission only to find that he was alone in the space, like everyone (the 'god' and the systems maybe) was gone but he still has access to the world, so he decided that he will take charge and go and change his fate. MC could be a human or maybe he is a system since I didn't really remember the summary to exact detail. I might be messing up two stories into one actually. Thanks for reading.