Resolved I just remembered

[Lasterton]

A story about a guy who lives in a world that has experienced an apocalypse and has gained powers. He ends up fighting the one who started the apocalypse but dies and gets sent back in time to a different world that hasn't experienced the apocalypse yet. He ends up becoming friends with the person who originally started the apocalypse.

 

[MissPaige36]

A story about a guy who lives in a world that has experienced an apocalypse and has gained powers. He ends up fighting the one who started the apocalypse but dies and gets sent back in time to a different world that hasn't experienced the apocalypse yet. He ends up becoming friends with the person who originally started the apocalypse.

What site did you read it on? Is it English? Or perhaps Chinese, Japanese or Korean? What was the mc's name? Any romance in it?

 

[Biggest-Kusa-Out-There]

I think I read a bit about what you're talking about. The story had a system right? And people had powers beside the system? And the mc was a leader kind of person for some reason?