Template System: I am Overpowered!

Our MC dies and gets to meet ROB - ROB : blah blah blah so it was partially my fault you died, so blah blah blah to compensate I'll let you reincarnate in another world with some gifts. MC : Can't you just turn back time and give me back my previous life? ROB : Well...sure I can. [Warning! This is a fanfic I am writing for fun, I cannot promise to update regularly, some people may find some parts of the story morally or ethically wrong.] [The cover doesn't belong to me]