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Any Chinese or Korean light novel. 90% of them feature the main character travelin back in time with his current knowledge and starting again, or some other sort of"weird overpowered ability/knowledge which gives them an edge and makes them amazing.
Good examples include The King's Avatar (esports, will get an anime next season) or Reincarnator (very brutal end time story, but so much fun. Basically if the guy from SAW was a fairy and played with whole worlds instead of just a handful of people).