The author has done such a great job writing this story, he took the going back in time reincarnation thing and has done something truly different with it. The mc has so many great abilities, along with the brain to use them to their greatest potential. There is also a great use of the butterfly effect which brings unexpected events and results from the MC's actions which he never expected so it is very fresh compared to those other characters who know how everything happens and start freaking out when the timeline changes, while this MC notices that somethings have changed, but accepts it. My only regret about this story is that it is so good I read all 159 chapters (current amount released) in one day and I'm still wanting more hahaha.