Ok, so the thing u have to understand about this novel is that the first 20 chapters suck balls. Yes, yes i know, why a 4? because the rest a quite good, some even excellent. The real reason the start is so bad is due to the lack of any back story, character building or world building; u basically know nothing except for the fact that the MC reincarnated, and he was a super strong dude b4 that, THE END. After that however the action, the plot and all the characters get better, more complex. All and all, if u can survive the boredom of the first few dozen chapters, ull find is a great read.