first let me tell you that this review contains spoiler !is it worth your money ? ( coins )It depends . If you enjoy stories without harem / romance / then go ahead . It's a gold .If you want a harem tag tagging along then it's a disappointment harem - no there isn't .I'm the type of guy who doesn't read novels if it doesn't have harem tag .. no harem ? drop ! . but the author doesn't come clean about if it contains harem and to find out your self . Remember he doesn't say that it doesn't contains harem and to find out your self .. which is a bait to capture more readers .Personal review - 1 -200 chapters all the mc does is train ,eat , sleep , have a mental breakdown , and the cycle repeats itself . I thought of dropping couple of times but went forward anyway . It's quite irritating at this rate .after chapter 300 it's quite readable and story continues to get interesting . And it made me forgot all the frustration I had previously .I dropped at 402 chapter after the protagonist wants to share about orgin of him and his teacher ( they are from earth ) and about the god to others . It destroyed the full meaning of the story for me and I don't like when the protagonist goes around telling others about his secret / Trump card / system / god / reincarnation etc .. what's the point ? it's the only thing that makes mc unique and, I think people who argue about it are people pleasers . whatever is the case I don't care anymore . . natural review- extremely well detailed story , slow I mean extremely slow story till 300 chapter and later story takes off .Interesting world background .Good updating stability .well though story and characters development .if you can handle till 300 chapters . .. you won't be disappointed .