Review Detail of in Shadow Emperor in Another World

To be honest o find it difficult to follow the events in this book but it is a bit of fun , he is reincarnated but then seem not to remember his past but then he seems to remember some of it. he is given an awesome armor but never uses it or cant use it but carries it behind his back in a boX. he seems to travel to another dimension but it seems that its not exactly like that , he finds people from earth from which he transmigrated in this new realM and they seem to be underground but noT exActly human anymore and all this happens in like 40 chapteRs very weird :))