It seems strange for it to be all a 10 but I'm not the kind of persons who criticizes like "the art is good,but sometimes lacky when you look at a background" or "it's the same concept of story as many other mangas that are better than this",I just want to say that reading this manga means you will be hyped to read every new chapter and say "i feel bad that I have to stop now".
This manga deserves more and I hope it will receive an anime adaptation too in the future.
It's one of the best mangas I have ever read,it got my adrenaline pumping,goosebumps, and all that great stuff one wants from a manga.
Hope you'll follow my advice,just know you won't regret it.