Soooooo, It's not one of those SAO, Log Horizon, Btoom game style isekaies this isn't even a MMORPG THE SYNOPSIS IS LITTERAL BAIT FOR YOU. THIS IS LITTERLY AMOUNG US and Silent Hill, the first chapter did catch me off guard very unexpected but that's it after chapter 3 or 4 it becomes VERY predictable, they straight reveal everything too soon, it could of been a Editors choice to end it fast who knows. Honestly this was just a mediocre read, the art itself was actually pretty good although that alone can't save this story I mean I've read hentai plots with more substance than this, howeverthere was mild enjoyment, but not really.
There is symbolism to take from this but honestly It's not necessary.
if you want something similar play silent hill or read GANTZ, or Btoom one of them.