For me I read from the start as to not get anything confused but if you don’t want to do that I recommend starting from the point where they just enter the neutral zone because from then on some stuff will be happening that isn’t in the manhwa and might confuse you if you don’t start from there
As a gay virgin, this is incredibly terrifying but a good concept tho just that it's so fucking terrifying oh my god I think i'm scarred for life
hahahahahaha XD