Well, this manga is an odd one.
It sounds just like another survival manga, the kinda "Everyone around me is dying" type. I can't say that it's totally original, but there's something special here- like the amount of cultural references, maybe it's the bizarreness level of this manga, or maybe it's just the fact that it's so unexpected! I mean, I don't know what this is about this manga, but it's absolutely awesome. Go read
NOTE: Because of the many cultural references, there are so many translator notes, so if you're not up for reading those, don't start.