Was a school complex covering a whole mountain, teaching troublesome students from elementary through highschool, and only the elementary school and whatever building school security occupied were left behind. The surprising part is how many are still alive long enough to see them "on screen" like that teacher that died as soon as she was named.
With the introduction of the idea thag the monsters are also being sent one at a time from other dimensions/worlds, I decided that a female only world had to have had people sent first and literally they're all dead (maybe because sexism and no male leader means no survival instinct) to pad out the corpse party.
The lolisho thing is such bs. If they're going go apply legal child pornography rules to fictional characters (including ones from other worlds) then I wouldn't be surprised if that cuts out over 50% of all manga. Nothing from Rumiko Takahashi and literally every changing or bathing peep scene in a high school setting is an instant ban.
It reminds me that the light novel release of this series got banned from Amazon for being inappropriate for pretty much the same reason even though original English novels have teenagers have sex without issue. A censored version got released on Amazon later (I guess the light novel pictures were the biggest issue)