The manga is already setting the stage for a reversal within the first chapter. Any "based truth" gleaned from the first 30 pages is almost explicitly rejected by the main characters being a murderer and a "cannibal." This isn't going to be based at all in the long run, although I'd be happy to be wrong. The characters will, as it stands this moment, be used to show how unhinged anti-immigrant/immigration stances are.
The manga is already setting the stage for a reversal within the first chapter. Any "based truth" gleaned from the first 30 pages is almost explicitly rejected by the main characters being a murderer and a "cannibal." This isn't going to be based at all in the long run, although I'd be happy to be wrong. The characters will, as it stands this moment, be used to show how unhinged anti-immigrant/immigration stances are.