Hmm so they're colonisers and simeon and his brother are in security and military positions ... I don't quite like that. Plus as clever as marielle is she really showed her ignorant side in this one - simeon was supposed to be the critical voice when they talked about immigration and really how she acted grated on me too, but ig this is the point where she'll become more conscious.
I also liked that simeon was self-reflective about himself. 
But all in all, these sort of pseudo european historical manga really like the imperialist coloniser setting. I don't see commentary on it often. I think I'm only thinking about it here cause they actually mentioned "illegal" immigration, the colonial rule trying to keep the former colonies under check, the poverty around the red light district. I did change my mind, I'm glad it's spoken of, even if just a little.