The setting is a little interesting. With the demons, dungeons, and magic you'd think it would be more of a fantasy setting but the clothing seems pretty modern. I wonder if they have cell phones.
I imagine the demons as semi-modern interlopers on a more primitive fantasy world. The have some raw technology advantage and some magic-as-technology-replacement. For instance, the lights in vol. 2 page 7 may be gas lighting or some kind of magical component that gives off a low glow indefinitely. Their tech advantage is not overwhelming, but it's enough to make everyone nervous leading to minor conflicts.
Perhaps humans are seen as a resource used to create a population more suitable to this world, or perhaps they just find them particularly enjoyable in bed. Either way, human/demon half breeds like mistress are common in their society.
Due to the site layout on the front page (which has always kind of confused me as to the order of posts), I just noticed that this is actually a double page with the last one! The chest of drawers and the window line up perfectly! That's an awesome touch!
