Basically it's a 1:5, 1:15, 1:39 manga, but replaced women with succubi.
Well, they do have Incubi on their side and going by what this chapter unveiled so far I will assume the gender ratio is not so unbalanced as maybe in 1:39... maybe not even like 1:5. There's this panel
here. I see plenty of males on the train. Maybe a bit less compared to females, but that panel tells me incubi seem to have no need for special protection and they live more or less normal lives just like the succubi. Also Luisa, one of the four succubi at the Izakaya in the beginning, is married, so the concept of marriage also exists. And they reproduce. If they are separated from the human realm for a millenia and still have young succubi born recently, then the society seems to function.
Still, there's certainly a role reversal setting as well. It's the land of the succubi, not the demon world. Basically, I assume culture and society are matriarchal by tradition and incubi usually have roles and positions comparable to human women in pre-modern environments. Even if times have changed over there and gotten modern, incubi still have less political power and are usually not in economical top positions either. Same for the dark side, their mob is run by scary ladies...
Still, the setting is in a way similar to 1:39 because the Incubi of that realm seem to be less lust driven than their female counter parts or they manage holding back their natural libido better, who knows. So for Succubi, men with a big libido... and a big dick, preferably, are still what they desire. Let's just send R-18 Sou over there...
As for me, censoring... boo. Well, it's tolerable at this point and not like Blackbox-kun and Fog-chan are actually main characters of this one. But I still don't like that and wonder whether I'm gonna put this on my "gomi yama" or just forget about it. I'll have a look at the next one or two chapters before I decide. By the way, from the girls at the Izakaya I would probably pick Sofia, going by her features. And since she's behaving like that I would bet this one is actually the most deviant of them all.