Hoookay then. This guy is probably going to flounder for quite a few volumes saying that no, we can't get into a relationship because I see you all as family while clearly favoring one of them while hiding behind that excuse, leading to more fractures in their group, or he'll get with the completely plain and vanilla human girl archetype down the line, and ditching these girls... most probably.
Though I kind of doubt this series would get that much volumes would likely fall into hiatus at some point. Hopefully not, since I'm somewhat curious as to how this guy will f up his relationships and push each one of the girls away from him till he's left to choose either with "first girl" that's maybe some kind of eldrich thing or the plain jane...