I got the impression there maybe other demon clans, so there could be a chance to see others showing up and wanting gain the power of Bl for themselves.
I do hope Hilda develops some sort interest in Oga, doesn't need to be some full blown romatic crap, cause I do have a hard time imagining that type of relationship here >__<
haha the whole turning into a demon thing is not hard to imagaine given he gives off that image now
really love this series!