Looking for a manga!

Hey guys! So I'm on the prowl for this manga that I read a while back. The story begins with a fairly attractive guy who's new in town and starts dating this beautiful girl. The weird thing is that the girl is actually some type of demon who's actually really ugly. She had some backstory where her whole family died in a house fire and she somehow transformed from a normal ugly girl to this crazy beautiful demon. She takes control of guys through sex and basically dominates the whole town. The protagonist dude is some type of exorcist who wants to save everyone from this chick. It sounds absolutely crazy but it's a real manga.

Thanks!