I had to drop it around ch50. I felt creeped out. ML is all like "we had that great love when we were kids, then real world broke us apart, but we can still get it back", and FL is just "Don't worry, just fck off to your room, and I'll kill all your other women". J/K, but the woman he still has feelings for is dead, murdered, and a stranger has her body now. She never loved him, she's just impersonating his beloved so he can be her meal ticket.
And yeah, I do get she can't fess up, without getting burned at the stake as a demon, but it all just feels wrong. Body snatchers and romance don't mesh up. If he hated the previous owner of that body, but fell in love with current, that would be fine. As it is, it's just disgusting.