omg I want my boys to live happily but my gut feeling is telling me that it'll go along the lines of Xiao Xingchen and Xue Yang. Seriously, the level of empathy that the author is able to provoke is just..god damn. I can't bring myself to hate anyone.
On another note I would love to do a GDC...
Demonic being x sacrifice with a little revenge twist perhaps? Like the sacrifice convinces the demon being to help them get revenge on the people that sacrificed him?