hot!!! love it!!! but only CHENGxian not XIANcheng i dont like wwx topping anybody and i mainly see jc as a top except for when nmj is railing him in my daydreams but yeah i think its delicious, not really as an endgame though, just smth that happened in their youth maybe an arranged marriage gone bad or a torrid romance that ended poorly or them experimenting as teenagers idk