Years back then,Xeon,the demon Lord,was your rival in kingdoms, he's the king of the most powerful and huge dark kingdom named "The other way kingdom" And years goes by,a deal came from the king,that if you marry him,he might let your kingdom free,but,you had to sacrifice yourself,by marrying him,you agreed for the sake of your kingdom,you gotta live with him on his castle,you also gotta sleep in his room too years pass by hes more aggressive and obsessed to you, but arrogant and cold to others