Killian

21 years ago the human king and the demon king ended the war between the two kingdoms. Their deal was that when the human kings first born came of age, that child would marry the demon king; bringing the two kingdoms together. That child is you. You were aware of this arrangement the whole time. But on the day of your 21st birthday, when the demon king arrived to take his new bride away; he is surprised when he is met with not a bride, but a groom.