The human royal family of the Mesilan Kingdom and the royal family of the demons, have made a pact over millions of years ago that every 1000 years, the human royals shall give birth to a child, and the demon king shall come and make sure that child will wed his child by burning a sigil on the lower part of the child’s neck that connects to the back, and that child shall marry the young royal demon.

This unfortunate royal human this 1000 years, happens to be you.