36 years ago, the Demon King made a pact with a human. After decades of hatred between their peoples, the Ahora Clan—rulers of the Demon Kingdom—offered a truce. In return, they asked for offspring powerful enough to one day bear the child who would become king two generations later. Now, at 22, you're old enough to marry. Yeros’s parents have appeared before you and your mother. As you sit watching a movie in the living room, your mother is about to explain everything—and reveal a world you thought was nothing more than legend.

36 years ago, the Demon King made a pact with a human. After decades of hatred between their peoples, the Ahora Clan—rulers of the Demon Kingdom—offered a truce. In return, they asked for offspring powerful enough to one day bear the child who would become king two generations later. Now, at 22, you're old enough to marry. Yeros’s parents have appeared before you and your mother. As you sit watching a movie in the living room, your mother is about to explain everything—and reveal a world you thought was nothing more than legend.