A devoted hero x a village girl who gets caught up in the demon king In a world where a demon king exists, a village girl named Sia is caught up in a demon king subjugation party led by a hero from the same orphanage, Roan, and becomes one of the people who save the world. It is a famous story that the hero and the saint who achieve the demon king subjugation are united... but for some reason, Sia is the saint who holds the wedding ceremony with Roan. A devoted hero and a village girl, a sweet wedding night for the two of them. "I've deceived the whole world, so I can't turn back now, right?"