My childhood friend was apparently chosen as the hero, so everyone in the village is going to cheer them on.

Mary was the daughter of a village with only 30 villagers. She had a lover who was about to get married. Yet she was ordered by the king, and Yulis, who was to become her husband, was coerced into departing as a hero. Wearing a collar like that of a slave. The angry villagers headed to the Demon King's castle to get Yulis back. The king did not know that those villagers were ________.