Monster to My Ex, Queen to the Dragon King

There is a dragon cave in the back hill of Salt Lake Castle, where the evil dragon William and his brother Little Peter live. Little Peter likes to eat bread very much. Every time he goes to the castle to buy bread, Princess Susanna in the castle will treat him warmly. Unfortunately, the good times did not last long. Susanna's fiancé, the brave Vincent, also saw little Peter with dragon horns. Vincent, who dreams of becoming a dragon-slaying warrior, chops off little Peter's head without any reason and hangs the dragon's head on the flagpole of the castle. This action angered the dragon William, who sprayed flames and burned the entire castle with fire. In order to survive, the surviving old king could only send Susanna to the dragon's cave, hoping that by sacrificing Susanna, William's anger could be appeased.