The kid’s dad is Mr.Evil Dragon

Innocent maiden Ivy is selected by the church as the "Bride of the Dragon". Upon discovering it is a ruse to offer her to the Duke, she flees overnight. Amid a sea storm, she encounters the injured dragon Rex and bears their half-dragon son Elian. Five years later, Ivy is captured and tortured by the church but remains unyielding. Rex senses his bloodline and comes to her rescue. After identity revelations, the Duke's siege and a holy war, they join forces to overthrow the conspiracy. Ivy becomes the Duchess, and the family finally attains peace and happiness.