He is a descendant of the former Datong Emperor. He inherited his father's legacy and wanted to disrupt the world and unify the fourteen kingdoms.
She was the seventh princess of Yueying Kingdom, known to the world as the most beautiful woman in the world. She knew his identity and his ambitions, but she still followed him.
Is he retaliating against her, taking advantage of her, or is he showing a little love and affection to her? She didn't know, and neither did he.
He only said that the world will always be unified.
She only wishes to work with her in the next life.