The Disliked Duke's Daughter and Demon King's Afterward

It seems God wants to create a story with a handsome hero and a beautiful princess as the hero and heroine. Duchess daughter Lidianne, cooperating with this plan, plays a dual role as the disliked villain who bullies the princess and the Demon King who abducts her. She abducts the princess and faces off against the hero who comes to rescue her. The battle is quickly decided, and just as she feels relieved that it's all over, the hero tells her he came to help her and kisses the back of her hand. What?! What just happened?! On top of the convenient turn of events, the story's flow takes a sudden turn.