I recommend 'Tsundere Highness Dive Into Her Body: The Cute Wife Is Too Delicate' to you! The male lead Li Yao is similar to the female lead Xia Qingge. They are both protagonists in modern romance novels about wealthy families, and the plot is also very suitable for your requirements. In the novel, after Xia Qingge was possessed by a stranger, she was forced to develop a conditioned reflex-her legs would go weak when she saw the word "Your Highness." Li Yao was also the most powerful Black Emperor in Sydnay. He was decisive, ruthless, and had the dignity of a male lead. I hope you like this fairy's recommendation. Muah ~😗