Princess with a Different Surname

Hostess: "You are violating the agreement and the rules of the world!" The scheming prince: "Promise? Rules? Are you important?" ———————————————————— The heroine spoke softly: "Brother." The man in white and the man in pink turned around at the same time and smiled fondly at her: "Sister, what's the matter?" The man in pink said angrily: "She is my sister!" The man in white retorted: "She is also my sister!" The heroine holds her forehead...