Keiyaku-kon Shita Aite ga Oni Saishou deshita ga, Kono Tabi Saishou-shitsu Sennin Hosakan ni Ninmei Sareta Jimi Bunkan (Hensouchuu) wa Watashi desu

In the kingdom where Christine lives, love marriages have been popular since the current king married a commoner. Even married couples were willing to divorce if it was “love of destiny. While Christine was fed up with this view of marriage, she met Leon. In order to get even with her fiancé, who repeatedly cheats on her, Christine tells him that she has found “the love of her life” with Leon and calls off the engagement, but Leon turns out to be the Prime Minister of France!