"Henrietta, I'd like to discuss things with you, but what do you think? Why don't you become my mistress instead of the princess?" One day, Henrietta receives an outrageous proposal from her fiancé, Prince George. Deciding to break off her engagement, she chooses to break up with Georges. She finally calms down with this... To Henrietta who thought so, there was an order from her grandmother, her ex-princess. She said that she would go to the current king's younger brother, Duke Richard, and try to persuade him. Speaking of Richard-sama, he is famous for loving the arts and disliking noise, staying in his territory regardless of the season, and rarely appearing in society. However, the person who was waiting for her at the place where she was headed at the direction of her pushy grandmother was a handsome duke who was different from the rumors...! ?