Konyaku Sha Wo Yuzure to Iunara Yuzurimasu. Watashi Ga Hoshi No Ha Ana Ta No Konyaku Shananode. (Regina Books) [Light Novel]

[Machine Translation] Daughter Marie-Anne has endured a rigorous education in order to become the Dauphin's fianc e. When it is decided that she is to become the future Dauphin's wife, her younger sister, Eliana, begins to be selfish with her. One of the most annoying things is her habit of coveting her sister's things and forcing her to exchange them for her own. Marie-Anne, annoyed by her sister's selfishness, comes up with a plan. She wonders if she and her sister's fianc can be exchanged. She is not sure if she can get her sister's fianc e, Duke Harold, to trade her for him, because he has been the love of Marie-Anne's life since they first met as children. Marie-Anne has succeeded in exchanging fianc es as she had hoped, but she is still unable to reveal her feelings for the Duke out of a sense of guilt. But for some reason, the Duke is still doting on her...

王太子の婚約者となるべく、厳しい教育に耐えてきた令嬢マリーアンネ。彼女が未来の王太子妃となることが決まると、妹のエリアーナは姉にわがままをぶつけるようになった。中でも厄介なのは、なにかと姉の物を欲しがり自分の物と交換させる悪癖。そんな妹に悩まされるマリーアンネは、ある企みを思いつく。自分と妹の婚約者を交換させることはできないか、と。なぜなら妹の婚約者である公爵ハロルドこそ、幼い頃に出会って以来マリーアンネの心を支え続けた想い人だったのだ。思惑通り婚約者の交換に成功したマリーアンネだが、罪悪感から公爵への想いを明かせないまま。けれど、公爵はそんな彼女をなぜか溺愛してきて...。