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Marie Anne, who had endured a strict education to become the Crown Prince's fiancé. When she was decided to become the Crown Prince's wife, her younger sister started to show her selfishness. One of the most troublesome things is the bad habit of wanting something from her older sister and making her exchange it for her own. She is annoyed by her younger sister, and she comes up with a scheme. She thinks she can make her sister exchange her fiancé because Harold, the fiancé of her younger sister, was Marie Anne's lover. Marie Anne succeeded in exchanging her fiancé just as she expected. Marie Anne the extra edition written only in the library!