The marquis's daughter, who was told "I'll settle for you since I can't be with the person I love," decides to take revenge on her fiancé, the crown prince.

I want to live for a true love, but that doesn't seem possible either. So I'll make do with you! That's what I was told right off the bat when my engagement to the Crown Prince was decided. I can't stand just looking at you... I didn't want to hear that from someone who casually chose a fiancée based only on conditions. Though I was pushed away to a separate residence... The Prince declared that he could get engaged to his true love instead, so he's breaking off our engagement with me. And so I resolved to take revenge.