My father cherished me because I was the daughter of a man who truly loved my sister, who was born from an illicit affair. My sister took everything precious from me—even my mother's keepsake... and then... she even took my fiancé, the Crown Prince, from me. One day, I resolved to take revenge on my sister.

My parents' marriage was a political arrangement. My father did not love my mother... After my mother's death, he brought into the mansion a half-sister, six months younger than me, who was the daughter of the woman he truly loved. I was cast away to a separate building. From there, my half-sister took away all of my mother's keepsakes and my precious belongings. She bullied me, saying, "Elder sister, you're a daughter unloved by Father, aren't you? Father even said he wondered if you were really his daughter~" Whenever I tried to argue back, she would cry to Father claiming that I was bullying her. As punishment, I suffered days of having meals withheld and being kicked by Father. However, at the ball for selecting the Crown Prince's fiancée, I was chosen as his fiancée and thought I could finally be happy. But I was rejected as the engagement was broken due to my reputation as a sister who bullied my half-sister, and I was sent to a remote convent... which was also orchestrated by my sister. And so, I resolved to take my revenge.