My accomplished older brother, the next Duke, and my beautiful younger sister, who greatly resembles our mother. Caught between them, I, the "eldest daughter of the ducal house," was also "the Crown Prince's fiancée"—until today, when he proposed breaking off our engagement.

I had dedicated myself to the role, knowing I would one day become queen, yet next to my fiancé, the Prince, stood the rumored Baron's daughter.

"You certainly make an effort," the Queen said, delivering the final blow, "but that's all it is." When I returned home in despair, my father's decision negated everything I had ever been. The dream I saw as I cried myself to sleep in my room was of a completely different world. "My past life?"

This is the story of "the eldest daughter of the ducal house" who, after acquiring powerful allies and cheat abilities, decided to break away from everything and live a new life as herself.