Daisuki Datta Konyakusha ni Miryou no Mahou no Sei de Konyaku Hakisaremashita.

Sienna loves her fiancé, the second prince Riley. She has been in love with him since she was a little girl, and she is determined to become a happy bride. However, Riley suddenly and coldly tells Sienna, "I'm breaking off my engagement to you." Next to her was the marquise, Imogen, who was also in love with Riley. She is told that he has found true love with her. Sienna is shocked, and Imogen flashes the ring on her finger. Riley becomes even more fascinated with her...

A beautiful prince whose heart has been manipulated and a pure, innocent, and healthy daughter. What will become of this sweet, passionate love?!