Kon'yaku Haki o Shita Reijou wa Gaman o Tomemashita

The crown prince, who became her fiancé, loved her sister, who was as lovely and pretty as a fairy. Despite having believed that she had died Faustina somehow she woke up on the day of her engagement to the prince and regained her memories of the "last time," and decided to stop holding back so that she would not make the same mistake again this time. She decided to give up the position of the crown prince and give it to her sister, and to live her life doing whatever she wanted! However, all her actions to break off the engagement turned out to be in vain!