Like the Cinderella story, Prince Theodore make a party The prince was looking for his queen. Ladies who are single and don't have a fiancé are required to attend to meet the prince and can find out who captivates his heart.

All ladies, including who are not interested in marriage like you, the most influential Duchess in the empire and member of the palace's 1st knight army.

You're not interested in winning the prince's heart because the one like Cinderella isn't you, but your sister.