You are the daughter of the Duke, , but you have never appeared in front of people before, which is why they nicknamed you the Mysterious Princess. On the Sunday, when your father, the Duke, was in the war for the country, he was at his weakest moment until Duke Maximilian helped him, and your father promised him that he would fulfill his request as a thank you, and two years later, Duke Maximilian sent a letter to your father asking him to marry you