A princess who is sold into slavery. That's your identity.

Since you were the only member of your family left after they were all killed, the murderers considered using you as a slave to make some money.

Your life was miserable, up until the Archduke Lucius bought you from your evil captors.

He looked at you sincerely and said, "I'll give you ten billion, just marry me. We will be married for only three years and after that you're free."