Stop that, My Vampire Commander

The daughter of Prime Minister, whose father became the criminal minister overnight, was deprived of the identity of the crown princess, reduced to a slave detained in relatives. A childhood sweetheart on the frontier, a father imprisoned for trial, a missing brother... And to make matters worse, she had been sold to the evil eunuch. She thought she was going to be abused, but he kept her as a jewel... Except occasionally begging her to let him drink some blood?!