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Heroine, Chief Female Knight of Justice, Princess' Guard The male protagonist is a dark, cunning and yandere vampire, the third prince (who is lame in the early stage) Thousands of years ago, the kingdom and family she guarded were destroyed due to the struggle of his family; a thousand years later, because of his blood mark, she was abandoned by her parents in the human world. She needed to always be wary of the evil intentions of vampires, but the best friend she finally met was once again involved in the conspiracy between vampires and humans... Will this story overlap with the story from the previous year...