Marriage Alliance for Revenge

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Olivia, the Empress of Rhone Empire, died because of her husband’s scheme, then she had a chance to live again in the body of an unknown woman who lived in a slum. After that, Olivia met her ex-fiance, who was the real heir to the throne, and hid her real identity from him. She made a suggestion to form a marriage alliance for each other’s revenge. Will their revenge succeed without any obstacle