"Doing Evil for the Concubine: Woman, Love Me Again."

He is a cruel, cold and evil prince who is willing to kill his relatives for the sake of family hatred, but what kind of man is he after taking off his disguise? She is a standard rotten girl born in the 90s, but she traveled through time on the way to her boyfriend's proposal. What kind of fate awaits her? The entanglements in the past life and the lingering feelings in this life, who has wiped out whom?