After Her Kingdom Fell, She Began Her Revenge, Torn Between Love and Hate

After all the splendor faded, all that remained was a land forever silent. He conquered her kingdom and destroyed her family, yet was also willing to give her the whole world. He was the emperor of the southeastern kingdom, ruthless and inscrutable. She was a princess of a fallen nation, burdened by a blood feud, yet forced to hide her strength. He tormented her and doted on her; she loved him and hated him. When the cold blade pierced his chest and her obsession proved futile, where could they go from there...?