Lunia, the daughter of the count of Persephone, was shunned by her father and treated like a tool by her half-brother and had a lonely life. When she was chosen by a priest to be engaged to Hades, the duke of Khronoa, feared as the "King of the Underworld", she accepted the marriage, but Hades, despite being afflicted with a curse to have a short lifespan unless he marries a bride chosen by the emperor, told Lunia he had no intention of loving her. In order to keep Hades alive, Lunia deceived him and spent the night with him, then disappeared without realizing that she was pregnant with his child. Seven years later, Hades managed to find Lunia, attempting to take her and the child back. Source: MAL, edited