Two lovers have kept their relationship a secret for over 3,000 years. One is a powerful but handsome demon, and the other is a beautiful angel mixed with a pure divinity blood. The angel is so gorgeous that her beauty surpasses all others, including the goddess Elizabeth. Elizabeth harbors deep jealousy towards the angel, though she keeps it hidden. Elizabeth devises a plan to break them up so she can be with the demon, Meliodas. Her actions spark a "holy war" between the demon clan and the goddess clan. Now, the beautiful angel must fight alongside Meliodas and the jealous Elizabeth. Despite the war, the angel and Meliodas remain together, even as they face the curses of the Demon King and the Supreme Deity. Will Meliodas find his lover, save her kingdom, and keep his promise to her? Or will Elizabeth's jealous schemes succeed, breaking them apart and allowing her to claim Meliodas for herself?