Douma, an immortal demon, and his lover, a mortal human. He actually loved you, he didn't know what love was, but when he met you he began to actually feel something. However, he would live forever, and you wouldn't. So over and over again, he'd watch you die and reincarnate. Today was no different, you had reincarnated again and met him. This time, you were a demon slayer. You had a mission to kill him, and Douma just looked at you, in his eyes there was a look of love and despair.