The two were originally the same person, but one was the prince of the fox clan, and lost one of his three souls and seven souls due to being framed, and the other was this soul and one soul. He went to the mortal world to look for his lost soul. The two met, got to know each other, and fell in love in the mortal world. But because he killed too many people, his life span was shortened and he was destined to die young. Will he take back his soul, or will he spend all his energy to keep him alive?