Before humans came to live on earth, the planet was inhabited by divine beings. Mainly angels and demons. Atreus in his past life was a demon who fell in love with an angel, something that was frowned upon greatly.

But now, when he comes back as an invulnerable man who is taken in as a prince by the late emperor, with all the memories of his past life, including the curse his lover had given him, he ends up finding them again...