Deimos no Hanayome: Saishuushou  

悪魔の花嫁 最終章

The continuation of Deimos no Hanayome (which was unfinished), but with the new character designs and refreshed artwork.Deimos was once a handsome god. He loved a beautiful goddess who returns his sentiments. The problem, well, she is his sister. For their crime against nature they were struck down out of Olympus. The brother is now a demon and the sister a rotting corpse at the bottom of the ocean. Deimos must choose between his sister and her living human incarnation. His sister is jealous. The girl is horrified and unsure of just what to make of her situation.(Source: MU)