Issei: The (secret) Playboy Lucifer

Smut with plot. In this story Issei, formerly Issei Gremory (and Hyoudou) is the Maou Lucifer of the Underworld. Behind a kind and caring leader of a faction is a pervert, oppai-loving playboy who loves to fool around with woman, even if he is married. Whoever said a Maou can't have a harem? It won't hurt if no one know about it, right? Issei/Harem. Warning: Hardcore and Incest.