The sequel to Black Wife. After his marriage to a human woman, Sebastian Michaelis desperately tries to get things to return to normal. He's a demon, after all. Not only that, but he's also a butler. He has a reputation. But no matter how hard he tries, his wife only seems to get more and more attractive...

Someone is killing the nobles. The police have no leads. The only witness is a bitter, sarcastic maid with first-hand experience in the Underworld, which makes Ciel Phantomhive promptly snap her up...through a demon's contract. In order to fulfill his young Master's orders, Sebastian Michaelis is forced to marry a human woman-worse, a human woman who absolutely hates him.