Lucy's life at seventeen was already rough enough, but some how livable up until the day the incident happened and she lost practically everything. Being forced to sit and watch her loved ones murder and tortured endlessly for three days straight.Until she manages to summon a great demon, making a contract with the one and only Sebastian Michaelis for revenge in exchange for her mortal soul. Working with the smug and sarcastic demon, Lucy works hard to hunt down her family's murderer and kill him herself. Then when things start to go as planned, Sebastian finds out the truth about his new found mistress; she's not completely human. With this information Sebastian determines that Lucy's soul is more valuable than he first thought and grows a little too close to his new mistress...

In the Victorian Era, a young boy named Ciel Phantomhive lost his parents and his mansion was burnt down two years ago. In the process of losing his parents, he seeks out to get revenge on those who killed them. Ciel summons a demon that he names Sebastian and makes a contract with him: Sebastian would serve and help Ciel avenge his parents' death in exchange..... for his soul.... Later on, they meet a girl who is nicknamed as "Little Red Riding Hood" or "the Maiden in Red." She has somehow lost her memory and calls herself Mystery. She meets Ciel, Sebastian, and the others and her life changes. However many desire this lovely maiden for their own needs, especially the demon Sebastian. Along the way, Mystery will encounter danger and secrets of her past and who she truly is. Who is she really? *Won 2nd Place in the AnimeWattyAwards 2014 contest in the Kuroshitsuji/Black Butler category