Korrine Kingsleigh is the last member of the Kingsleigh household. She had inherited everything her parents had and became the Countess Kingsleigh, the Queen's white rabbit, her most skilled servant. Korrine Kingsleigh also possesses a demoness maid named Nadine Lemaire, known as the feline demon of Hell. Along with that, she herself possesses a power no one has ever learned about until she meets the Earls Phantomhive and Trancy and their demonic butlers. What will the two bring her? Will she gain something that she never expected to recieve? Or will both mistress and maid gain something more?