15-year-old Pureblood Vampire, Kuari Phantomhive, is the late daughter of Vincent and Rachel Phantomhive, and the twin sister of Ciel Phantomhive. They lost both parents in a fire, the manor burned down, and kidnapped for a month on their 10th birthday. Later makes a contract with a demon named Sebastian Michaelis. What would happen if the young Phantomhive had to juggle being the Queen's Cat, running the Funtom Toy Company, and had to go to school? Find out as we go along with the Phantomhive's twin and her demonic butler!