The series follows Sebastian Michaelis, a demon butler who is obligated by contract to serve supernatural to Ciel Phantomhive , the leader of the Phantomhive noble family, and in return get Sebastian Ciel's soul when he finished all his tasks, including revenge on those who killed her family, then it shall be allowed Sebastian to kill him and take his soul.
In a mansion on the outskirts of London in Victorian times , the butler Sebastian Michaelis serves Ciel Phantomhive, who is head of a noble family and a toy company. Sebastian carries out any task required by his master and solves the problems plaguing England with ease and perfection because of his demonic lineage and a contract with Ciel Phantomhive. The opening theme is "Kiss of Monochrome" by Sid and the ending theme1 is "I'm Alive!" by Becca.