Deacon Sebastian Michaelis is responsible for taking care of the 12-year-old noble Master Charles Phantomhive. The butler Sebastian is a devil. He made a contract with Master Charles and will always be loyal to his master. The price of the contract is his own soul. This is the story of a deacon and his master.
I'm just translating the anime into words, so please forgive me if my writing style is not good.
PS: The update speed will be very slow before I graduate from high school... It will still be very slow after I graduate from high school orz