An Unexpected Visitor

Sebastian MichaelisXReader

Ciel Phantomhive hadn't exactly told everyone that his sister, (fn), survived the fire from the manor and the torture the two of them went through. One day Ciel gets a letter from his older sister saying that she is stopping by to discuss the Funtom company, out of a demon's curiosity Sebastian finds himself intrigued with (fn) and soon finds out a shocking secret.

Disclaimer
I do not own any of the characters from Black Butler but some OCS will be used.