SebastianXReader -- Deceiving Appearances (BlackButler Fanfiction)

Full summary of story on the inside-- You were once known as an assassin but that changed after the day you failed to kill Ciel Phantomhive. You soon became a part of Elizabeths family. You then became friends with a demon you met at a ball who quickly fell in love with you. You rejected him and in the heat of the moment he turned you into a demon causing you to abandon not only the demon but Elizabeth too. However, you soon found yourself starving on the streets of London not knowing how to quench that hunger. But you soon run into a raven haired demon with a job on his sleeve. (Please read the summary on the inside as it is makes so much more sense.)