The Devil's Charm (James Moriarty X Reader)

You are an old high school friend of Sherlock Holmes, and you have recently moved to London. You haven't seen Sherlock in over a decade, but you still miss him whenever you see his name pop up in the newspaper.
Eventually your path will cross again with that of the now-famous-detective Sherlock, but your introduction into this new world of his may lead you into the arms of his psychopathic, charismatic nemesis...