Dark Wings『Black Butler X Male! Reader Insert』
What the title says...
(Y/N) (L/N) is the son of the Queen of England, he is the childhood friend to Ciel Phantomhive, they were separated, never to see each over again after the house fire, but when Alois invited (Y/N) to the Trancy Manor for a ball, he sees Ciel there, not realising it was him, since he was told by his mother that he was...