We're Both Monsters (Sebastian Michaelis x Titan!Reader)

Attack On Titan and Black Butler crossover I guess? I SUCK AT SUMMARIES, BETTER THAN IT SOUNDS!!! Everyone in the Survey Corps knew (y/n)'s secret. Some accepted her for it, others didn't. (y/n) has been a titan shifter for a long time, and has learned how to control it, well better than the other titan shifter (Eren)...