An evil overlord is banished from his world, his destination being Equestria's moon. There he encounters Nightmare Moon who he realizes is the worst villain he's ever met. When she reveals that her own banishment is nearly over and offers to take him with her, he decides that teaching her how to be a proper villain is a small price to pay for skipping a thousand years of isolation.
Also just a heads up, this is in 2nd person.
Cover picture drawn by Prince Mi Amore Rio and colored by Rat Chieften.