A crossover with the anime/manga Kuroshitsuji/Black Butler. You can read it without having read the manga/ watched the anime, however, I would suggest you look up the character.

A red unicorn with a chainsaw cutie mark fall's from the sky, and nopony knows where it came from.

Turns out his name is Grell, and he has amnesia. And everypony thinks he's a mare!

What will happen when darkness bubbles around the newcomer? And what love will blossom from this?

WARNING - Will contain gore, and in the future, yaoi/slash/man love/colt cuddling.