HALO: Equus

The humans have found a new planet full of strange-looking aliens. They are, indeed, humanoid, however, they are brightly colored and look almost like horses. They are not like the aliens they've found before, no. The are friendly and like the humans. The humans make an alliance with the leaders of this race, Celestia and Luna. They seem to be normal, others have wings, and others have horns which have a strange power, and only four known have both. However, the Covenant threat grows larger and closer, and the humans seek help with their Spartan Program in these new friends. With their permission, these...Equestrians agree and some are taken. Three certain children excel greatly in the program.

(This is set many years in the future during the human-Covenant war.)

(Sex tag for certain crude jokes and scenes; so far that they may be clop. If there is any clop, it will be its own chapter that won't have anything to do with the story so you can skip if you want. I will put a marker so you know what chapters are clop. Gore for...well that's obvious. There is also strong language. If these offend you, this is not your story and you should git out now. You've been warned.)