Ok so this doesn't actually contain sex, but it has a lot of sexual themes.
The story is about you getting teleported to equestria, only to find that it's actually like the world of the weirdest fanfictions out there, with a rapist Celestia, and weird ass artifacts.

Well this story isn't really able to be described to just read it for yourself.
Be advised, you will not like this. Especially if you're a HiE writer.