A teenager, with no knowledge of any world but his own finds himself in another. Of course, his species are also there, but in a different evolutionary path; as mindless, aggressive beasts. It also doesn't help he's thought of as one.
I just buy a mask and sword from some cloaked weirdo, and now I'm in a world of humanoid ponies in Equestria. Oh, and I have powers that are identical to Spider-Man. Well, this is my life now