TVTropes page yay!A human arrives with a house in Ponyville. The Mane Six, and Princess Luna must deal with this new arrival. But not everyone agrees how it should be handled, not everyone agrees on what danger it represents, or the benefit it can be to Equestria.

The inhabitant must also deal with the new rules and conventions of this new world it knows nothing about, as well as the mystery of its appearance, and the incongruities of its arrival.
TVTropes page yay!

A group of humans attempt to escape a global nuclear war through the use of time travel. However, something goes wrong with Sam Mitchell's pod, flinging him far into the future, into a time where humans no longer exist and a race of sentient ponies now thrive as the dominant life form. He eventually comes to the attention of a certain purple unicorn, who aims to learn all she can of Sam and his civilization as well as help him adjust to his new life.

Can Sam handle living as the only human? Can Equestria, and Twilight in particular, handle the changes this alien brings?