Twilight and Celestia use an experiment that brings a human through. Humans are considered monsters, but Jack( the humans name) doesn't want any trouble, so he escapes and somehow lands on Sweet Apple Acres.

The Apple family give him shelter and its going well, until Applejack returns and see's Jack.

Applejack however promises that she will not give Jack up to Celestia, she hates him from what she heard, but once she see's what he does, she starts to like him a little, then a lot, and, well you get where this is headed.

(Applejack x human OC)