All Derpy had to do was deliver the mail it was really that simple, on her way home there was a storm and wanting to be helpful, of course she investigated it. Only to be pulled into it, and ending up in this strange new place where she found out she was a Princess. She and her friends saved this place from the jaws of evil many times over. She was really confused about this and had to find a way home! 

Rated Mature for mentions of rape, enslavement. Nothing is actually described in detail but just putting this here as a caution. If you are not comfortable with such subjects, walk away now.
Added tags- Romance.