This story is a sequel to Getting Shy
Rosa was training to be an 'Assistant Pony' - a coveted position within the mixed pony and human society on Earth - when an unusual job turns her life upside down. She will get to see the other aspects of life, meet new, fascinating people, and even embark on an adventure to find a missing friend.
Through her journey, she will discover a lot about why things are as they are, why her people are second class citizens, and what had happened to their mythical home, Equestria.
This is a sequel to 'Getting Shy', but in the loosest of terms, so reading that one is not really required to start this story. At best it's happening in the same universe.
Tagged 'Sex' and rated 'Teen' because there are some vague descriptions of "off camera" lewd acts, and some potentially racy (but non-explicit) situations.