This story is based off of DuskShadowBrony's "A Pacified Kingdom." I suggest reading it first before reading this as many elements will revolve from the original story.
Cover image by CuddleHooves
Dr. Mindset Shield, Ph.D and Royal Therapist, comes to discover she has been overworked and irritable about her job. Princess Luna, however, informs her of a neighboring kingdom in Little Valley that's in need of her psychology expertise and be a vacation for her at the same time. While skeptical, Mindset agrees to visit this strange kingdom, which to her surprise is almost entirely run by foals! Even more surprising, she notices herself getting younger the longer she stays. Princess Luna wouldn't send her here to be a foal again...right?
This story contains Diaper Usage, Age Regression, and some mature themes. If you aren't interested, might I suggest watching some good anime?