Nightmare Moon returns and is hit once again with the Elements of Harmony rendering her a mischievous little filly.
Much to Nightmare Moon’s annoyance, Anon thinks she's cute as all hell and is the only one willing to put up with her antics and evil, so Celestia tasks him with reforming the bundle of misery and mischief.

Cover Image is by EvetsSteve, may he rest in peace.
Chapters 1-21 were converted into prose from my greentext stories with the help of Nav/WhatMustIDo