Slice of Life
When you wake up naked in a strange bed you can feel uncertain. When the person asking how you feel is a ‘talking horsie’ you can find it hard to focus on anything else. When they seem so unimpressed when they already have talking Cows, Sheep, Diamond Dogs, Zebras, Dragons, River Serpents, Buffalo, and Minotaurs then you might as well just keep your head down and do farm chores and try to gradually get used to this all.
But when three infamous fillies ask you to do something then perhaps would have been better to say ‘no’ and leave your life quiet and uneventful.
Set from sometime not very long after Discord’s puppy-eyes and reform to where I gamble and have the season 4 opening threat dealt with on the day of the coronation and Equestria Girls start only two days later.
(EDIT: Though from the spoilers/teasers it seems the vague references to the threat missed by so far as to obviously be referring to something else...)
(EDIT 2: Blog post on problems and thoughts. AU tag added since things were contradicted.)