It's Spike's birthday, and his six best friends have promised to give him whatever present he wants. And not just any promise - a Pinkie Promise. An unbreakable promise.
Big mistake.
Now Spike is asking all of them to trade places with each other, to try living like each of their friends, for an entire day - and they have to act just like their friends, too. Also, yes, he does have a camera... so no one will be forgetting this anytime soon. Even more disturbingly, if they give up before the day is over, they have to pay Spike a fee of ten bits.
Applejack is furious. Rainbow Dash is trying (and failing) to stay casual. Twilight is thinking about just how many things could go wrong. Rarity is appalled. Fluttershy is downright terrified. Even Pinkie Pie is disenheartened.
Thirty days. A whole month of weirdness, mishaps, surprises, hilarity, and - in every case - failure.
This is going to be a wild ride.

(This is not my art. Link to cover artist's page: http://tomfraggle.deviantart.com/art/Mane-6-Looking-At-Us-or-You-471258622)