Through a series of fateful events (and no small amount of craziness) all of Equestria's greatest villains, heroes, and princesses come to live under the same roof. Celestia may very well loose her sanity throughout the shenanigans that ensue.

Also, Discord is Best Worst Princess.
Luna waz here.
Celestia droolz, Sombra Rulz!

Wait, what?

(Same universe as Discord's Day Off by me)