But if you want the long description, here it is: The Storm King has been given a second chance by attending a Redemption Class in Twilight's School of Friendship (with that particular class being taught by Discord because he would not stop bugging everyone about it). Of course, redeeming him isn't going to be that easy but, as you can tell by the title, he will come around (especially when there is a worse threat at stake).
In spite of the name, no, there is no Jim Carrey or Neil Patrick Harris to be found here so prepare to be disappointed if you were hoping for that. The only reason I named this fanfic like that is because it sets up the satyr-ical (get it, because The Storm King looks a little bit like a satyr) tone of the fanfic.
PS: The "Yay!" in the title is sarcastic.