It's been 20 years since Twilight and her friends reformed Nightmare Moon,

and a celebration has been coordinated!

And put in charge of the celebration are the seven children of the ponies who defeated her.
And in keeping with the family line, chaos ensues and everypony needs to work out their differences so that everything can go off without a hitch.

The Kilalaverse, and all characters and setpieces unique to it, belong solely to Kianamai/Kilala: https://www.deviantart.com/kianamai