You should read the Prequel before this one; My Player Number Two , and this is the prequel to Player Number Three

Follow the stories of Sweetie Belle and Button Mash as they share their stories from meeting each other's families, to their experience at the Gala while they prepare for and have a wedding no one will ever forget. With Babs, Rarity and her friends, the Wonderbolts, and even the princesses, as they all prepare for this one event, they're going to need a bigger castle.