Twilight's smart enough to have nothing to do with Rarity and her gang of delinquents. But as her world view is challenged and as Rarity takes interest in her, slowly Twilight finds herself getting closer to Rarity and becoming a delinquent herself.
There is a story of a Changeling Queen who impersonated a princess, hypnotized the head of the Guard, and led an army into Canterlot. This story isn't quite that story.
Applejack and Rainbow Dash ended up together in the main universe - through the portal, it was Applejack and Rarity. It's a fair question who made the right choice - from the sidelines, the other Rainbow and Rarity wonder if it was them.
It's not easy to go back to your life after a thousand years of insanity and exile. All the same, there's a special somepony that Luna desperately wants to get closer to - all she has to do is get up the nerve to talk to her.
Chrysalis has been sent packing, but Twilight is no fool, and pursues. But in doing so, she discovers a hidden side to the queen that leaves her very surprised.
Despite an awful past, Wallflower loves her life with Sunset and has for many years. Then she finds a secret Sunset's been hiding. Now Wallflower is determined to stop Sunset from making the biggest mistake of her life—asking Wallflower to marry her.
Chrysalis accepts Starlight's offer of forgiveness, and finds herself transformed and filled with love. She's ready and willing to share this love, starting with the ponies around her.
Queen Chrysalis accidentally Reformed, and now needs a vacation to sort things out. Ocellus and Smolder are summoned by the Cutie Map to solve a friendship problem. Surely these two things are unrelated. Surely.