Turns out that there's an old Equestrian law on the books that any creature can petition to join any princess's harem. Somepony should have warned Twilight, preferably before the former changeling queen showed up on her doorstep.
After spending Nightmare Night in Ponyville, Luna decides on how to reward the six mares who defeated Nightmare Moon and saved her from herself: Marriage.
Lyra and Bon Bon have a somewhat unusual relationship. One of them is a secret agent. One of them is a changeling. And the third one is a perfectly normal pony about to have her life turned upside down.
Twilight Sparkle failed her entrance exams for Celestia’s school. Worse, she is a danger to both herself and others, resulting in her magic being suppressed. Dreams crushed and now one of the weakest unicorns, a nightmare comes to her.
Twilight Sparkle is sure that Rarity and Rainbow Dash are having relationship issues, primarily because they keep inviting her to join them on all their romantic dates.
Starlight Glimmer was having a pretty good morning until she discovered something that shook her to her very core: Apparently she's dating both of her best friends, and she's only finding this out on their first anniversary together.
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.
Morning Glisten isn't really a good filly. She fights with other foals, and she doesn't really trust adults. So when three Princesses take an interest in adopting her, she'll need to become someone else to win their love.