Rarity makes a new friend at Crotch Sniffers Anonymous, a meeting to which she was sentenced after non-consensually sniffing the crotch of Anonymous the human. It seems to be a growing problem.
You are Anon. You got adopted by Prince Shining Armor for tax reasons, long after your adventures ended. But you're starting to think that Shining Armor might be a terrible dad.
Celestia invites Anon urgently to the castle. Luna is out of sorts, and she doesn't know what to do. Since Anon was dating Luna, it made the most sense for him to find out why. What he finds may bring him closer to Luna.
Opaline Arcana is quickly rising to power. Princess Twilight is losing hope. Her last resort? A long-forgotten prisoner of Tartarus. What could go wrong?
Months after running into Anon in the bar, Lightning Dust meets with him to ask him for his help. He offers it willingly, which makes Lightning Dust grateful. Neither knew what was going to happen. And neither did Spitfire.
Ponies have had a lot to say about Milky Way over the years. They've had a lot to say about Anon after his arrival, too. Thankfully, neither of them care anymore.