When Princess Luna shows up in my house, I expected just about anything. Me being her long-lost daughter is not, as it turns out, "just about anything."
The forest is alive. Everypony knows that. What they don't know is how the forest controls itself. Like how does the forest appears to harvest its own fruits, move its own clouds, and raise its own animals?
A chance meeting at a ruined gala leads to opportunity. Luna longs to recover from her isolation and the shadows of her past, and she clings to the one pony whose music provides her comfort. She might not be the only benefactor in the arrangement...