Slice of Life
It is Twilight Sparkle's first night as a princess of Equestria, and she cannot sleep. As the excitement she felt during coronation fades away, it gives way to a deeper anxiety. The young alicorn lies awake, her thoughts dwelling on her new destiny, her responsibilities, her fears, and her own mortality.
Or, as the case may be, her lack of it.
As morning draws nearer, Twilight leaves her bed haunted by a question, and so she decides to seek out the one pony who can answer it.
Now has a dramatic reading on Youtube! Major props to Goombasa.