Slice of Life
[Predecessor to Expectations (a superior rewrite) which can be found on Beige Monkfish's page.] Twilight Sparkle lives a generally normal life, full of everyday things with no strange events. Just a Unicorn. Have you ever heard of a Unicorn suddenly growing wings? Maybe. Twilight, running into this situation, realizes quickly that this may drastically change her life. She might have to move to Canterlot, away from her friends, and manage the sun in Celestia's stead, or...or something. But she doesn't want her life to change. She comes up with a solution: Hide it, keep it a secret, a-and don't let anypony know. No one ever needs to know. If nopony knows, nothing will happen. But...some of her friends are extremely prideful and idiosyncratic, and some even incredibly prying. Those friends...might be...angry...with her. Yes, they're good friends, but there is some thin ice you just don't trot upon. And you can't keep something a secret when it's so easy for somepony to find out.
Expectations can be found here.