"...The test ends when you open that door."

Princess Luna has begun searching for her own personal student, and her test has hit a small snag: Not a single unicorn, out of the dozens of applicants, has passed. In fact, every last candidate has failed the test in seconds.

But just what is the purpose of this test? And how can somepony pass it?

A young earth pony named Morning Glory is going to find out.

It's the Summer Sun Dance at the Equestrian High School. Two ponies, both lost in the night, waltz under the starlit sky.

WARNING: VERY sad!!

Based on a comment from Ponyphonics "Starlight Waltz"! Thank you, River Melody, for this VERY unique idea and for letting me base this story off of it! You're a creative GENIUS!
HERE'S THE SONG!

HERE'S THE LINK TO THE IDEA ORIGINATOR'S VERSION!