Since filly, Twilight has been taking an extra class after her regular classes at Princess Celestia's Gifted Unicorns school. But there was a detail: she never showed her friends the clothes of her extra class.

As Rainbow is somepony very close to her, she decides that Rainbow will be the first to show her the outfit that she kept for many years. The comment Twilight receives from Rainbow was not what she expected.

This history is a request of Mpatton17