Extra for a Reason

"hahah..ha extra, yes an extra, I've always been an extra of this world and l'll still be an extra tomorrow. But...you don't know how important the role of an extra is and what.... an extra is capable of..."
A girl named Terla lives in said to be the most peaceful country called "Land of Peace".
She thought the world was hers and that the earth revolved around her until she met the her inside and realized she has been an extra all this time.

What about you? Have you ever felt like an extra? Who do you think you are and who eactly are you?

A/N the "extra" here doesn't mean she's a character of a book.