Another side of the story

"Twilight Sparkle, my sister's most beloved student." Luna gazed into Twilight's eyes with a mixture of hate and sadness. "Is there something wrong, princess?" Twilight said, trying to calm Luna down. Luna only hung her head and paced around Twilight's library even faster. "Yes, there is something that is wrong Twilight... if you couldn't already tell." Luna trotted up Twilight's stairs, into Twilight's study room. Twilight followed her, worry clouding her purple eyes.

"W-where are you going, princess?"

"You needn't call me princess, as you are now welcome into the royal family."

"But upstairs is my study room- the first two floors are the library, and you said you only-"

"Pardon me for interrupting, Twilight Sparkle. But I was unable to find what I was looking for in your library, so I must look in your study."

"Well, can you tell me what you're looking for?"

"I'm not allowed to tell anyone, not even you."

"Oh princess, you can tell me anything! I can help!"

"Not with this, Twilight Sparkle. This is something which has left a deep emotional wound on me... one even your all-powerful magic cannot fix."

Luna continued up the winding stairs, and Twilight had no choice but to follow her. When they had come across the private circle of books Twilight called he 'study', Luna began searching immediately. When she found a book about the mare in the moon, she flipped through it's yellowed pages anxiously.

"Princess, is this something about Nightmare Moon?"

"Yes, somewhat. Not about me turning into her again...it's just about my past. I want to see if anyone knows."

"Know about WHAT?!" Twilight yelled, her anger rising quickly.

Instead of responding, Luna looked to the ground, on the verge of tears.

Stunned, Twilight immediately tried to comfort her.

"Princess, is it me? I'm sorry I yelled!"

"It's not about that, Twilight Sparkle. The author of this... knows something they shouldn't. I'm sorry, I will have have to burn this book."

"You can't! This is a one of a kind book, you can't!"

"It's one of a kind...? Meaning this is the only copy of this book?"

"Yes!"

"That's a relief..."

Luna set the book down on the wooden coffee table in the middle of the study.

"I'm sorry." Luna said, putting her horn onto the middle of the book. Using her strong Alicorn magic, she lit the old book on fire, the book now glowing with blue flames.

"Princess...? Why?" Twilight whimpered, staring at Luna, who had blue flames reflecting in her shiny eyes.

"Some things were never meant to be known."