Cassidy X Reader (FNAF)

Y/N, She ran away from her family at a young age, she doesn't tell anyone why. She went to her best friend's house and their parents took care of her.
But Y/N remembers what happened and why she ran away from her family... It's a dark secret that she never wants to tell anyone. Not even her crush, Cassidy, or her friends, the other missing children.
Her brother finds her though and...