This is a cliche story...
It's about a girl. They thought she is cheerful. They thought she is confident. They thought she is too hard to break. Yet, they don't know the real her. The feelings she have that she can't show. The tears of sadness that only falls when she is in the four corners of her room. Her dreams she want's to share but is too afraid of rejection. The words she longs to say. The anguish that she hides. The hatred and envy that her heart holds. The disgusting things she did.
Nobody knows that she's hiding her rotten self with a cheerful smile.