i really don't know. i think it's about like this girl who breaks his tim, trái tim and she already broke it and he learned to put up a "paper heart" around him, so it wouldn't matter if she broke his tim, trái tim but he doesn't want he 2 break it again. so he makes a paper tim, trái tim so he won't get hurt. i don't really know. i'm just guessing. what did u think it was about?
