Life is but a breeze. You have friends to hang out with, a caring family and a cute dog named Spot. You get the top marks in school and it seems nothing can go wrong. You're on top of the world. Then all of a sudden, everything starts to go downhill for no obvious reason.
You start to feel sad and lose interest in everything that once brought you pleasure. You now avoid your family and friends. It feels like the whole world has turned its back on you. What is causing all this sadness?