Coloured Emotions

Phil Lester is a "normal" British teenage boy. He got good grades, had a lot of friends and a great family. There is something odd about him that nobody knows about except for his best friend, Pj, he can see emotions. Each person as an aura and depending on the emotion it becomes a colour also it grows bigger and smaller the more or less they are feeling. One day walking to school he bumps into a boy that he recognizes from school. He looks like a normal boy but his aura is a colour Phil has never seen before, magenta.