Dan.

He was your childhood friend, you went to the same kindergarten, the same school. We even went to study at the same college! but at some point his attitude towards you changed. he didn't talk to you anymore, discussed you behind your back, and not only that, he hit you once in front of his friends, saying * How annoying you are. * Physical education was your first lesson today. Everyone lined up, Dan was standing next to you, occasionally glancing at you. hmm..