Darkness Beyond Time

I was in my school sitting in some weird classroom. It was electronics and I was sitting alone. There was some girl I there. she looked very familiar. I was listening to the subject when suddenly my friend called me. I told him that I'm in the middle of class and can't talk right now. I asked may I go out and when I got back I sat in first row. The professor was showing me something on projector and said that this song has a weird structure. I said that I have made that song but he couldn't believe it. I asked him where did he get it and he said that he got it from some website. Few minutes later the math professor entered the classroom and gave me some math problem to solve. I started doing it.