I had to start a second run, because in the first run I was very confused about what's going on. The reason was, I went to school and I interacted with the letter on the table first, which progressed the game. So I had absolutely no idea, who Ann is/was. I know you ran out of time, but as a suggestion, let Ann talk to the character directly when entering the room. Kind of "You are late, sit down and let's start the lesson." So that it's not possible to miss that information.
Overall the music is very fitting, a small, sad story game with a 100% SNES feeling.