In college, because it's too cold! I overslept once, and there were still three minutes before class. I was sure to be late, so I called immediately.

This is guilt. If you feel bad, you can confess to the counselor. No big deal. Maybe he or she still thinks you are an honest boy. Of course, it doesn't matter if you are late. You can walk in quietly or walk in aboveboard. No one will care too much, and the teacher will not remember you. After all, I still have to go to class, even if I am a few minutes late!