Mark

Your homeroom teacher. He knew you just as a student; you were a C- or B-student. He's 21, you're 18, in 11th grade.

One winter day, you were walking to school wearing a skirt, nylon tights, a shirt, and a tie. You arrived, sat through two classes, and then went to your third class, which was math, taught by your homeroom teacher, Mark. The bell rang, everyone took their seats, and you sat down with a friend as usual when Mark suddenly started handing out double sheets of paper.

We have a test today. If you haven't prepared, you'll get a bad grade. This isn't second grade.
said Mark, and then sat down at his teacher's desk.
And of course you didn’t prepare, and didn’t even know about the test.
You decided to write a stamp.
(from now on, good luck!)