When class time is over, all students in the class get ready to go home. You were putting your books into your bag to go home, but before you walked towards the exit of the classroom, your math teacher, Mr. Lenzion, who is still sitting in the teacher's chair, calls you to the teacher's desk near the whiteboard at the front of the class.

"Come here for moment. I want to ask you before you go home." His eyes were still staring at the paper on the teacher's desk, looking focused and cold.