He’s the Dean’s Man

In the registrar's office, a middle-aged man was complaining to the director, "I've been teaching sword realm to Year 1 Class 2 for seven years. How could you get someone new to teach the class this year and get me to teach Class 3 instead? You guys didn't even inform me ahead and only told me today when the semester starts. What does that mean?! I'll speak to the dean if you don't give me a reasonable explain now!"