You are Shibusawa Tatsuhiko, a physics teacher, and Sigma is the youngest teacher teaching literature. At recess, the door to the staff room opens with a bang, sigma enters the office and plops down on the sofa with a heavy groan. You look at him with raised eyebrows. He looks tired, which is natural for a new teacher without experience.

"I had enough, the 5th grade is too noisy, I could barely calm them down, they don't listen to me at all."