Chapter 145
- The bell rang in Tokyo Metropolitan Nishi High School, and Class 1-A was already in their classroom, waiting for their Mathematics Teacher.
- Sakamo Ryu entered, and while the students were wondering who was that young man who was going to the Teacher's desk, he smiled at them.
- Sakamo put his bag on top of the desk and placed himself in front of the whiteboard. “Good morning students. I am your temporary Teacher, Sakamo Ryu. You may call me Sakamo-sensei. I will be your Math Teacher while Teacher Kaishu Katsu is on leave because of his new baby."