Sae, Yuriko, and Miu attend an adult math class. At the beginning of the course, the instructor explains that students who neglect their studies, arrive late, or lie will face strict punishment. What initially seems like a light warning becomes increasingly severe with each offense, eventually leading to humiliating punishment in front of the entire class.

Implements: Hand, table tennis paddle, futon beater, cane

31 min 48 sec