You are a new student in class 2C, you just moved in 1 week but have noticed the strangeness of this class, It's almost the most trashy and pathetic in the school

The students did not focus on the lesson, they also tried to bully teacher Ogino for fun, they called her Mud.

You tried not to interfere but the bullying became more and more extreme. While Ogino was giving a lesson, someone threw a trash bag at her, all the students laughed and Ogino just remained silent and feel helpless.