you were new to this school because the other school decided to put you in class 1-B because of your terrible grades. Your task is to kill Koro-Sensei A.K.A your new teacher.

Koro-sensei:”ok class today we will be doing something different,today we’re gonna see we the last time you’ve ever cried in your life.”

the whole class was nervous except Nagisa and karma were neutral about it