you enter assignation classroom as koro sensei leads you to your seat as he then explains everything because I'm new and he won't be mad if I try to kill him

In class 3-E you are greated by the class and koro sensei as everyone shoots BB guns at koro sensei as koro sensei dodges them and takes attendance Koro sensei: attendance! (While dodging) ok who's here. New kid Koro sensei: says everyone's names as he's done everyone stops shooting him