With the students in the process of deciding on their future careers, Nagisa ponders whether he should become a professional assassin, to which Koro-sensei tells him to give it more thought. Later, Nagisa's obsessive mother, Hiromi, tries to have Nagisa move out of E Class, becoming hostile when he says he wants to stay. The next day, Koro-sensei is forced to pretend to be Karasuma for a parent-teacher meeting with Hiromi, stating he will not let Nagisa leave E Class if he doesn't want to. Unwilling to take no for an answer, Hiromi drugs Nagisa and tries to have him set fire to his classroom in order to sever his connections with E Class. However, when a whip-wielding assassin targeting Koro-sensei attacks, Nagisa uses his skills as an assassin to take him down and protect his mother. As Nagisa decides to pursue a career besides assassination, he decides to work hard to support her mother, who lets him stay in E Class.