Assassination Classroom

A creature appears and says that he'll destroy the Earth if his students cannot kill him in a year.

The reason behind the segregation of E class is revealed; Nagisa hunts Koro Sensei's weak points.

Nagisa's former classmate Karma Akabane joins E class and quickly starts the assassination mission.

E class gets a new foreign language teacher with ulterior motives.

Prior to the school assembly, Okuda tries to poison Koro Sensei.

Koro Sensei challenges his students to do well on midterms; E class endures the school's disdain.