Time for midterms! Koro Sensei gives his aspiring assassins an ultimatum as they battle a grueling test and the disdain of the rest of the school.

The students go on a school trip to Kyoto, where they must still keep assassination foremost in their minds. Kanzaki faces trouble from her past.

The reasoning behind the E Class’s segregation is revealed. Nagisa tracks Koro Sensei’s weak points in the hopes of using them to take him down.