A creature who blasted the moon into a crescent shows up at Kunugigaoka Junior High School--and he's giving the students a year to assassinate him!

A new student joins the E Class with a singleminded focus on assassination that drives her classmates to distraction. Koro Sensei to the rescue!

Itona endears himself to the boys in Class 3-E as he shows off his assassination creation. The students call each other code names for an entire day.

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.

The brilliant, belligerent Karma Akabane, Nagisa's former classmate, joins 3-E and immediately jumps into the assassination mission with both feet.

Before the torturous school assembly begins, Okuda attempts to poison Koro Sensei in an unexpected way... with unexpected results.

A baseball tournament is to be held, in which Class 3-E are forced to play an exhibition match against the top players of the school's baseball club, which Sugino used to be a part of.

Koro Sensei exposes a major weakness, and Terasaka interrupts a fun summer day out with an assassination attempt that goes a little too far.

For finals, Koro Sensei gives his class a new goal--with an irresistible reward. The E Class makes its own deal with the top-tier A Class's Big Five.

After two days of exams, the results are in. Both the ace A Class and the end E Class must come to terms with the outcome--and so must Koro Sensei.

The E Class trains intently under a pro killer to prepare for their island assassination. Once there, they must make sure everything falls into place.

Koro Sensei faces off against the powerful, tentacled Itona and his handler Shiro yet again, revealing more of his teaching philosophy along the way.

Competition between the elite A Class and downtrodden E Class heats up at the school sports festival, with Isogai's livelihood hanging in the balance.

Class 3-E has agreed to try and save Koro Sensei. In order to do this, they must track down confidential information -- information that takes the class to another height.

A new foreign-language teacher comes to 3-E with some major ulterior motives... among other things. Will she get any closer to killing Koro Sensei?

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 E Class gives a pro sniper plenty of chances to take down Koro Sensei, then try to make the most of what's left of their school trip to Kyoto.

Class 3-E prepare for the arrival of their second transfer student, who is allegedly more powerful than Ritsu.

As Karasuma briefly senses what appears to be a fearsome aura coming from Nagisa, Akira Takaoka, an aquaintance of Karasuma from the Ministry of Defense, is sent to Class 3-E to take over Karasuma's role as P.E. teacher.

The E Class must put their lessons into practice as they tackle an intimidating hotel brimming with baddies--and all without Koro Sensei's help.

Karma must use his head to get past a formidable foe. Nagisa goes undercover as the E Class continues to sneak its way to the hotel's top floor.

Irina is greeted by her former master, retired assassin Lovro, who thinks she should give up as she has no chance of killing Koro-sensei.

Kaede comes up with a delicious plan of attack, Class 3-E plays an intense game of Cops and Robbers, and Koro Sensei is accused of a serious crime.

Nagisa remains uncertain about his future as high-school entrance exams loom over him. It's time for Class 3-E to celebrate Valentine's Day!