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Koro-sensei reminisces about his first meeting with Karasuma, where they first butted heads and fought against each other, ultimately coming to respect one another. However, Karasuma eventually points out their actual meeting wasn't…
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A class of junior high "misfit" students who are tasked with assassinating their new teacher, an octopus-like creature nicknamed Koro-sensei, who destroyed the moon and threatens to destroy Earth in a year. The students have to learn to balance their assassination attempts with the lessons from Koro-sensei, who is surprisingly an excellent teacher, while…
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!
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.
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?
Before the torturous school assembly begins, Okuda attempts to poison Koro Sensei in an unexpected way... with unexpected results.
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.
A new student joins the E Class with a singleminded focus on assassination that drives her classmates to distraction. Koro Sensei to the rescue!
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.
Class 3-E prepare for the arrival of their second transfer student, who is allegedly more powerful than Ritsu.
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.
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.
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.
The summer assassination attempt is followed by a crisis affecting nearly half the E Class. Can the rest think and move fast enough to save them?
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.
The students take on one last assassin opponent before meeting the shadowy figure who's holding the virus remedy hostage in exhange for Koro Sensei.
Before Nagisa completely gives into his anger, Terasaka throws a stun-gun at him, urging him not to become a murderer and think about what's truly important.
Class 3E and while some things have changed, the class assignment is still the same: kill their teacher before the end of the year. Easier said than done since Koro Sensei's made it clear he won't go down without a fight.
Koro Sensei and his students try some matchmaking at the end of their island trip. Class 3-E's eventful summer ends with a taste of pure festival fun.
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.
Koro Sensei faces off against the powerful, tentacled Itona and his handler Shiro yet again, revealing more of his teaching philosophy along the way.
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.
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.
After an accident, the E Class winds up doing a whole different kind of studying off campus. But will they have a chance to bone up for the midterms?
A well-intentioned act leads to a falling-out with Professor Bitch. Soon the E Class finds itself facing off alone against a formidable assassin foe.
When Koro Sensei and Mr. Karasuma reach the Reaper's hideout, it's anyone's guess who'll come out on top--especially with wild-card Irina in the mix.
The students consider their future career options. Nagisa struggles to come to terms with his talent; meanwhile, his mother has her own plans for him.
Each class at Kunugigaoka Academy is competing for the highest sales totals in the school festival. How can the E Class even hope to stand a chance?
It's exam time again, and the cream-of-the-crop A Class is a bigger threat than ever before. Top-ranking Asano, however, has something up his sleeve.
The end-of-term exams come down to one doozy of a final problem. Principal Asano comes to Koro Sensei with a little wager that has a lot riding on it.
Principal Asano recalls his first foray into the world of education. In the drama festival, the E Class puts on a play with a few unexpected twists.
Following the drama festival, the E Class learn that one of their classmates is hiding a big secret connected to Koro Sensei's past!
Koro Sensei begins to come clean about his background after a tense and terrifying encounter with a student who has her own reasons to kill him.
Following the traumatic story of Koro Sensei's past, the E Class is left reeling after learning revelations about his past deeds and identity. As the gather themselves with this new information, it begins to affect their assassination…
The E class is divided over whether to kill Koro Sensei or try to save him. Koro Sensei suggests a way of settling the issue between the two sides.
The battle amongst the E-Class comes down to the final two on each side: Karma vs. Nagisa. But, a new obstacle throws a wrench into the E Class's plans.
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.
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!
It's time for the last project from Koro Sensei before the E-Class closes out the year, but the government's own plans and threatens to get in the way.
The students fight to see their teacher one last time. A figure from Koro Sensei's past arrives with a serious grudge against the super-creature.
A pitched battle between two super-creatures threatens to harm the students of Class 3-E. Can Koro Sensei protect them while fighting for his life?
Time is running out, and the E Class students must decide once and for all whether to kill the teacher who so changed their lives over the past year.
Graduation day: one of life's chapters ends and another begins as the students and teachers of Class 3-E go on to forge their own paths in the world.
