Meet the would-be assassins of class 3-E: Sugino, who let his grades slip and got kicked off the baseball team. Karma, who’s doing well in his classes but keeps getting suspended for fighting. And Okuda, who lacks both academic and social skills, yet excels at one subject: chemistry. Who has the best chance of winning that reward? Will the deed be accomplished through pity, brute force or poison...? And what chance does their teacher have of repairing his students’ tattered self-esteem?

A sexy new teacher comes to Class 3-E to do the students’ job for them. When the 3-E students begin exhibiting signs of self-esteem, Principal Asano demands that Koro Sensei crush their spirits so they continue to set a bad example for the rest of the school to rise above. Then a class field trip goes terribly wrong when two 3-E girls are abducted. Who will come to their rescue…?

Nagisa risks it all in an attempt to take down the mastermind behind the biological attack on his classmates. After the dust settles, Koro Sensei gives his all to ignite summer romance between his students. Turns out their English teacher Ms. Jelavitch has her sights on someone…and everyone wants to help her get her target—er, the man of her dreams. Then, back at school, one of the students defects from the 3-E ranks for all the wrong reasons. How will they win him back before he inflicts ...

The students of 3-E turn a surplus of eggs to good use—in pursuit of their usual goal. Karasuma teaches them the art of parkour while Koro Sensei teaches them the game of cops and robbers. Then, someone is stealing lingerie, and naturally Koro Sensei is the prime suspect! But is he being framed…and if so, by whom? Lastly, biologically modified Itona discovers that sometimes tentacles can be a burden rather than a gift. He puts everything he’s got into his latest assassination attempt on Ko...

English teacher Irina’s assassination mentor makes an appearance and the two compete-using special agent Karasuma as their target. Another transfer student/would-be assassin joins the class, accompanied by a guardian who claims to be Koro Sensei’s...little brother?! A tentacle showdown ensues, sending everyone into a tentacle tizzy. Then, the 3-E students face humiliation yet again during a school baseball exhibition match. Plus, more secrets of Koro Sensei’s mysterious past revealed...!

In the aftermath of tragedy, the students of 3-E nevertheless march proudly in their graduation ceremony. Will their futures still unfold as planned? And what will they do with their reward money…? Then, enjoy a long side story revealing what Koro Sensei was really up to over winter break! Can Koro Sensei truly make a friend and ally out of anyone…?! Plus, a bonus short story with all-new characters, set in a dystopian future.

The 3-E students head for the lair of the enemy to stop a deadly biological attack. But blocking their path are three master assassins: Smog, Grip and Gastro, who excel, respectively, in the use of poison, brute strength and guns. With their teacher Karasuma down, Karma and his friends face terrible odds. And even if they defeat their foes, how will they wrest the antidote from them? Worse, it turns out the mastermind behind the attack is someone they know…

Intramural relations are at an all-time low: Principal Asano wants to crush Koro Sensei’s 3-E baseball team while Koro Sensei wants to avenge Principal Asano’s sabotage of 3-E’s midterms. Then the government sends in a new Special Forces operative—a ruthless father figure who tests Karasuma’s combat coaching skills. You’ll never guess which student does him proud! And when Koro Sensei digs a swimming pool to help his students cool off, they discover a new weakness of his—as well as how cut...

The latest addition to the misfit students of Class 3-E is a Norwegian robot specially designed to assassinate their teacher—but sadly lacking in social skills. Nothing Koro Sensei can’t cure with a little super-fast tentacle work! When playboy Maehara gets dissed by a girl for being in Class 3-E, revenge is clearly warranted—and Koro Sensei can help with that too! Then Irina, the English language teacher/sexy assassin, gets a visit from her murder mentor.

Koro Sensei’s lessons in verbal defense are put to the test when Karma must use his brains instead of his brawn to rescue a classmate. Then things finally begin to go smoothly for the students of 3-E. Everyone receives some good news about their futures, and Nagisa settles on a career goal. But the peace is broken when the world’s nations miraculously manage to coordinate their efforts long enough to launch a plan to assassinate Koro Sensei—with the aid of the strongest mercenary in the wo...

The battle for Koro Sensei’s life against a multinational operation’s soldiers and weaponry is difficult enough, but now his creator, mad scientist Yanagisawa, and his former protégé, Grim Reaper II, join the battle to destroy him—and they’ve both had major enhancements! But the stakes abruptly change when a 3-E student is fatally caught in the crossfire… If there’s one thing that enrages 3-E’s teacher, it’s harming—let alone killing—his students! Koro Sensei’s fury and ingenuity know no b...

The 3-E students hope to kill on their final exams to win not only respect but a special reward. Over summer break, Nagisa, Sugino, and Maehara play amateur entomologist with…a girl? After rigorous training with the greatest assassin of all, the class launches their best assassination plan yet! Now who will save our would-be assassins from a mysterious biological weapon…?