ASSASSINATION CLASSROOM

An immensely powerful, alarmingly whimsical creature dubbed Koro Sensei vows to blow up the Earth, having already vaporized a sizeable chunk of the moon. Governments have attempted to kill him, naturally, but shrink at his ungodly speed and fetish for cleanliness.

Sugino, a self-conscious would-be pitcher, attempts to assassinate Koro Sensei by imitating a favorite major leaguer, only to fail miserably. Assessing the boy with his hyper-sensitive tentacles, Koro offers him some poignant advice on being his own person.

Reporting to E Class after his extended suspension for violence against a teacher, sociopath Karma quickly puts Koro Sensei on edge. Getting closer than anyone else to actually assassinating their teacher, it appears the clever delinquent might just pull it off, but the tentacled cipher is not only patient, but dedicated to turning Karma's life around.

Smoldering temptress and international assassin extraordinaire Irina Jelavic joins the team under the pretext of teaching language arts. Not prepared for how tricky Koro Sensei is to kill, the cocky vixen finds herself at a loss when expected to actually teach.

Koro Sensei teaches a valuable lesson to a shy student with high marks in chemistry but zero aptitude for the finer points of communication. Later, after the E Class gang makes a hazardous trek to the main campus for special assembly, Nagisa and the others find themselves the laughing stock of the whole school -even the Dean.

In preparation for midterms, Koro Sensei "splits" himself into multiple versions, each one tailored to a specific student. When the principle puts in an appearance, reinforcing his less-than-charitable view of E Class' function in the academy's overall plan, Koro Sensei is bound and determined to make sure his students understand the value of a backup plan.

When E Class goes on a field trip, Koro Sensei makes sure they're prepared. His enormous guidebooks composed especially for the occasion cover every conceivable travel scenario, from souvenir bargain shopping to couple spotting. When several of the students are kidnapped by a group of thugs one of them used to know, however, Koro Sensei's insane preparedness comes in quite handy.

Continuing their field trip to Kyoto, the gang tries to lead Koro Sensei into the crosshairs of mercenary sharpshooter, Red Eye. As each attempt fails miserably, the seasoned sniper loses hope. Later, an encounter with Koro Sensei persuades the man to pack it in and see the world.

The class marvels over a new "transfer student" from Norway, a piece of military tech fitted with cutting-edge AI. Able to calculate Koro Sensei's moves and improve on her assassination approach exponentially with each attempt, AIFA makes life difficult for everyone as she continually sprays the classroom with BBs. Koro Sensei, however, has an idea to help everyone become friends.

Irina's menacing teacher, Lovro, shows up to challenge his pupil's qualifications for offing Koro Sensei. To prove her worth to him, Koro Sensei proposes a sham assassination competition between the two -with a reluctant Karasuma as their target.

An intense young boy claiming to be Koro Sensei's brother shows up and challenges him to a death match. With a mysterious guardian in tow who appears to have considered all the angles, the boy further throws off his prey by revealing that he, too, has tentacles. Driven to exhaustion by an opponent who may just be his match, Koro Sensei finds himself fighting for his life.

A "friendly" exhibition ball game between E Class and the baseball team gets intense when Koro Sensei teaches his students how to bunt star player Shindo's celebrated fastball. Not one to let the untouchables be victorious, the Principal steps in to teach Shindo and teammates an object lesson in manifest destiny.

An old colleague of Karasuma's steps in to teach gym class. At first, his teaching style seems friendly. he bribes the students with treats, chews the fat with them like one of the gang, insists on being thought of as Dad. But when the gang politely questions his twelve-hour-a-day curriculum, out comes the man's dark side.

Resentful of seeing his former cronies swept away by Koro Sensei's "can do" attitude, shiftless Terasaka is himself swept away by Shiro's elaborate plan to exploit Koro Sensei's greatest weakness: water.

As incentive for acing the finals, Koro Sensei offers one free tentacle-shot per outstanding student. When A Class gets wind of E Class intention to close the gap, star pupil and principal's son Asano devises a way to keep the upstarts in check and learn what his father's hiding.

E Class steps up to the challenge of finals with surprising confidence, beating out A Class for the top spots in almost every subject. Karma learns a valuable lesson about the cost of his lackadaisical attitude. The principals son takes his licks, but plots revenge.

While hunting beetles, the gang stumbles across Okajima’s ingenious porn trap. Later, with the Okinawa trip in full swing, the class splits into groups and takes turns distracting Koro Sensei while the others make preparations for the big assassination attempt.

The class unveils their master plan to assassinate Koro Sensei and very nearly succeed, only to discover their target's Absolute Defense Form. Rendered immobile but effectively invincible for a period twenty-four hours, Koro Sensei congratulates the gang on their effort.

The gang infiltrates the poisoner's hotel en masse, attempting to steal the antidote. En route, Irina distracts a cadre of guards with her flawless rendition of Chopin, much to everyone's astonishment. A man Yuma recognizes as their waiter that morning gases Mr. Karasuma, but the special ops warhorse survives to take the madman down.

Karma takes Grip by surprise when the latter attempts to gas him. Proceeding toward the top floor, the gang must navigate through an obnoxious club to unlock access to the next level. The girls insist they'll be less conspicuous than the boys and opt to go alone, but dress Nagisa up in drag as a precaution.

Under fire from the insanely precise Gastro, the gang figures out a way to take out the gunman without actually shooting him. As they ascend to the hotel’s first floor, it occurs to them that, based on how he’s used his hit-men thus far, the mastermind cannot be an assassin.

The gang watches on in horror as Takaoka baits Nagisa into a murderous one-on-one. Drawing deep, Nagisa nevertheless gets the upper hand without having to kill him. The gang learns that Takaoka’s hired assassins betrayed their overzealous employers. their friends only suffer from acute food poisoning. As things settle back into the semblance of normalcy for E-Class, a new term begins.