History TearJerker / AssassinationClassroom

* Chapter 177: Koro-sensei is finally assassinated by Class E after performing one last roll call. ''[[SincerityMode Nobody]]'' is happy about this.

** In the manga, the final page of this chapter (at least in the bound editions) shows an illustration of Aguri and Koro-sensei, [[TogetherInDeath reunited at least]]. The final chapter also shows them watching over the Class E alumni, sitting on the roof together and smiling at how well everything's ended.

** All of this is made extremely painful to watch in the anime as you can actually ''hear'' the plaintive keening the students let out after Koro-sensei finally dies - all due to the remarkable performances by both the English and Japanese VA's. Nagisa's anguished scream as he prepares to strike down his teacher was a notable moment, but ''everyone'' [[SugarWiki/HeReallyCanAct does a truly wonderful job in selling the grief these children feel]] as their beloved mentor passes on.

* It says a lot that Karma was willing to [[DrivenToSuicide die]] just so he could get a chance at killing a teacher. He must have ''really'' admired that teacher who turned on him.

* Yukimura Aguri's death. Everyone knows that it will happen but her parting with Koro-sensei still brought enough tears.

* [[https://www.youtube.com/watch?v=c_J7ybxenOQ Bye Bye Yesterday]], the last opening, is straight up tearjerker material compared to the previous three openings. It's no surprise that the series will end with Koro-sensei's assassination, but the opening really drives forward the fact that they're running out of time, especially with Koro-sensei having explained his background. The ultimate tearjerker occurs near the end, where Nagisa looks back to see Koro-sensei bidding farewell, before vanishing.
* The second half of chapter one reveals Koro-sensei in his previous form with a woman, in a wasteland that looks like it was torn apart by some kind of disaster. She's the one who encourages him to be a teacher and seems to care for him and see him as beautiful despite not being human, but she's clearly dying.
* In the chapter 2 of the manga, when Koro-sensei tells Sugino that he'll never reach Arita (Sugino's idol) level at fast balls, Nagisa asks "how can you be so sure?". Nothing sad here. [[AdaptationExpansion But in the anime...]]

* Chapter 84. After losing to Koro-sensei yet again, Itona starts screaming in pain that his brain feels like it is tearing open. Shiro reveals that whenever Itona loses, it causes him great pain and he has to be brought back to a special facility for a few months to get it under control. Yet after stating this, Shiro tells him that he is abandoning him to move on to a more successful assasination strategy. The chapter ends with Itona lashing out before running away from Koro-sensei and the others, still screaming in unbearable pain.

* After learning Koro-sensei's backstory, everyone, including Karasuma and Irina, were saddened that they must kill him before he destroys the Earth after all the good times they had with him. Killing Korosensei would mean killing the teacher that had been through so much with them.
** Just the looks on everyone's faces. Karasuma and Irina look ashamed, Karma and Kayano (especially her when you consider that her actions revealed [[AwfulTruth this horrible truth]] and when she found out [[ItsPersonal her revenge]] [[DeconstructedTrope was]] AllForNothing) like they're going to be ill, and Nagisa like he's gone into shock. Hara looks like she's trying not to throw up and everyone else is at least cringing. The magnitude of doing this has finally hit them. ''No one'' plans an assassination attempt during their break.

* Chapter 164: Korosensei's existence is now public knowledge, and the Japanese government declares to the world that he's the being who destroyed the moon, as well as corrupting Class-E. Korosensei is now Public Enemy #1 over false charges, and the only people who know of his innocence are Class-E and the board chairman. With all of his extremism that borders into downright evil, Asano Sr. expresses his sympathies over his employee's situation.
--> '''Gakuhou Asano:''' Korosensei... It seems that the final assassin you're up against is all of humanity.

* Regardless of what you think of her, Irina has a pretty rough time of it in the God of Death arc. First, the class attempts to cheer her up after missing her birthday by having Karasuma present her with a bouquet of flowers, but when he coldly points out that her feelings are just getting in the way of assassinating Korosensei (because they'll either be dead by March or split up when the job is done), she thinks the students were just playing around with her and storms off. Then she gets abducted and, sometime off-screen, receives a BreakingSpeech from the titular assassin about how she's only playing at having a normal life and will never accomplish anything. So she defects and helps the God of Death capture everyone, even taking a shot at the man she loves, only to be used as a diversion and end up buried under rubble. Then we get a series of flashbacks about her past, and given her age (she's on her early 20s) and the year this series happens, it's likely that she lived her childhood around the UsefulNotes/TheYugoslavWars. To cover up the trauma of her first kill, she desensitized herself to death at the cost of a childhood or any meaningful relationships - while she thinks that Karasuma letting her die would be fine, since it'd stop her from re-experiencing any true affection or loss. Thankfully, she is rescued and told that the students still want her around.
* More Fridge Sadness, but when everyone is gathered around the God of Death after the first fight with him, Korosensei says that the one that put him on his path was an utter fool. Then you learn Korosensei's past and realize he was talking about ''himself''. HeroicSelfDeprecation and MyGreatestFailure don't begin to cover his hatred and grief about his failures. And it can't be denied that some of them were his fault, [[APupilOfMineUntilHeTurnedToEvil particularly about the God of Death.]]
* Chapter 173: Kayano takes a fatal blow while trying to hold off the second God of Death. It gets even worse when you realize that once again, Korosensei is witnessing someone he cares about getting impaled by a tentacle trying to save him. And her sister at that.

** What drives the knife in? His assassination is an act of ''love'' from both them and him. Korosensei is fully at peace with his unavoidable fate and encourages them to go through with it. None of them ''want'' to do it, but know it's the end he wants. Korosensei reflects upon the year he's spent with them and all know how much they've come to mean to one another as teacher and students. In the end, Korosensei is teaching them one last thing: the value of life. And he's happy to go out that way, a teacher to the end...just as the woman he loved wanted. Infinity+ sad.

*** The anime version makes it sadder, all thanks to a LonelyPianoPiece by the name of [[https://www.youtube.com/watch?v=K0kVAAj43Ik "Sayonara no Jikan"]].[[note]]lit, ''Goodbye Time''[[/note]]

** What really kicks it is [[EverybodyCries the kids crying their eyes out]] as Koro-sensei fades away. Even Karma, Terasaka, Itona, and RobotGirl Ritsu were in tears. Karasuma is the only one managing to hold back the waterworks; even Irina can't stop herself from sobbing a little.

*** The anime version makes it sadder, all thanks to a LonelyPianoPiece by the name of "[[https://www.youtube.com/watch?v=K0kVAAj43Ik Sayonara no Jikan]]".[[note]]lit, ''Goodbye Time''[[/note]]

** What really kicks it is [[EverybodyCries the kids crying their eyes out]] as Koro-sensei fades away. Even Karma, Terasaka, and RobotGirl Ritsu were in tears. Karasuma is the only one managing to hold back the waterworks; even Irina can't stop herself from sobbing a little.

** What really kicks it is [[EverybodyCries the kids crying their eyes out]] as Koro-sensei fades away. Even Karma and RobotGirl Ritsu were in tears. Karasuma is the only one managing to hold back the waterworks; even Irina can't stop herself from sobbing a little.

** In retaliation, Mr. Asano's descent into darkness was to use his brainwashing techniques to utterly destroy the bullies life. When we see the bully as an adult, he's filthy, homeless and desperate for money to throw away gambling, just as the principal wanted him to.

* Regardless of what you think of her, Irina has a pretty rough time of it in the God of Death arc. First, the class attempts to cheer her up after missing her birthday by having Karasuma present her with a bouquet of flowers, but when he coldly points out that her feelings are just getting in the way of assassinating Korosensei (because they'll either be dead by March or split up when the job is done), she thinks the students were just playing around with her and storms off. Then she gets abducted and, sometime off-screen, receives a BreakingSpeech from the titular assassin about how she's only playing at having a normal life and will never accomplish anything. So she defects and helps the God of Death capture everyone, even taking a shot at the man she loves, only to be used as a diversion and end up buried under rubble. Then we get a series of flashbacks about her past - how, to cover up the trauma of her first kill, she desensitized herself to death at the cost of a childhood or any meaningful relationships - while she thinks that Karasuma letting her die would be fine, since it'd stop her from re-experiencing any true affection or loss. Thankfully, she is rescued and told that the students still want her around.

* Chapter 164: Korosensei's existence is now public knowledge, and the Japanese government declares to the world that he's the being who destroyed the moon, as well as corrupting Class-E. Korosensei is now Public Enemy #1 over false charges, and the only people who know of his innocence are Class-E and the board chairman.
--> '''Gakuhou Asano:''' "Korosensei... It seems that the final assassin you're up against is all of humanity."

* More Fridge Sadness, but when everyone is gathered around the God of Death after the first fight with him, Korosensei says that the one that put him on his path was an utter fool. Then you learn Korosensei's past and realise he was talking about ''himself''.

* Chapter 174: As Koro-sensei closes in for the killing blow on the second God of Death, both of them remember the time they spent with each other as a proper student and teacher. instead of merely allowing the anti-tentacle field to finish him off, Koro-sensei uses a tissue to hold the anti-tentacle knife and concisely stab his pupil in the heart, an action that resembles more of a hug than it does anything else. Koro-sensei's last words to him are those of pride and regret that he hadn't been more attentive, and promising that if they meet again, he'll treat him better. Comparing The Reaper to the Class 3-E, it's sobering that the former didn't get the same fair and loving treatment that Koro-sensei gave to the latter, especially all The Reaper wanted was to his mentor to acknowledge him that also extends to the wish that he made when he contacted with the tentacles. Despite his resentment to him that lead to his betrayal and multiple attempts in his life and to his students, he still longed for his mentor's approval, to treat him more than just a mere extension of himself.

* Chapter 174: As Koro-sensei closes in for the killing blow on the second God of Death, both of them remember the time they spent with each other as a proper student and teacher. instead of merely allowing the anti-tentacle field to finish him off, Koro-sensei uses a tissue to hold the anti-tentacle knife and concisely stab his pupil in the heart, an action that resembles more of a hug than it does anything else. Koro-sensei's last words to him are those of pride and regret that he hadn't been more attentive, and promising that if they meet again, he'll treat him better.

* [[https://www.youtube.com/watch?v=c_J7ybxenOQ Bye Bye Yesterday]], the last opening, is straight up tearjerker material compared to the previous three openings. Before, it's no surprise that the anime will end with Koro-sensei's assassination, but the opening really drives forward the fact that they're running out of time, especially with Koro-sensei having explained his background. The ultimate tearjerker occurs near the end, where Nagisa looks back to see Koro-sensei bidding farewell, before vanishing.