YMMV: Assassination Classroom

aka: Ansatsu Kyoushitsu
  • Alternative Character Interpretation:
    • Is Nagisa a bloodthirsty sociopath who constantly hides his true nature behind a gentle exterior? Or is he a genuinely kind student who unknowingly has the skills and mindset of a professional assassin? The series supports the latter interpretation, but after seeing what he's capable of, it's hard to be perfectly sure…
    • In a surprising turn of events, the former interpretation becomes true for another character: Kaede Kayano, also known as Akari Yukimura, at least while she was under the tentacles' influence. However, fan interpretations still vary because it's not entirely clear how much of her personality was an act and how much of it were her based on her true feelings.
  • Angst? What Angst?: There seems to be a narrative event horizon between the major action parts of the story and the rest of it. No matter how many times or how seriously the kids are threatened with death, they shrug it off afterwards with nary a mention.
  • Anti-Climax Boss: How some people felt about the God of Death when he was defeated. And they tend to forget how far he actually came.
    • It's later justified with The Reveal that the "God of Death" was merely a disciple of the original assassin, Koro-sensei, who took on his name and reputation after betraying him.
  • Arc Fatigue: How some fans think about the God of Death arc, which lasted around thirteen chapters.
  • Audience-Alienating Premise: Even though the series is a light-hearted sci-fi comedy with a Crazy Awesome Save Our Students plot, it does hinge on a classroom full of kids learning how to kill their teacher with guns, knives, and the occasional explosive. Obviously, it won't fly high in North America and other countries with histories of student rampage. Emphasis on "high": No Export for You has been (for now) averted.
  • Author's Saving Throw: Koro-sensei turning out to be the true God-Of-Death is seen as this for some people who were disappointed that the "fake" one seen in the God-of-Death arc was hyped up only to be an absolute joke by the time the arc concluded.
  • Badass Decay:
    • The God-of-Death loses a lot of his Badass aura as the chapters moved along with The Reveal that both people he "killed" on-panel turned out to be alive and well. Chapter 133 offers an explanation: it turns out he wasn't the real deal that Lovro spoke of. The true God of Death was Korosensei.
    • Kayano being taken out early in the early stages of the class civil war (chapter 145 to be more precise) can be considered this. However, given the fact that she had just recently recovered from the side effects of the tentacles, this can be considered a Justified Trope.
  • Complete Monster: Akira Takaoka is a brutal military trainer known for torturing his students with sadistic relish while he breaks them mentally. During his brief stint as Class E's trainer, he is willing to brutalize any unruly student (and not just the boys). After being ousted, Takaoka devotes himself to revenge. After stealing money to buy a bio-weapon and hire hitmen, he infects Class E with a virus to cause a horrifyingly painful death as they slowly suffocate under the weight of tumors. The few students who escape this fate are targeted for even worse fates as Takaoka intends on burying a girl named Kayano alive in cement in a bathtub full of material lethal to the kids' teacher Korosensei, which would force him to sacrifice his life to save her. To drive in his victory, he even destroys the antidote while gloating he might use the money to purchase middle-school aged kids to murder on a regular basis as some twisted celebration.
  • Critical Research Failure: Mach 20, or twice the speed of sound. Mach 1 is the speed of sound.
  • Ear Worm: "Youth Savage Theory", the anime's first opening theme tune, has a very catchy beat.
  • Ensemble Darkhorse: The Japanese otter that appeared in chapters 56 and 88. It's placed 7th in the first popularity poll with 71 votes.
    • Karma, who ranked first in the popularity poll of volume 12.
    • Isogai, who ranked sixth in the popularity poll of volume 12, making him the most popular character outside of the main trio of students and teachers. Besides this, both him and Maehara are the only other two students who sing the two opening themes with the main trio for the anime.
    • Kurahashi ranked 8th in the popularity poll, beating Kayano by 2 votes, making her the most popular female student among the cast despite not having as much panel time as most of them.
  • Epileptic Trees: Lack of any sort of on-screen villainy (even his perversion does not discomfort the target in any way, for example, he would never steal underwear) makes the theory that Korosensei is not the Omnicidal Maniac we're told he is rather popular.
  • Fandom Berserk Button: Based on the events of chapters 111-114, expressing the headcanon (which cannot accurately be called that, because canon explicitly contradicts it, putting it in Alternate Universe territory) that Nagisa is transgender or transsexual makes a significant portion of the fandom rather understandably unhappy. Many an anime-only fan has made this mistake.
  • Fan-Preferred Couple: For slash, the most popular couple is Nagisa/Karma, followed by Maehara/Isogai. For hetero pairing, we have:
  • "Funny Aneurysm" Moment:
    • One chapter has an image of a man taking a bite out of an Anpanman caricature. Takashi Yanase, the creator of Anpanman, passed away during the same week that this chapter was published in Shonen Jump.
    • Starting with Chapter 112, all those jokes about Nagisa's girlishness suddenly became a lot less funny with the reveal that his mother is very emotionally abusive towards him and wishes he was born a girl. This extends to things like forcing him not to cut his hair.
  • Genius Bonus: In Chapter 53, the English 'monster' is covered with the words of the actual text of the question it represents, and the students' attacks leave an imprint in the form of their answers. Not only are the questions and answers written in perfectly grammatical English and Japanese, they match the explanation given for the reason behind their difference in effectiveness: Seo's answer is written in the sort of formal language you would expect to see on a test, while the question and Rio's answer are in Holden Caulfield's informal, slightly dated narration style.
  • God-Mode Sue: Averted with Koro-sensei. Yes, he is an extremely powerful lifeform, with New Powers as the Plot Demands but he has a lot of weaknesses, his personality has many flaws, he was even almost killed in the third chapter, and Karma successfully injures him in the fourth. There are often situations where he is the Butt Monkey of jokes. He helps his students to kill him, but he never makes it easy for them, though they have still come close several times. Whenever there are conflicts, he helps his students, but they are the ones who finally solve them, because they are supposed to learn how to solve their problems on their own. Koro-sensei is not completely invincible either. His students end up coming to save him during the Pool arc. And even his Ultimate Defense Form is a weakness for him because he's immobile in this form, so he suffers from Deus Exit Machina during the Assassination Island arc. And even as a teacher he is not perfect, as the students are not able to triumph in the first midterm exams like he wanted.
  • Holy Shit Quotient: The Kayano revelation in Chapter 128 ended up setting the internet ablaze with people trying to find every possible hint that could have been leading up to this moment.
  • I Knew It: Let's just say that Koro-sensei having been human and him dying next March anyway was something that many people had figured out within the first few chapters.
    • The reveal that the woman in Koro-sensei's flashback was Class E's previous teacher and/or his Lost Lenore was also a twist that a good number of fans saw coming from the start.
  • Les Yay:
    • Kataoka saving Kayano in the pool. The latter even says that Kataoka was so cool she think she might have fallen for her.
    • Kayano makes a similar comment to Yada again.
    • In a relationship chart, Yada's relationship with Kataoka is described in the same manner as Irina's relationship with Karasuma.
  • Magnificent Bastard The school Chairman, who deliberately created a system that would degrade and humiliate a small group of students for the sake of ensuring that everyone else does well. When he realizes that Class E is about to prove themselves, he out-and-out cheats by making it so that the rest of the school had an overwhelming advantage against Class E. That is, his personally teaching the subject matter of the tests, which was changed at the last minute to ensure the preservation of his damn system. All with a smug smile on his face. He even states that maintaining his system is more important than saving the world. Seriously, THE GUY IS A TOOL ON STEROIDS!
    • Oh, and chapter 23 shows that the system even allows students not in Class E to get away with literally assaulting and battering a student from Class E. He also has the gall to casually drive up to the victimized student and hand him a handkerchief with a smile on his face, and let the bullies go on their merry way scott-free.
    • Then in Chapter 35 when Class E has a chance of winning a baseball game, he comes onto the field and BRAINWASHES the good baseball team to be more aggressive just to keep up his system. Good lord, this system is life or death to him.
    • His Magnificent Bastardy is even extending to their training, with him introducing Akira Takaoka into the class. And approving a nightmarish schedule of training, which just happens to not leave them any time to study. Only for the Chairman to later pull Takaoka out of the class, just to remind everyone else who was really in charge at the school. He wasn't about to let the students or Karasuma have the satisfaction of getting rid of Takaoka themselves, after all.
    • Shockingly as of chapter 128 the most Magnificent of All Bastards in the series seems to be Kaede Kayano aka Akari Yukimura. The most skilled assassin was hiding all along right under the teachers, students and readers noses just waiting for the right time to strike. Since it had been foreshadowed from the start, it leads some people to believe that the author falls into this category as well.
  • Memetic Mutation: Thanks to some memorable one-liners from the students.
    • Perversion...can save the world.
    • He's an ikemen!
    • Ansatsu Kyoushitsu is an assassination manga.note 
    • A lot of the Class-E nicknames have become favorites for readers to refer them as. Justice, Tsundere Sniper, Adult Game Protagonist, and Forever Zero are usually the most used.
    • Reactions to Chapter 128 became very common after the chapter release. There's even a Pixiv tag dedicated to it.
    • ASS CLASS
    • Civil Warnote 
  • Moe: After Koro-sensei's upgrades, Ritsu's moe level went through the roof.
    • Nagisa is incredibly adorable as well.
  • Moral Event Horizon: Terasaka comes very close to crossing it at the start of the series, where he bullies Nagisa into becoming a suicide bomber against Korosensei. The only reason he doesn't cross it is a) the explosive wouldn't kill Nagisa, b) Terasaka said he'd pay for Nagisa's medical bills with the money the act would grant and c) he grows up in later chapters. Still an incredibly Jerkass move though.
  • Narm: Nagisa's angry shouting at Koro-sensei over rejecting Sugino's feelings is pretty serious, but Nagisa's over the top face almost looks more of a Comical Angry Face.
  • Not Hyperbole: Most of the speech written by Chairman Asano, clearly meant as an gross exaggeration of Class E, turns out to be rather accurate. It references Nagisa's home issues a good 33 chapters before they were revealed.
  • The Scrappy:
    • Hiromi Shiota, Nagisa's mother, was instantly hated by the fans when she was introduced in Chapter 112. She uses Nagisa to live her life anew, denies him control over his own future so as to not make the mistakes she made, refuses to acknowledge his gender, and immediately goes into a rage when he makes any sort of defiance against her. The next few chapters with her show just how deluded she is about the whole thing. Thankfully, after the resolution of her plot arc, she becomes much more reasonable.
    • A good part of the fandom used to see Kayano as this, at least to the extent that she was just there all the time and not very interesting. Then 128 happened.
  • Ship Sinking: For a while, some people felt that Nagisa/Kayano was doomed after Chapters 128's revelation about Kayano's true nature. When Nagisa kisses her in Chapter 132, the ship quickly came back to life.
    • For some Karma/Nagisa fans, Chapter 143 can be seen like this. Given that they seemed to be very close and respect each other. The conversation Karma had with Okuda way back in regards to his inferiority of Nagisa's natural talent of assassination can be seen as Harsher in Hindsight as Karma had outright shown his jealousy of Nagisa's talent at this very same chapter.
  • Shown Their Work:
    • The BB guns and the live ammo weapons used the series are based off of real world firearms. Both the manga and the anime pay very close attention to details to both the artwork and the animation.
    • The covers of Shonen Jump seen in the anime are drawn to look exactly like those seen in recent issues. Episode 0 and Episode 11 feature Ryotsunote  and Usoppnote , respectively.
  • They Wasted a Perfectly Good Character:
    • Despite the major build up of two new students transferring into Class 3-E, Ritsu and Itona fade into obscurity moments after becoming official members of the class.
    • The God of Death, more specifically, the "Death" part. During his screentime, he fails to kill any named characters. By chapter 117, the people he killed to establish his badass cred were shown to both have survived.
    • For a character with as much screen time as Nagisa and Karma, Kayano doesn't get as much Character Development, even compared to some of the more minor students of Class E. The Reveal of Chapter 128 and onward reveal that this was intentional.
  • They Wasted a Perfectly Good Plot:
    • When Lorvo is killed by the God Of Death, it could have given Class E an unnerving perspective of the meaning of death, especially of a loved one. Turns out that he survived.
    • Nagisa's desire to become an assassin. Which is dropped without mercy about 2 chapters after it's mentioned, and replaced with the old "I'll protect everyone" cliche.
    • Some people felt that the entire plotline concerning Nagisa's mother either wrapped up too quickly or didn't have a satisfying enough conclusion.
    • Asano Jr. trying to find out Class E's secret. After his failed attempt during the second Final Exam Arc, he has apparently forgotten about it despite having at least two very good chances to do so.
  • Values Dissonance: Unlike most of the students, Yuuma Isogai was placed in Class 3-E for having a part-time job, which was regarded as serious a violation of the school regulations. Though this looks like another one of Kunugigaoka's ridiculous, unfair policies to some readers, it's actually not uncommon for schools in Japan to forbid their students from working.
  • Viewer Gender Confusion: Some fans are unsure as to whether Nagisa is actually a guy. His slim build and pigtail-like Anime Hair don't help. To make things worse, in the vomic his voice is clearly that of a female, and in the OVA he sounds even more feminine.
    • It finally gets lampshaded in chapter 43, when the class goes for a swim in their school approved swimsuits. A few girls who finally see him topless note that it was really hard to tell until that point.
    • Later chapters actually have Nagisa forced to cross dress as a girl in order to disguise himself. Though his gender was confirmed at this point, it nevertheless perpetuated the confusion even further.
  • The Woobie: All of Class E can be considered this after seeing the other students and teachers treat them like pariahs; they are basically punching bags for the rest of the school. Luckily, Koro-sensei is there to help rebuild their confidence.
  • Woolseyism: In the English dub, Irina does not teach English to the students, but instead social skills and grammar (and their use in assassinations). For example, in episode 10 instead of discussing how Japanese speakers have trouble with the English L and R, she's teaching how icebreakers are used by assassins.

Alternative Title(s):

Ansatsu Kyoushitsu