Manga / Koro-Sensei Quest!

aka: Koro Sensei Q

Koro-Sensei Quest! (殺せんせーQ! Koro-Sensei Q!, also known as Koro-Q! or Koro Teacher Quest) is a non-canonical Spin-Off of Assassination Classroom, authored by Kizuku Watanabe and Jou Aoto, and serialized in Saikyou Jump from October 2015 to October 2019.

Basically, imagine the original Assassination Classroom plot in an RPG Mechanics 'Verse, heavily inspired by the Dragon Quest video game series.

It received an anime film adaptation (also animated by Lerche) as a companion for the Assassination Classroom: 365 Days compilation film, which premiered in Japan on November 19, 2016. Shortly after, an anime web series was announced, which is a recut of the film adaptation consisting of twelve 10-minute episodes. Crunchyroll is streaming the series, while Funimation is providing an English dub on their website. Because the anime was produced within only a year after the manga's debut, its story is drastically different; Gecko Ending beware.

Due to some things differing from the original source, any character tropes applied in Koro-Sensei Quest! should be pointed here instead of the original series' character sheets.

There will be unmarked spoilers for Assassination Classroom on this page, since the premise of Koro-Q! assumes you are familiar with the main series' story and plot. You Have Been Warned!

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This series features examples of:

• Adaptational Job Change: Aguri Yukimura was a teacher and a scientist in the original continuity, but here she's a career consultant at the Temple of Trades, and assists the hero that would later become Koro-sensei in finding his new calling.
• Adaptation Species Change:
  • Koro-sensei, instead of being a scientifically engineered artificial creature (who was originally a human), is now a demon king (who was also originally a human).
  • The generic monsters in the Koro-Q! manga are replaced by Kunudon in monster costumes for the anime.
• Adaptational Sexuality: Yada goes from having a crush on Kataoka to willingly engaging with the guys on Valentine's day, and she also seems distraught when Takebayashi resists her charms.
• Animals Hate Him: When the class ask Koro-sensei if their various quirks are caused by glitches, Karasuma asks if that was the reason why dogs bark like crazy around him. Koro-sensei replies that he isn't even in Class 3-E.
• Art Shift: Aside from the show itself being more chibi, this happens quite a bit. For instance, Nagisa's transformation due to his bug turns him into a super-buff, tall and detailed dude almost outta Jojo. Fanservicey scenes such as the skits of Irina being whipped in her underwear by her child Kunudon, a picture of a Succubus in Episode 2 and Irina's introduction as a Hot Witch have the show return to the original animation. The real Terasaka's return stands out too, being animated like the original series and designed like Berserk's Guts, and remains like that even when shown in the group shots, making him stand out when he's twice the size of the others.
• Ascended Extra:
  • Because of the more comedic tone, characters used more for comic relief in the main series like Meta Guy Fuwa and The Comically Serious Itona get more major roles here than in the main series.
  • As for Koro-Q! itself, Imposter Terasaka ends up having a bigger role in the Koro-Q! anime than in the manga, sticking around past his introduction in Episode 4 all the way to the finale.
• Attractive Bent-Gender: Crossdressing variant. When the rescue party finds Nagisa all dressed up as a girl in Episode 9, they almost unanimously agree that Nagisa looks really cute.
• Berserk Button: Koro-sensei bans the students from attacking him with a toilet plunger that has a turd stuck to the end of it.
  • Do not call Ritsu's magic, what she is currently doing.
• Big Bad: A more complicated case:
  • Played with by Koro-Sensei mostly being called Big Bad in most of the subs while he is only called the Big Bad Demon King.
  • Gakuhou Asano acts more like a typical Big Bad that Karasuma questions on who is the actual Big Bad in the sub version.
  • Played a lot straight with Shiro, who fits the role a lot more given he is the Big Bad of the original series.
• Blob Monster: Fitting for the RPG Mechanics 'Verse nature of this series, such monsters exist. However, they got unusually strong by Level Grinding off Class 3-E. We also see super fast humanoid Mach Slimes that can dodge anything, though Koro-sensei is so fast he embarrasses most of them into retiring.
• Book and Switch: Koro-sensei is caught reading a Grimoire with a porno mag hidden inside it.
• Breaking the Fourth Wall:
  • When Karma joins Class 3-E, there was a dialogue box that says "Karma joins the party!". He asks why are they putting the message in the dialogue box, while looking at it.
  • Fuwa gives more jabs in Koro-Q! than she ever did in the main series. For example, during Episode 6, when Koro-sensei calls Shiro by his real name, she calls out for "spoilers"; she then later states that the gardening segment from the same episode was for Isogai.
• Break Them by Talking: Fuwa manages to defeat Smog without fighting, by pointing out that in an RPG story, the one designated as the Starter Villain such as Smog will always go down first. Smog collapses instantly at the realization.
• Cast from Hit Points: Ritsu's magic consumes a lot of HP, so she replenishes it eating a lot.
• Chekhov's Gag: Sugino's Funny Background Event as he tries to cast some magic in Episode 3 comes back in Episode 12, when it turns out that his bug is that his magic is delayed - so all the magic he did back then happens now.
• Contractual Boss Immunity: Koro-sensei being the Demon King, the Final Boss as it were, status ailments like Irina's Charm spell don't do crap against him.
• Color Failure: The entire Big Five squad has this happen to them. They try to use a crystal to reveal/weaken the Big Bad Koro Sensei. He dodges.
• Crossover: Neuro and Yako from Majin Tantei Nougami Neuro appear in Episode 11, the latter appearing in the eyecatch and after the end credits.
• Cursed with Awesome: The keys to their success lie in the students' Good Bad Bugs.
• A Day in the Limelight: Takebayashi (who got his story cut out in the main series's anime adaptation) gets his time to shine in Episode 10 of this Spin-Off.
• Demon Lords and Archdevils: Koro-sensei is now a Demon King.
• Demoted to Extra:
  • Terasaka gets replaced by an imposter in Episode 4, and the imposter sticks around in his place long after he's caught. The real Terasaka doesn't come back until the Series Finale, now the Hero of Another Story.
  • Because her sister was Spared by the Adaptation, meaning she has no reason for her main series revenge plot, Kayano is largely just Nagisa's supportive friend, when not being obsessed with pudding.
• Denser and Wackier: Take the original story, put it in an RPG setting, remove most of the seriousness and crank the silliness and cuteness up to eleven and you get Koro-Q!.
• Diegetic Soundtrack Usage:
  • Takebayashi sang the second ending of the second season of Assassination Classroom, "Mata Kimi Ni Aeru Hi", at the end of Episode 10. What's more, the English dub actually had him sing it in English, when the dub of Assassination Classroom never had any of the themes adapted.
  • When Class 3-E finally reached Koro-sensei in his lair, they're greeted by a chorus of Koro-sensei singing "Tabidachi no Uta" (the insert song in the penultimate episode of the main series), celebrating Koro-sensei's "graduation" (i.e. him getting fired from the Academy). Like in Episode 10, the English dub also translates the song.
• "Do It Yourself" Theme Tune: The singer for the anime's opening theme, "Re:QUEST!", is Aya Suzaki, credited as Kaede Kayano (her character in the show).
• Dungeon Crawling: One of Koro-sensei's previous crimes is speeding through a dungeon and collecting all the treasure just as adventurers are going in to explore.
• Dwindling Party: In the final arc, Class 3-E gets slowly whittled down one by one by traps and enemies, as they approach Koro-sensei in his lair for the final battle. Fuwa even lampshades it when she ends up being one of the members removed.
• Evolving Credits:
  • The opening of each episode features images of that same episode woven in. The ending likewise incorporates a preview of the next episode.
  • The opening as of Episode 7, and the ending as of Episode 8 added Ritsu and Itona, and Irina changed her look.
• Fire Balls: A standard magical method of attack. Okuda's usually end up hitting her teammates.
• "Freaky Friday" Flip: Happens in Episode 8 to Class 3-E, thanks to a booby trap treasure chest. Strangely, the class' bugs carry with them when they switch bodies; i.e., Karma-in-Nagisa's body still has his bad luck, and Isogai-in-Maehara's body ends up causing the latter to suddenly lose the back half of his clothes.
• Gecko Ending: The anime adaptation diverges significantly from the manga and wraps up early with only 12 episodes, since the anime was produced within only a year after the manga's initial release.
• Good Bad Bugs: In-Universe. Everyone in 3-E has a bug, but Koro-Sensei tries to show them the advantages of their glitches, as a way to defeat him.
  • Nagisa's bug causes random effects when he summons his will to act. The first time it happens, it gives him 99999 strength. The next causes Kaede to turn into a green clone of Koro-sensei. The last one sends the entire class and Koro-sensei back to Episode 1 as a New Game Plus.
  • Karma's bug drops his luck to negative values whenever he makes a smart-ass remark. This usually materializes in him getting hit by a washtub, and if there's a trap nearby the washtub will trigger it. He uses it to defeat Grip by overloading it, sending himself and him flying away.
  • Isogai's bug makes the back of whatever armor and clothes he's wearing vanish.
  • Sugino's bug causes all the magic he casts to trigger a long time after it should. Like, several spells cast in Episode 3 happen in Episode 12.
  • Chiba and Hayami share a bug: their shots will always hit the target right between the legs. They use this to defeat Gastro and Takaoka by shooting them from the school.
  • Okuda's bug causes all of her spells to deflect.
  • Kurahashi's bug makes it so she can only summon insects when doing magic.
• Gosh Dang It to Heck!: In the English dub, the Kunudon that guards the Ruins of Tribulations says this at one point:
  Kunudon: Now where in the H-E-double hockey sticks^note "HELL" do you get off talking trash about my tribes?!
• Gratuitous English: Impostor Terasaka always speaks in perfect English.
• Groin Attack: Chiba's and Hayami's bugs make shots hit the target right between the legs. Though Chiba's is all of his long-range shots and Hayami's is that no matter where she aims.
• Hero of Another Story: Terasaka ends up getting replaced by an imposter in Episode 4, and doesn't come back until the Series Finale. When he does, he's clearly been on his own adventures, now being an expy of Guts, having mastered his Bug and gone up all the way to Level 99, and only says that his time trapped in a dungeon was "agony", much to Nagisa and Kayano's confusion.
• Hot Witch: Irina is re-tooled into one. Also doubles as a literal play on "Witch with a Capital "B"", alluding to her Embarrassing Nickname from the original series, "Bitch-sensei".
• Hypocritical Humor: When Asano enters in the classroom with his horse, he went through the window, and Itona asks if Asano ever heard of a door, even though he himself had entered the classroom through the wall, twice. Lampshaded by Maehara.
• Inept Mage: Instead of being the "inept students" from Kunugigaoka Middle School, Class 3-E is now a group of inept magical users from Kunugigaoka Magic School who are isolated due to their bugs.
• Instant Expert: Played for laughs. When encountering an elf barrier that lets in Only the Pure of Heart, Demon King Koro-sensei practices a Meditation technique in order to empty his mind so that he can bypass it, and tells the boys in the class to do the same. Nagisa doubts that they'll be able to do it, only for the boys to have already emptied their minds one panel later.
• Late-Arrival Spoiler: The anime assumes that you may have already either watched or read the original series by the time you are watching this Spin-Off.
  • When Shiro is introduced, Koro-sensei calls him "Yanagisawa", which gets lampshaded by Fuwa. The penultimate episode also plays with it, as those two are doing a Manzai duo stand-up routine.
  • In the final episode, Kaede calls Aguri her sister.
• Leaked Experience: Defied by Ritsu in her introductory episode; after she defeats a bunch of monsters, she temporarily petrifies the rest of the class so they can't get any EXP and she hogs it all for herself.
• Level Grinding:
  • Parodied. Class 3-E are so weak that slimes farm them for experience points.
  • Played straight in the anime's final episode with the real Terasaka, who is level 99 by the time he's caught up to everyone else.
• Lighter and Softer: This series is a lot cuter and less serious than the main series.
• Magitek: Instead of being a computer, Ritsu in this setting is a tablet infused with all the magic expertise in history, capable of combining it in unique ways to harm Koro-sensei. She was enchanted with sentience to keep her from being used for evil.
• Meat-O-Vision: In one chapter, Koro-sensei ends up unable to buy food, and starts hallucinating a wooden club he found as a chicken leg due to hunger. Played with in that since Koro-sensei is an Extreme Omnivore, he eats the club anyway with no issue.
• Mythology Gag:
  • The ending theme is an 8-bit version of "Seishun Satsubatsuron", the first opening theme of the original series.
  • Koro-sensei's habit of grooming and taking care of people trying to kill him carries over here, and is taken to its extremes, as Koro-sensei has been shown to reforge and improve his foe's weapons mid-fight, touch up the traps in dungeons, and even gather the orbs that have the power to defeat him and put them by the hero's bedside.
  • After Karma manages to get a hit on Koro-sensei, a scene similar to how he meets Koro-sensei for the first time, Koro-sensei punches a wall, when he gets upset, but did no damage to said wall.
  • After Karasuma's lesson with the students, the students started complimenting him, Koro-sensei gets jealous when he thinks that Karasuma is stealing his popularity with the students.
  • Takebayashi's first line in this story is also about him liking 2-D girls, followed by someone asking him if he wants that to be his first line.
  • Itona is introduced by crashing through the classroom's back wall and stating he's stronger than the wall.
  • In the original series, Koro-sensei named himself "Prince of the Fateful Eternal Wind" when he was assigning nicknames for the rest of Class 3-E. In Koro-Q!, "Prince of the Fateful Eternal Wind" is his human's pseudonym, while "Reaper" is his job class.
  • Kaede accidentally gets turned into a demon king in Koro-sensei likeness thanks to Nagisa's kiss, and as a result she starts rampaging on everyone. Kaede secretly having tentacles like Koro-sensei is one of the biggest twists in the main series, and the way her rampage is animated in Koro-Q! is very similar to the rampage the former Reaper (later Koro-sensei) did against the scientists that experimented on him and gave him his tentacles.
  • The insert song "Moonlight" (月光) from Season 2 Episode 16, which plays during Aguri's death scene in the original continuity, is played in Koro-Q! as Koro-sensei laments to Aguri about his boredom as the demon king. Appropriately enough, both Aguri's death in the source material and Koro-sensei's boredom in Koro-Q! end up inspiring Koro-sensei to take a teaching job.
  • In the final episode's confrontation, Koro-sensei sings "Tabidachi no Uta" (which is played as an insert song during his death scene in the main series).
• New Game Plus: Nagisa's bug accidentally invokes this when the main cast is in danger of being killed by a Collapsing Lair.
• No Fourth Wall: Everyone is aware of being a fictional character and comments on the nature of the series.
• The Nudifier: Isogai's glitch means that only the front half of his clothes/armour will appear on him.
• Personality Powers: Okuda is such a Shrinking Violet, her bug has her spells deflect; in one instance even a basic fire magic demonstration ends up accidentally burning Terasaka, Muramatsu and Yoshida.
• Pragmatic Adaptation: The Koro-Q! anime shortened many parts of the manga in order to fit into twelve 10-minute slots. Since the manga was also still ongoing at the time, the anime also has a Gecko Ending.
• Random Effect Spell: Nagisa's glitch gives a random effect whenever he steps forward with a strong will. Luckily the first time we see him use it, it puts his strength up to 99999 and gives him a muscular body.
• Ret-Canon: The way Nagisa is depicted with his strength maxed out is different in the anime than in the manga. In the manga, his face still has the chibi look to him, while in the anime, his entire appearance including his face becomes rougher and more realistic. This anime depiction carries over to subsequent instances of Nagisa's strength maxing out in the manga, and is even lampshaded in Chapter 11 by Fuwa.
• Rewarding Vandalism: Invoked. In one chapter, the class finds Koro-sensei breaking pots and barrels in order to find gold, since his money had just ran out.
• RPG Mechanics 'Verse: Video game rules apply. Even pixelated text boxes appear that explain what's happening.
• Running Gag:
  • Every time Hara appears, she's eating something.
  • Anytime that Karma comes up with a smart-ass remark or quips, Karma's luck drops so low that a random object keeps hitting him, namely a wash bin.
  • "It's Sorcery!!" ^note Ritsu keeps making this excuse whenever her friends assume that she's a real-life person inside instead of a sage tablet.
  • Anytime that Nagisa ends up getting dressed up in drag.
  • Fuwa keeps Breaking the Fourth Wall due to her bug in most episodes while Nagisa acts as the straight man.
  • The Impostor Terasaka stayed with the class from his initial introduction until the real came back... in the final episode.
• Shout-Out:
  • The very first time that Nagisa's random bug is shown in action, his figure resembles Kenshiro from Fist of the North Star.
  • When Koro-sensei says he want to fight someone on his level, he dresses up as Goku. In the anime, he even produces clones dressed up as Krillin.
  • Due to it being heavily influenced by the Dragon Quest series, there's a lot of references here and there that are very obvious, such as the use of monsters (which are more directly referenced in the manga, instead of using Kunudons like the anime does), and the reason of why Koro-sensei became the Demon King, as he simply switched jobs at the Temple of Trades, an expy of Alltrades Abbey.
  • While improving the traps in Karma's Cave, Koro-sensei painted the Straw Hats' Jolly Roger on the axe to make it look more dangerous.
  • During Pope Asano's game of tag, he catches Mimura while peering between two trees, making a face that looks exactly like Jack Torrance in the infamous "Here's Johnny!" scene from The Shining.
  • In Chapter 13, an image of Boruto appears on the pamphlet advertising the Temple of Trades. In the same chapter, Koro-sensei also briefly cosplays as Chun-Li.
  • Chapter 15 has everyone coming up with ramen recipes to replace the one sold by Muramatsu's family restaurant. Itona makes a "?" ramen, filled with question blocks, Super Mushrooms, Yoshi eggs, and stars all directly lifted from Super Mario Bros. Additionally, once the legendary ramen is complete, the Big Five who tries it immediately have their clothes explode in ecstasy.
  • One of the anime's recurring segments is Ace Sorceress, an obvious play on the Ace Attorney series. The segments' logo is even strikingly similar to the style of the games'.
  • Part of the ending theme's visuals is a short parody of Taiko no Tatsujin, as a nod to Bandai Namco Entertainment, who made a couple of games based on the main series for the Nintendo 3DS.
  • When the real Terasaka returns, he looks a lot like Guts.
• Skewed Priorities: When Takaoka kidnaps Nagisa in order to force Class E to give up Koro-sensei, Kaede is more concerned about how they also took the pudding Nagisa was carrying.
• Sky Face: Invoked by Takaoka in Chapter 18 of the manga, who projects an image of himself into the sky behind his Fukuma Tower hideout in order to evoke a more threatening atmosphere.
• Smashing Watermelons: Done in a chapter of the manga, although Koro-sensei claims that it's an exercise to train one's mind's eye. Koro-sensei tries to demonstrate it, but ends up getting distracted by random beach babes, while Karasuma's swing ends up Parting the Sea instead of the watermelon. In the end, the class gets fed up by Koro-sensei's horny antics and dresses him as the watermelon, before chasing him in order to kill him.
• Snowlems: In one chapter, Class E goes out skiing, and so Koro-sensei created skiing Koro-snowmen (complete with realistically proportioned legs) as targets to help them practice their assassination skills.
• Something We Forgot: When a "Freaky Friday" Flip happens in Episode 8, Karasuma and Irina end up in each other's bodies. Karasuma ties up Irina when it becomes apparent that she wants to something lewd with his body. At the end of the episode when everyone is switched back, Karasuma finds himself hanging from the ceiling after everyone has left the dungeon.
• Spared by the Adaptation: Aguri's death is one the main catalysts of the main series, but in this one, she's fine and dandy.
• Spiteful Spit: The slimes do this to Class 3-E after they beat them.
• Stealth Pun: Possibly unintentional, but Koro-sensei sings "Tabidachi no Uta" while going at mach speed in the final episode. A Chorus-sensei.
• The Stinger: At the end of Episode 1, Nagisa and Koro-sensei attempts to get rid of the effect of Nagisa's bug by visiting a sauna. It didn't work.
• Takes One to Kill One: The logic behind Class 3-E's assignment to kill Koro-sensei. Since Koro-sensei's Super-Speed is the result of a bug, the government reasons that a class full of bugged students will be able to similarly utilize their bugs and thus have a better chance than anyone at killing him.
• There Was a Door: Itona introduces himself to Class 3-E by crashing through the classroom's back wall — twice. Later, Asano Jr. enters the classroom by charging through the window on horseback, prompting Itona to scold him and ask if he's ever heard of a door.
• True Love's Kiss: Due to Kayano's pudding being laced by poison courtesy of Takaoka, she's put into a deep sleep from which only a princess's kiss can wake her. Naturally, Nagisa is chosen to deliver the kiss, and it works... but it also turns Kayano into a green clone of Koro-sensei because of Nagisa's bug.
• Valentine's Day Episode: The first half of Episode 10 is set on Valentine's Day, and has the girls in Class 3-E give chocolates to the boys. Unfortunately, Irina laced the girls' chocolates with compounds that turn whoever eats it into Technically Living Zombies that desperately crave for more chocolate.
• Victory Is Boring: In this continuity, Koro-sensei used to be a hero until he reached his max level, and so decided to become a Demon King to spice up his career. Too bad for him, he was so strong that even that position didn't give him much excitement, so he decided to train warriors to become strong enough to beat him.
• Voices Are Not Mental: When the entire class switches bodies in Episode 8, their voices remain the same, which is particularly hilarious given how jarringly different the characters sound, with the upbeat and charismatic Korosensei speaking in a monotone while Itona inhabits his body, and Karma making Nagisa sound downright sinister.
• Wizarding School: Kunugigaoka Magic School also teaches other fantasy skills like sword fighting and how to befriend monsters.

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