History Manga / KillerKiller

* PeekABangs: Hijirihara's lazily-kept hairstyle turns into this.

* KnifeNut: Hijirihara's skill with his knife and willingness to utterly destroy his victims with it implies this much.

* WhamEpisode: Chapter 3, when the manga reveals itself to be a ''Franchise/{{Danganronpa}}'' SpinOff.
** Chapter 8: [[spoiler: Asano learns that Hijirihara is Killer Killer, the perpetrator of the Giboura Massacre is revealed to be Mukuro Ikusaba and the Eight Branch is attacked by someone who seems to be the deceased Ikusaba.]]
** Chapter 9. Oh boy, chapter 9. [[spoiler: There isn't just one Mukuro attacking the eight branch, ''there's an entire army of them!'' Oh, and Asano is stabbed by Fujigawa, [[ApologeticAttacker who is crying his eyes out while doing it.]]]]
** Chapter 11: [[spoiler: Fujigawa reveals himself as the Killer Killer in a livestream, and claims he has set bombs all over the country, set to go off in 24 hours. The only way to stop them is to kill Asano, who has the disarming device in a necklace she's forced to wear. She can't remove it herself, or else it will detonate without disarming the bombs.]]
* WhamLine: Chapter 8 ends with Dougami calling Hijirihara and saying "[[spoiler:Mukuro Ikusaba broke out!]]"
* WhamShot:
** Two in Chapter 3:
*** When Hijirihara kills Saiyama, the background shifts to depict Monokuma, confirming this is indeed a part of the franchise.
*** Subverted with the ending. Asano sees what ''seems'' to be Makoto Naegi's corpse, only for the following chapter to out it as firework.
** In chapter 4, [[spoiler: Chikatilo walking into the stadium midway through the fight between his doppelganger and Hijirihara. This is followed by outing the imposter as Juuzou Sakakura.]]
** Chapter 8 has the [[SarcasmMode lovely]] image of [[spoiler: Mukuro Ikusaba cutting her way through a middle school.]]
** Chapter 9 has a pretty big one. [[spoiler: Fujigawa stabs Asano through the stomach.]]
** Chapter 10 features one with the appearances of [[spoiler: Sonosuke Izayoi and Ruruka Andou.]]
** Chapter 12 has an appearance from [[spoiler: Kazuo Tengan, who plants a tracking device/detonator on Asano.]]
* YouAreAlreadyDead: Itou thinks he's fine before his flesh explodes off into several square strips of skin.

* RedHerring: All the doctors being organ fetishists in a hospital where the victim's organs were harvested was set to throw readers from the real culprit's purpose with the organs.

* ShoutOut: Hijirihara makes Asano recite several stock phrases from ''Manga/KindaichiCaseFiles'' to unnerve the first culprit. Turns out his grandfather was a fan.

* {{Foreshadowing}}: It's mentioned in the first chapter that cults have become more common after "that incident". That incident happens to be [[VisualNovel/DanganronpaTriggerHappyHavoc the Tragedy]].
** The title's font bears a resemblance to ''Danganronpa'''s signature title.
** In Chapter 3, Saiyama is killed in a similar manner to Mukuro Ikusaba. [[spoiler:Chapter 8 reveals that she was indirectly responsible for making Hijirihara [[InLoveWithYourCarnage obsessed with serial killings.]] Chapter 10 reveals that this also happened to Fujigawa, [[KnightTemplar for completely]] [[HumansAreBastards different reasons.]]]]
** In Chapter 8, a flashback shows Fujigawa accidentally stepping on Hijirihara's face. The flashback in Chapter 10 shows [[spoiler: a panicked Fujigawa stomping the class representative's face after the Giboura Massacre.]]

** Tomizawa thinks Hijirihara missed his sword swing at her. A few seconds later, her head (and the entire roof of the hot springs resort) comes right off.

Written by Yuichirou Koizumi and drawn by Sasako Mitomo, ''Danganronpa Gaiden: Killer Killer'' is a SpinOff work within the ''Franchise/{{Danganronpa}}'' universe, specifically tying into ''Anime/Danganronpa3''. When it was initially launched in March 2016, the manga was advertised and presented as a separate work, but was eventually revealed in the third chapter as being in the same universe and subsequently rebranded.

* BittersweetEnding: [[spoiler: Hijirihara has been outed as the Killer Killer, and is now a wanted fugitive. He recovers from his wounds, reunites with Asano, and they run away together to start a new life. However, [[Anime/Danganronpa3 Yukizome is still brainwashed with despair, and Tengan has big plans for Mitarai...]]]]

* CallForward: Several characters from ''Anime/Danganronpa3'' appear, including Munakata and Tengan. [[spoiler: One chapter shows how desperate Tengan's vision of hope is, and the final chapter has Tengan visiting Mitarai, and Yukizome watching Munakata with her swirly despair eyes.]]

* LateArrivalSpoiler: If someone were to read ''Killer Killer'' before watching ''Anime/Danganronpa3'' (which was finished months before the last few chapters were published), then they'd probably figure out too soon that [[spoiler: Tengan and Yukizome are not to be trusted.]]

* GoOutWithASmile: [[spoiler: Fujigawa smiles at Hijirihara just before he commits suicide via bomb.]]

* FirstEpisodeSpoiler: The incident in middle school left Hijirihara more than a little...unhinged.

* AntiHero: Hijirihara.
* ArtisticLicenseBiology: Hijirihara somehow [[spoiler: '''cuts off and then reattaches''' Asano's head to remove the explosive collar Fujigawa places around her neck. Somehow, she survives this. This is not possible for a number of reasons, but mostly because the nerve cells in the spinal column would be severed, and the brain would be unable to function even if the head was reattatched.]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/killer_killer.jpg]]

Set after [[VisualNovel/DanganRonpa the Worst, Most Despair Inducing Incident in the History of Mankind]], the story focuses on Misaki Asano, a young woman who is assigned to the Future Foundation's 6th branch, dedicated to murder investigations. On her first day, Asano is partnered with Takumi Hijirihara, a sardonic, lazy investigator who seems worth nothing. In reality however, Hijirihara hides another side, he was caught in a massacre incident in middle school that left him scarred with a disturbed obsession with murder, which he takes out on other killers. Despite his eccentricities, the two become friends, and find themselves on the path of the Future Foundation's darkness...

* AfterTheEnd: Comes with being set after ''VisualNovel/{{Danganronpa}}''. It seems to have recovered pretty well, seeing as the idol industry, hospitals and the manga industry are all back up and running.

* {{Foreshadowing}}: It's mentioned in the first chapter that cults have become more common after "that incident". That incident happens to be [[VisualNovel/DanganRonpa the Tragedy]].

* {{Retcon}}: While it had been suggested before, the manga completely retcons out the more apocalyptic portrayal of the Tragedy given ''VisualNovel/{{Danganronpa}}''. While the world was indeed in a very bad state, nothing implies that the forces of SHSL Despair had the grip the first game said they did and in less than a year things have rebuilt a fair bit. Although, given our only source for the state of the world in the first game was none other than Junko Enoshima, [[UnreliableNarrator who was almost certainly trying to play the Tragedy up to make her remaining captives despair]], this state of rebuild is actually plausible.

Written by Yuichirou Koizumi and drawn by Sasako Mitomo, ''Dangan Ronpa Gaiden: Killer Killer'' is a SpinOff work within the ''Franchise/DanganRonpa'' universe, specifically tying into ''Anime/DanganRonpa3''. When it was initially launched in March 2016, the manga was advertised and presented as a separate work, but was eventually revealed in the third chapter as being in the same universe and subsequently rebranded.

* AfterTheEnd: Comes with being set after ''VisualNovel/DanganRonpa''. It seems to have recovered pretty well, seeing as the idol industry, hospitals and the manga industry are all back up and running.

** In Chapter 3, Saiyama is killed in a similar manner to Mukuro Ikusaba. [[spoiler: Chapter 8 reveals that she was indirectly responsible for making Hijirihara [[InLoveWithYourCarnage obsessed with serial killings.]] Chapter 10 reveals that this also happened to Fujigawa, [[KnightTemplar for completely]] [[HumansAreBastards different reasons.]]]]

* {{Retcon}}: While it had been suggested before, the manga completely retcons out the more apocalyptic portrayal of the Tragedy given ''VisualNovel/DanganRonpa''. While the world was indeed in a very bad state, nothing implies that the forces of SHSL Despair had the grip the first game said they did and in less than a year things have rebuilt a fair bit. Although, given our only source for the state of the world in the first game was none other than Junko Enoshima, [[UnreliableNarrator who was almost certainly trying to play the Tragedy up to make her remaining captives despair]], this state of rebuild is actually plausible.

* WhamEpisode: Chapter 3, when the manga reveals itself to be a ''Franchise/DanganRonpa'' SpinOff.

* {{Irony}}: For all of [[spoiler: Hijirihara's]] obsessions with killing with passion: The very person who inspired him is not passionate in murder in the slightest and ironically shares a number of similarities with the serial killers he dismisses. [[spoiler: First, Mukuro only committed the massacure in his middle school to prove herself to Junko, reflecting Itou's means of using murder as a means to an end. Mukuro is often described for having no feeling for the world and doesn't seem to care about who she kills, something he also points out. Mukuro also killed solely for her sister's sake without any true personal investment in her killings, which Hijirihara condemns with her fakes. Finally: other materials like ''IF'' and ''Zero'' show that Mukuro has had a few reservations about her part in Junko's plans, showing a complete and utter lack of conviction that he himself praises so much.]]

* ImprobableAimingSkills: Hijirihara pulls this off in the final chapter by [[spoiler: tossing a dagger at Asano's neck, decapitating her long enough to disable the bomb collar. '''And she survives this.'']]