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Zaregoto is a light novel series by the [[LightNovel/{{Bakemonogatari}} exceptionally]] [[LightNovel/{{Katanagatari}} prolific]] [[Manga/MedakaBox author]], Nisio Isin. There are currently 9 novels total, with the first two being translated into English by Del Rey Manga.

The series is narrated by the college student Ii-chan ([[NoNameGiven or Ii-kun, or Ii-tan]]) as he tries his best to be an "passive observer" of the strange characters, mysteries, and inevitably, murders around him. The cast of the series is quite extensive, except most characters only appear or survive for a single novel. The only other frequent recurring characters are "The Blue Savant" Kunagisa Tomo, and "Humanity's Strongest" Aikawa Jun.

''The Kubikiri Cycle'' ("The Beheading Cycle") introduces Ii-chan and Kunagisa as they are invited to the secluded Wet Crow's Feather Island for a gathering of geniuses. The island is owned by Akagami Iria, a wealthy disinherited heiress who has been living in exile on the island with her maids for the last five years. When one of the guests is found dead - decapitated - Iria decides to ask Aikawa Jun to solve the murder. But it will take several days before Jun will arrive, and Ii-chan decides to investigate the mystery while they wait.

''The Kubishime Romanticist'' ("The Strangling Romanticist") takes place two weeks after the Kubikiri incident, at Rokumeikan Private University. While eating lunch in the university cafeteria, Ii-chan meets a girl named Aoii Mikoko, a friend he doesn't remember. She later invited him to her friend's birthday party for tomorrow, and with nothing better to do, he agrees. While buying birthday presents for tomorrow, he encounters the infamous serial killer of Kyoto Zerozaki Hitoshiki...The next day, Ii-chan and Mikoko arrives at her friend's apartment and with three other people including the host, they started the party. However, the morning after, the host is found strangled to death. There is also a spinoff known as The Ningen Series that focuses on the Zerozaki family.

This page is heavily underdeveloped and NeedsWikiMagicLove.

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!! This series provides examples of:

[floatboxright:
Series Overview
* The Kubikiri Cycle: The Blue Savant and the Nonsense Bearer
* The Kubishime Romanticist: Hitoshiki Zerozaki, Human Failure
* The Kubitsuri High School: The Nonsense Bearer's Pupil
* Psycho Logical (Part One) Gaisuke Utsurigi's Nonsense Killer
* Psycho Logical (Part Two): Sour Little Song
* Cannibal Magical: Niounomiya Siblings, Masters of Carnage
* Nekosogi Radical (Part One): The Thirteen Stairs
* Nekosogi Radical (Part Two): Overkill Red vs. The Orange Seed
* Nekosogi Radical (Part Three): The Blue Savant and the Master of Nonsense
]

* BunnyEarsLawyer - Most of the guests on Wet Crow's Feather Island.
* CatchPhrase - "It's a masterpiece" by Zerozaki, often echoed by Ii-chan
* ClosedCircle - Wet Crow's Feather Island
* {{Doppelganger}} - Zerozaki, despite looking nothing like Ii-chan, is described as this.
* GenkiGirl - Aoii Mikoko, and Kunagisa, to an extent
* GreatDetective - Rizumu claimed to be one. And of course there is Ii-chan and Aikawa Jun.
* {{Hikkikomori}} - Kunagisa
* IdiotSavant - Kunagisa has been diagnosed with Savant Syndrome, she's unparalleled with anything involving computers, but helpless in many day-to-day activities.
* InsufferableGenius - Aikawa Jun, as well as a number of the guests on Wet Crow's Feather Island, particularly [[MadArtist Ibuki Kanami]] and [[PsychicPowers Himena Maki.]]
* JackOfAllTrades - Aikawa Jun is able to do anything and everything.
* JapaneseDelinquents - Atemiya Muimi
* JekyllAndHyde and RedOniBlueOni: It may not look like it, but the two Niounomiya twins are split personalities. The weird part comes in when Rizumu (the main person, usually shown red) is a ''girl'' and Izumu (the crazy one, usually shown green) is a ''guy''. To show even more differences between the two, Rizumu is usually the light-headed personality and the detective, whereas Izumu is the killer and wears a straitjacket as a fashion statement because he thinks killing with his hands is boring.
* KnifeNut - Zerozaki
* LockedRoomMystery
* LonelyRichKid - Akagami Iria, an exiled heiress who surrounds herself with various geniuses for entertainment. And perhaps Kunagisa Tomo.
* MeaningfulTitles - By the boatload.
* MysteryMagnet - As Ii-chan comments himself, he's become far too accustomed to seeing dead bodies.
* NamesToRunAwayFromReallyFast - "Humanity's Strongest," "Overkill Red," "The Most Powerful Private Contractor in the World," a.k.a. Aikawa Jun
* NeverOneMurder
* NeverSuicide - [[spoiler: Subverted]]
* NoodleIncident - Many, as Nisio Isin is quite fond of them.
* ObliviousToLove - Ii-chan, [[spoiler: [[UnreliableNarrator not that you should believe him.]] ]]
* OneGenderSchool - Sumiyuri Academy (or the Hanging High School) is an all girls school.
* OnlyKnownByTheirNickname - The narrator, Ii-chan.
* ProfessionalKiller - Niounomiya Izumu and perhaps everyone of the Niounomiya family since they are killers for hire. Yamiguchi might count as well, but the difference is that the members of the Yamiguchi family choose their own masters and are only loyal to their masters. And there is the Sumiyuri Academy, where girls are trained to be some kind of mercenary...
* PunnyName - [[SdrawkcabName Tomoe Emoto]], [[AlliterativeName Nanami Nanananami]], [[RepetitiveName Kasuga Kasugai]]... and much more.
* PsychicPowers - Himena Maki is a world-renowned psychic. She's capable of precognition [[spoiler: up to two years after her introduction, at which point she will be brutally murdered]] and mindreading, which she uses to [[{{Jerkass}} insult the main character about his major personal problems every chance she gets]].
* SerialKiller - Zerozaki
* TragicDropout - Hitoshiki, he dropped out of middle school after his whole class was killed by [[spoiler: Izumu.]]
* TwistEnding - Nisio is very, very fond of these.
* UnreliableNarrator
* WholesomeCrossdresser - Ii-chan is forced into this in order to infiltrate the Hanging High School.
* YouGottaHaveBlueHair - Kunagisa

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