''Kyou no Go no Ni'' (or ''Kyō no Go no Ni'') is the debut Japanese {{Seinen}} {{Manga}} series created by [[Manga/MinamiKe Koharu Sakuraba]], originally serialized in Kodansha's Bessatsu Young Magazine from 2002 to 2003. The twenty-two chapters were later collected together in a single bound volume along with two extra chapters and published on November 11, 2003 by Kodansha.

The Manga would later be adapted into a five episode OVA running from March 24, 2006 - March 21, 2007. Even later, a full TV {{Anime}} adaptation would be developed (unrelated to the [=OVAs=]) consisting of [[TwelveEpisodeAnime 13 episodes]] between October 5, 2008 - December 28, 2008.

The story of the Manga and adaptations follow the lives of Ryōta Satō and Chika Koizumi, both now in their fifth grade of elementary school in class 5-2 together with their group of friends. The stories cover their many misadventures and complications as they go about surviving in the fifth grade and avoiding the problems that plague them at every turn.

Kodansha has announced that Xebec will be adapting an OVA version of the Anime in 2009, directed by Tsuyoshi Nagasawa, featuring the same cast as the Anime.

!!The series provides examples of:

* AccidentalPervert: Ryota, oh so much.
* AdaptationDyeJob: Koji and Tsubasa, both having black and blonde hair respectively in the TV series, seem to have switched hair colours for the OVA.
* AirGuitar: A variation using broomsticks, one episode revolves around the boys in class doing this during [[AfterSchoolCleaningDuty cleaning duty]]. [[SeriousBusiness Completely played out]] [[MundaneMadeAwesome like an actual concert]].
* ArtShift: In the same vein as Manga/MinamiKe.
* BelligerentSexualTension: Ryota and Chika. Lampshaded by [[EveryoneCanSeeIt everyone]].
* {{Bokukko}}: Natsumi, the resident {{tomboy}}.
* BrickJoke:
** On the very first episode, Aihara uses Ryota's finger to pull out her loose tooth and asks him to help again when her other teeth loosens. Happens again on the final episode, much to Ryota's chagrin. Doubles as BookEnds.
** Yet another one with an episode revolving around [[ItMakesSenseInContext girl's collarbones]], particularly Yuki's. Aihara later talks about it in a later episode preview.
* ChasteHero: Ryota is not really oblivious, but he's stranger to the concept of romance and is confused when anything sexual brought up.
* ChivalrousPervert: Koji
* ChristmasEpisode
* CovertPervert: Aihara, of all people
* CrossdressingVoices
* {{Determinator}}: Ryota
* EmotionlessGirl: Aihara Kazumi
* EvolvingCredits: The closing credits of the TV series change to reflect the seasonal change in the show, including the song. This means the series has 4 closing credit sequences, with a different song for each one!
* FallOfTheHouseOfCards: Koji finishes one when Aihara walks in and topples it over. [[spoiler:It turns out that all of the cards were glued together.]]
* {{Fanservice}}: The OVA is guilty of this, as is the manga on which it was based, which sometimes gets weird knowing the characters are in fifth grade. The anime series removed most of it but still has its moments.
* FestivalEpisode
* GirlishPigtails: Chika sports them at times, as does Kazumi in one episode.
* GroinAttack: Yuki accidentally delivers Ryota one when she stepped on his and Koji's superballs.
* HeavySleeper: Ryota, so much so it's actually contagious.
* HugeSchoolgirl: Megumi, somewhat - she's more developed than the other girls and often worries about her weight.
* IdiotHero: Ryota of course.
* ItWasWithYouAllAlong: Ryota [[LampshadeHanging lampshades]] this, telling Megumi she's already wearing her glasses.
** [[spoiler:In reality, she's looking for her bloomers. Turns out she was wearing it the whole time.]]
* JustFriends / SheIsNotMyGirlfriend: Interestingly, Ryota only says it exactly once about him and Chika. After that, they have a lot of moments of BelligerentSexualTension and AwLookTheyReallyDoLoveEachOther.
* {{Keet}}: Tsubasa. A mild case.
* LethalChef: No Yuki, chalk is ''not edible''.
* LockedInARoom: One episode has Ryota and Natsumi both locked in a storage room together. HilarityEnsues.
* {{Meganekko}}: Megumi, who's also BlindWithoutEm.
* MundaneMadeAwesome: Includes checking each other's heights and drawing the lottery among many things.
* NonchalantDodge: Both Aihara and Koji do this on separate occasions.
* OneOfTheBoys: Natsumi, often playing sports and wearing boys' clothes, as well as not having any qualms about [[InnocentFanserviceGirl undressing in front of the whole class]].
* PinkySwear: Between Ryota and Chika, [[spoiler:about a ChildhoodMarriagePromise they made when they were in kindergarten]]. Leads to a OneDialogueTwoConversations thing later on.
* RealSongThemeTune: The first three ending themes for the TV anime are covers by the characters of past songs; ''Secret Base ~Kimi ga Kureta Mono~'' by ZONE for the first three episodes, ''Dai Bakuhatsu No.1'' also by ZONE for the next two, ''Natsu Matsuri'' by JITTERIN'JINN for the sixth.
* RockPaperScissors: Whenever it appears, Ryota [[FailureIsTheOnlyOption always loses]]. A whole episode also revolves around it.
* SeriousBusiness: Ryota treats most everything as this, particularly when his masculinity is threatened.
* SheCleansUpNicely: Natsumi is forced on a kimono by her family for the summer festival. Even more surprising is the fact that she finally wears a skirt by the end of the series.
* SliceOfLife
* SmugSmiler: Aihara, during her mischievous occasions
* SproutingEars: Aihara again, complete with a tail
* ThirteenEpisodeAnime
* ThoseTwoGuys: Koji and Tsubasa, generally
* {{Tsundere}}: Chika is Type B.