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-> ''In the game of O-To-Ko-Yo, kids will disappear.''

A 25-minute short about a game of Hide and Seek? That has to be fun for the kids, right? [[GoneHorriblyWrong Wrong]].

Children wearing [[CoolMask fox masks]] gather in an [[GhostCity abandoned city]] after dark to participate in a ritualistic game of [[DeadlyGame Hide and Seek]]. One boy has come looking for his younger sister, and a silent player in this round sure looks a lot like her. The rules are simple -- if you lose, demons will take you away. And, as the night wears on and the streets [[LightIsNotGood light up]], it becomes clear that the chilling rumours are not exaggerated...

!!Provides examples of:

* AllMythsAreTrue
* AllThereInTheManual: The official website is the only place where you'll learn ''everyone's'' names--only four are revealed in-movie.
* [[spoiler:AndThenJohnWasAZombie]]
* BackToBackBadasses: The twins [[spoiler:during their LastStand.]]
* BecomingTheMask: A [[UnderStatement slightly]] [[FateWorseThanDeath more literal case here.]]
* BigBrotherMentor: Yaimao seems like the oldest or at least the most mature of the participants, and makes sure to keep an eye out for Sorincha and protect Hikkora, who clearly looks up to him.
* BreakTheHaughty: The most obnoxious player who acts all high and mighty? Reduced to a blubbering, terrified baby who actually ''faints'' [[spoiler:in his final scene alive.]]
** [[spoiler: Also KilledOffForReal since he's the only one explicitly shown drained of his LifeEnergy]].
* CoolMask: The fox masks count, to some extent.
* CreepyChild: A few of the players, including [[spoiler:the Sorincha-imposter, and Hikkora]] at the end.
* CreepyTwins: Subverted. Despite their creepy silence and [[RedEyesTakeWarning glowing eyes]], they never do any evil at all.
* CuteMute: It's hard to say if she can really be called "cute," since her face is covered by a fox-mask, but the lone female player doesn't speak, and her mask/costume are pretty cute...[[spoiler:Neither the muteness nor the cuteness lasts.]]
* [[spoiler:DemonicPossession: What the Fifth Demon is doing.]]
* DirtyCoward: Noshiga, full stop.
* EvilIsNotWellLit: In [[GhostCity the city]], the darkness is a constant backdrop to the events that take place. Of course, [[LightIsNotGood light isn't exactly any better...]]
* EvilSoundsDeep: The reason why [[spoiler: the girl doesn't speak until the end of the game.]]
** She [[CassandraTruth speaks plenty]], its just not with [[spoiler: the VoiceOfTheLegion]] until the endgame.
* ExactWords: Yaimao told Hikkora to find Sorincha. [[FromBadToWorse Hoo Boy]].
* GhostCity: Where the game takes place.
* GlowingEyesOfDoom: [[SubvertedTrope Subverted]] with the [[CreepyTwins twins]]. Played straight with the demons.
* HuntingTheMostDangerousGame
* IronicNurseryTune: Well, it's not a nursery rhyme, but it's said in a creepy sing-song voice.
-->''"Reeeaady or noooot...''''Here I come."''
** And right before [[spoiler:poor Yaimao is skewered!]]
-->“Who will play hide and seek with me?”
* [[spoiler:KillEmAll]]: [[spoiler: Or rather, kill all but Hikkora. He just gets possessed by the main demon - arguably a FateWorseThanDeath.]]
* LastStand: The twins make one against the demon pursuing them, choosing to go down fighting when they're cornered.
** DyingMomentOfAwesome: As the only ones to make a strong effort to kill the demons.
* [[spoiler:LivingBattery: The machines use the children they captured for this.]]
* {{Mecha}}: The demons's designs are partly based on this.
* OhCrap: When Hikkora realizes that [[spoiler: Sorincha is the fifth demon]].
* OminousFog: Appears at the end.
* ParentalAbandonment: Seriously, do any of the kids' parents know where their kids are going, what they're doing? Do they even ''have'' parents?
* [[spoiler:PoweredByAForsakenChild:]] What happens to the children who play the game and lose? [[spoiler:Their bodies are taken to the center of the town and are plugged into strange machines--their LifeEnergy is used to light up the town.]]
* RedEyesTakeWarning: [[SubvertedTrope Subverted]] with the [[CreepyTwins twins]]. Played straight with the demons.
* SceneryPorn: To the point where [[http://en.wikipedia.org/wiki/Kakurenbo the other wiki's article]] postulates that the theme of the work has something to do with the urbanization of Tokyo.
* [[spoiler: SchmuckBait: The Nine-Tailed Fox tells the children exactly how to reach the arena and specifically of the demons to pique their interests.]] [[CassandraTruth The kids naturally don't listen]].
* SenselessSacrifice: Yaimao attempts to buy time for Hikkora near the end as they flee. Senseless in that Hikkora then chooses ''not'' to run.
* SiblingTeam: The twins, plus Sorincha and Hikkora kinda.
* TheSpeechless: It's left unknown whether the twins can actually speak at all.
* ThereAreNoAdults: No adults are seen or even referred to in this short--no, no one even mentions having parents. (Early concept art shows that originally, there ''were'' going to be adults in the town, but any adult who came in to find their children was turned into a featureless, mindless zombie.)
* [[spoiler: TooDumbToLive:]] All the kids but especially Noshiga for not listening when Sorincha [[spoiler: the BigBad tells them explicitly about all the dangers that they promptly disregard as fairy tales until its too late.]]
* ViciousCycle: [[spoiler:The losing children are used to light up the city. The light is used to attract ''new'' children to the town to play the game.]]
** [[spoiler: The "winner" - basically, the last one standing - is possessed by the final demon, is made "it", and is used to lure in more children, as we see with Hikkora in the end. Not to mention, and on a side note, the same thing probably happened to Sorincha earlier (off-screen) before "she" passes her brother the baton figuratively speaking, as it is highly likely that she was the previous "winner"; and that would explain why Hikkora thinks he is seeing and hearing his sister at first even though she is not the same anymore since the Fifth Demon has taken over her.]]
* VoiceOfTheLegion: What [[DemonicPossession the Fifth]] sounds like.
* {{Youkai}}: The demons' designs are based on traditional youkai, for instance the Fifth is meant to be a {{Kitsune}}.

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