[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/qvcatj6_1607.jpg]]
[[caption-width-right:300:Yumei and Kei...ummmm [[KissingCousins embracing]] ]]
->''"Someone important to me has disappeared.".''

''Akai Ito'' (''アカイイト''), known in English as ''Red Strings'' (Referencing the legendary strings of fate) is a {{visual novel}} created in 2004 by Creator/{{Success}}, it is essentially a supernatural adventure with some GirlsLove thrown in.

The story is about a girl named Hatou Kei who, as a result of a dead mother, heads to her father's house in order to claim her inheritance. However, she soon finds herself caught up in supernatural happenings after a dream concerning a huge tree and a mysterious girl...

It has an in-direct sequel of sorts called ''VisualNovel/AoiShiro''. While not following the same story, or having the same characters, it takes place in the same universe and many elements from Akai Ito, both story and 'gameplay', return. Sakuya gets a cameo in the UpdatedRerelease PC version of the game.

You can now buy it on PSN for the PlayStation 3. Has slightly improved resolution, and Duel Shock 3 support.
----
!!This game contains examples of:
* AmbiguouslyGay
* ActionGirlfriend: Kei rarely, if ever, fight the enemies herself.
* TheAlliance: The cooperation between the Mizuki and the exorcists sent to defeat Nushi, long time ago. By now, it's completely fallen apart [[spoiler: amongst other things because [[FantasticRacism the exorcists have wiped out the Mizuki]] and the lineage of Nie no Chi dwindled, with Kei being the last generation]].
* AllMythsAreTrue: Indeed.
* AllThereInTheManual: The AkaiIto JIVE Guidebook.
* AllYourBaseAreBelongToUs: [[spoiler: During Uzuki route, Uzuki has been knocked out by KEI-kun. Kei and co retreat to her BigFancyHouse, and do their best to supernaturally barricade the house with paper charms from Uzuki. Unfortunately, this time it's not just Nozomi and Mikage who is out to get Kei...]]
* AncientTradition: Sakuya is a one-woman ancient tradition who watch over the Nie no Chi. [[spoiler: Were the Mizuki tribe still exist, it would have been their duty.]]
* AndIMustScream: Nozomi[[spoiler: is trapped inside the Ryugetsu for centuries after Nushi-sama is sealed. This is probably also her fate in the endings where the Ryugetsu isn't destroyed]].
* [[AndYourLittleDogToo And Your Little Fox Too]]
* ArcWords: "Taisetsuna hito // inakunatta". Rough translation: "Someone important to me // have disappeared."
* TheAtoner: KEI-kun.
* BackFromTheDead: KEI-kun[[spoiler:, and it's Uzuki's job to make him dead again.]]
* BackupFromOtherworld: [[BigDamnHeroes Yumei]], all the time, no matter what route you're on (save for Nozomi's). This doesn't apply on Yumei's own route, where she becomes physical again (and for all purpose, ''alive'') due to drinking your blood.
* BarrierMaiden: Yumei[[spoiler: or whoever is being the current Ohashira-sama.]]
* BattleAura
* BattleCouple: [[spoiler: Kei and Sakuya, in the Onikiri no Oni ending.]]
* BattleHarem: A YuriGenre example: Kei has four women (OK, 2 women, 2 girls) who are seriously interested in her, ready to fight to death to protect her. It's very noticeable because Kei herself is ''not'' an Action Girl.
* {{Beastess}}: Sakuya is big, has CuteFangs, and has an animalistic aura about her. [[spoiler: When she drink Kei's blood or use Ragou, she is a shade removed from being a werewolf. And then in the Onikiri no Oni ending, she become an actual oni.]]
* BeautifulDreamer: Inverted. It's Kei who is seen sleeping by [[spoiler: Uzuki and Yumei, in their respective route. For the former, it's the result of the ButThouMust, below. Because of this, fandom often depicts Uzuki as a creepy stalker.
* BigBad: Nushi-sama[[spoiler: who is inside KEI-kun.]]
* BigBrotherInstinct: KEI-kun, who does all he can protecting his twin Kei. Well, it's not like he is older than her.
* BigDamnHeroes: Yumei-san, all the time. [[spoiler: It's really her obligation to do so.]]
* BigFancyHouse
* BloodSplatteredInnocents [[spoiler: Some examples: Kei gets a fist through the chest. Her hand is covered in blood. She falls off a cliff.]]
* BloodyHilarious: Kei just keep on feeding Yumei during the later's route. ''Affectionately''. While being watched and commented by Sakuya and Tsudura. [[CrowningMomentOfFunny The game even make a small sub-screen during the CG to display them commenting!]]
* BrokenBird: Uzuki. The stress of being a morally-upright onikiri really gets to her nerve. [[spoiler: Of course, having a dead big brother is a huge factor.]] She literally never smile except in her route.
* ButThouMust: After Uduki [[PostVictoryCollapse over-exerts herself]] chasing away Nozomi and Mikage, Kei bring her to her room. ThereIsOnlyOneBed. "Option 1: Sleep next to her." "Option 2: Sleep next to her." "Option 3: Sleep next to her." [[LampshadeHanging Lampshaded]].
* ButterflyOfDeathAndRebirth: Ohashira-sama's standard attack. Probably also qualify as MoreDakka.
** Is she [[VideoGame/{{Touhou}} Yuyuko?]]
* BoobsOfSteel: Sakuya and Uzuki kicks ass physically more than Tsudura or Yumei.
* CatSmile: Nozomi, of all people. Mikage doesn't have one, though.
* CherryBlossoms: Averted. The tree where Ohashira-sama dwells is not a Sakura, despite obviously being cast in similar light [[spoiler: down to the myth that Sakura bloom beautifully because corpses are buried under it]]. [[http://en.wikipedia.org/wiki/Styphnolobium_japonicum It's an Enju, or Japanese Pagoda Tree]].
* TheChick: Kei.
* CoolBigSis: Yumei[[spoiler:, somewhat literally even. She is/was the daughter of Kei's father's little sister.]]
* CoolSword
* CrazyPrepared: [[spoiler: Tsudura fall into a well while running away in a random direction during an angst-laden fit? Don't worry! Earlier, Kei onee-san have tied a rope to climb out of the well!]]
* CreepyTwins: Nozomi and Mikage[[spoiler: subverted, Mikage is really Nushi's Wake-Mitama that took the form conforming to Nozomi's crumbling psyche while the former is [[AndIMustScream trapped in Ryugetsu]].]]
* CuteGhostGirl: Yumei-san, Nozomi-chan, Mikage-chan. The first is basically Kei's guardian angel, the other two... [[LesbianVampire want to eat Kei]].
* CuteLittleFangs: Tsudura, Sakuya. Nozomi and Mikage aren't exactly cute.
* DarkAndTroubledPast: For each character. Some more disturbing than the others.
* DateCrepe: Kei and Uzuki.
* DeathByOriginStory: Senba Akira, whose death is a ''very'' major element in Uzuki's [[spoiler: and KEI-kun's]] background.
* DeclarationOfProtection: Uzuki to Kei. This is even the central premise of their relationship, with Uzuki doing her absolute bestest to protect Kei and Kei believing in her against all odds. See JustInTime below.
* DemonicPossession: Poor KEI-kun. [[spoiler: Later on during Uzuki route, Nushi-sama begin to possess Kei, which can lead to a very bad end.]]
* DevourTheDragon: [[spoiler: During Tsudura route, Obana is killed by Nozomi. Tsudura fall into HeroicBSOD... and then eat Obana's corpse, fusing the kitsune into herself. And then she become a super-powered werefox mage.]]
* DistantFinale: The "Onikiri no Oni" ending, where [[spoiler: many, many years have passed before we see Oni!Kei and Oni Sakuya fighting yet another Nushi cultists.]]
* DoesThisRemindYouOfAnything: Although ''Akai Ito'' is not an eroge, all the blood-drinking scenes are EXTREMELY obviously stand-ins for sex. There's even have a special soft, romantic-porno style BGM track reserved for those scenes only. [[spoiler: Even Kei feels that Yumei drinking her blood is something sinful, since Kei sees Yumei as a motherly figure.]]
* DrivenToSuicide: [[spoiler:One of the endings has Uzuki being forced to kill Kei; she ends up killing herself so the two could be 'bound in death by the same blade.']]
* TheDragon: Nozomi and Mikage, for Nushi-sama.
* EmergencyTransformation
* EmotionalMaturityIsPhysicalMaturity: Played straight and subverted. [[spoiler: Sakuya looks thirty, and acts like she's in thirty. But in her route, it's revealed that she hasn't exactly grown up from being the little girl who was really attached to the first Ohashira, centuries ago.]]
* EmotionlessGirl: Mikage. [[spoiler: She is not really an individual.]]
* EvenTheGirlsWantHer: Kei seems to be rather popular with the ladies, don't you think? [[spoiler:The fact that she has the ''Nie no Chi'' may be one of the reasons...]]
* EvilGloating
* ExplainingYourPowerToTheEnemy: Some characters (especially Nozomi) are more prone to this than the others.
* '''FakeMemories''': To the point that Kei's past seems to be disturbingly similar to [[VideoGame/FinalFantasyVII Cloud Strife]]'s.
* {{Familiar}}: Obana, Tsudura's white fox. [[spoiler: Like everything else supernatural, it can be powered by Kei's blood.]]
* FightingDownMemoryLane: It takes great courage for Kei to [[spoiler: see beyond the trauma, about what actually happened 10 years ago]]. Also an EpiphanyTherapy for her.
--> '''[[spoiler: Fake]] Mom and Dad''': Fufufu... That's right... Kei is a bad girl.
* FingerSuckHealing: Subverted. [[DoesThisRemindYouOfAnything Kei deliberately hurt her finger with a sewing needle so that Yumei has a moral reason to suck her blood]]; otherwise Yumei will be too shy to do so. [[ItMakesSenseInContext Cuter than it sounds]].
* FinishingEachOthersSentences: Nozomi and Mikage.
* FlashbackNightmare: Kei. [[spoiler: However, some of it belong to Hakuka, and some are outright fakes; either created by her own mind or planted there by Nushi.]]
* FreakOut: During Sakuya route, Kei's mind can't bear the sudden revelation of so many supernaturals right in front of her. She snaps, and then [[spoiler:either she dies falling off a cliff or she gets better, depending on earlier choices]]. To be fair, before that happen you are given the option to simply escape Hemizuka and return to mundane life.
* FriendlessBackground: Tsudura's only friend, she says herself, is Obana.
* FrozenFashionSense: [[PlayingWithATrope Subverted, Inverted, Justified, and even Played Straight]]. Let's see... Nozomi and Mikage has been trapped inside Ryugetsu for a long time that the change in people's way of dressing doesn't affect them. Yumei, on the other hand, only began wearing traditional kimono when she became Ohashira; in the flashback when she was still alive she wore normal clothes. On the other hand, Sakuya dresses liberally, despite being 1000+ years old (just look at her huge tract of land!). But then Nozomi, Mikage, and Yumei are ''ghosts'', so it's not like they have a set of wardrobe.
* FuroScene: An [[{{Pun}} ample opportunity]] for Sakuya to show off her assets.
* FurAgainstFang: Of the Individual Battles variety: Tsudura[[spoiler: fused with Obana's soul]] versus Nozomi and Mikage.
* GenkiGirl: Tsudura
* GhostShipping: Choose one: Yumei or Nozomi. [[spoiler: However, in the Happy Ending of her route, Yumei becomes human again.]]
* GirlsLove
* GoOutWithASmile: [[spoiler: Kei, after she got impaled by Nushi near the end of Sakuya route. Unless Sakuya give her an EmergencyTransformation.]] Also Nozomi [[HeroicSacrifice at the end of her route]], but she got better.
* HalfIdenticalTwins [[spoiler: Kei and KEI (aka. Hakuka, Kei's twin brother)]]
* [[spoiler: HeroicSacrifice: Obana.]]
* HeroicWillpower
* HeterosexualLifePartner: The Happy Ending for each character, except for Tsudura. Well, more like, "not immediately" in Tsudura's case. And not exactly "life" partner for Nozomi. [[{{Squee}} In Sakuya route, the house plate was even changed to "(residence of) Asama Sakuya and Hatou Kei"!]]
* HiddenEyes
* HugeSchoolgirl: Uzuki, at about 170 cm tall.
* HumanAliens: If the myths are to be believed, the Mizuki Tribe originated in the moon and are either related or are the basis for the folklore of Kaguya-hime.
* TheHunter: Uzuki. Being a hunter is pretty much the job of the onikiri.
* HypnoticEyes: Seems to be the standard ability of Nushi and his right hands.
* ImpaledWithExtremePrejudice: [[spoiler: Near the end of Sakuya route, either Kei or Sakuya [[{{Gorn}} is gutted through the stomach by Nushi]].]]
* IKnowYoureInThereSomewhereFight: Averted. KEI-kun [[HeroicWillpower does his best to contain Nushi-sama]], but when the evil snake god is out, KEI-kun is gone. [[spoiler: Except in Yumei route... and then he commits SenselessSacrifice.]]
* IncorruptiblePurePureness: Yumei-san. She never take Kei's blood without the latter's consent, she never snaps, she never gets angry at Kei[[spoiler: even though her [[OurGhostsAreDifferent current state]] is, at least marginally, Kei's fault]], she stands vigilant as an Ohashira-sama for about ten lonely years, she saves Kei all the time, etc etc and so on. She stands in stark contrast to another vampirism-capable ghost, Nozomi.
** In fact, Yumei's [[{{Leitmotif}} theme song]] was later made into an ImageSong (with vocal!), which nicely sums Kei's story in Akai Ito. It's a shame that the song isn't featured in the game. Definitely a Missed [[CrowningMusicOfAwesome Music]] [[CrowningMomentOfHeartwarming of Heartwarming]].
* IntergenerationalFriendship: Kei and Sakuya. Kei calls Sakuya, "Sakuya-san". [[spoiler: When Kei's memories return, she remember that in the past, she call her Sakuya obaa-san.]]
* InTheBlood: The lineage of the Nie no Chi. From Emiko to Kei's father to Kei[[spoiler: and Hakuka, aka KEI-kun]].
* IntrepidReporter: Sakuya, whose job is a reporter/writer/photographer. Her field of specialty is folklores, occasionally branching to the occults. [[spoiler: That she herself is a [[ReallySevenHundredYearsOld supernatural]] is a huge advantage.]]
* InvisibleToNormals
* JapaneseMythology
* JustInTime: Nozomi and Mikage comes storming with Nushi, the paper charms from Uzuki doesn't work, neither Sakuya nor Yumei is fit for fighting, and Uzuki herself is still unconscious from her previous battle with KEI-kun. Kei is forced to take up a sword and desperately pointing it at Nozomi, who laughs sinisterly. [[spoiler: And then Uzuki wakes up and begin kicking ass. Phew!]]
* KarmaHoudini: Nozomi[[spoiler: in her route. Elsewhere, she gets what is coming at her.]]
* KnightTemplar: The onikiri (exorcists) are very prone to this. The tenet of the Senba is basically "if it's an oni, it should die. No exception". Just how far Uzuki is willing to carry this creed vary between routes. [[spoiler: The Wakasugi have wiped out all of the Mizuki Tribe save for Sakuya, even though they were protecting the Seal of Nushi.]]
* LaserGuidedAmnesia: Tsudura, to Kei. See SaveTheDayTurnAway below.
* [[LastOfHisKind Last of Her Kind]]: [[spoiler: Sakuya. And it's the fault of the Wakasugi onikiri.]] And you wonder why she doesn't get along with Uzuki.
* LaughingMad: Part and parcel with the FreakOut, above.
* LeitMotif: "Itsuka no Hikari" for [[BigGood Yumei]], and "Utakata" for [[BigBad Nushi]], both of which were later made into full-fledged ImageSong.
* LesbianVampire: While none of the characters are vampires and more like oni, their drinking Kei's blood definitely invokes this image. [[LampshadeHanging Lampshaded]], too, with Kei comparing [[spoiler: Sakuya to ''Dracula'', when the Sakuya need blood for her power, to save both of them out of a cliffhanger situation.]]
* LethalChef: Kei ''cannot'' cook at all and her food is described as a biohazard.
* LifeMeter: Kei's blood. There is no way to recover it in-game, since the game only take 4 days. [[spoiler: Guess what Kei must do to save Yumei.]]
* LittleBitBeastly: [[spoiler: Tsudura in her werefox form.]]
* LonersAreFreaks: Seems to be a recurring theme amongst the "romanceable" characters [[spoiler: especially Nozomi, who has been in an AndIMustScream situation for centuries]].
* MadnessMantra: [[spoiler: Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong! Wrong!"]]. [[spoiler: Kei have just had a painful memory resurfaced]].
* MagiBabble: So... so much. There is even an in-game EncyclopediaExposita.
* MagicMirror
* ManipulativeBastard: Nozomi, so very much. [[spoiler: While trapped in Ryugetsu, she whispers encouragement to the Wakasugi to massacre the Mizuki, on the basis that Mizuki, too, are oni. [[KnightTemplar And the Wakasugi, in their paranoia, listened]].]]
* {{Masquerade}}: There are oni, insidious beings who corrupt and prey upon humans. And then there are the humans who hunt them. It's "better" for everyone if the humans don't know of this [[SecretWar conflict]]. The Wakasugi is especially good at keeping this. [[spoiler: Near the end of Tsudura route, Kei [[LampshadeHanging wonders]] whether she will be KilledToUpholdTheMasquerade, after all that adventure with Tsudura. Tsudura's answer? LaserGuidedAmnesia.]]
* MayflyDecemberRomance: [[spoiler: Sakuya with Emiko, who was Kei's grandmother. And in her Happy Ending, with Kei. Averted in her Onikiri no Oni ending, in which Kei herself [[EmergencyTransformation become something that is not human]].]]
* {{Miko}}: Uduki, even though she normally doesn't wear Miko attire. Kei seems to have a... wanting to see her in one.
* MishmashMuseum: Averted.
* MissingTime: The result of LaserGuidedAmnesia, above. [[LampshadeHanging Lampshaded]].
* MsExposition: Tsudura, Sakuya, and Uzuki each gets their turn. Sometimes all of them at the same time.
* MyGodWhatHaveIDone: Tsudura [[spoiler: disappear into the forest after she realize how much she have hurt Kei while in werefox-mode]], while Uzuki [[spoiler: is DrivenToSuicide after accidentally killing Kei]].
* MysteriousWaif: Yumei
* NiceGirl: Kei. She even refer to the vampire twins as Nozomi-''chan'' and Mikage-''chan'', even though they were trying to exsanguinate her just five minutes ago.
* TheNoseKnows: Tsudura gain super(-natural) scent ability[[spoiler: in werefox form, after fusing with Obana.]]
** ScarilyCompetentTracker: And she can track Nozomi and Mikage by [[spoiler: the smell of Kei's blood that they drank]], even though those twins are ''vampire-ghosts hiding in a mirror''.
* NotSoDifferent: What Nozomi whispers into Uzuki's mind, [[spoiler: after she accidentally slash Kei to near death.]]
* [[spoiler: OedipusComplex]]: Want to know who amongst the romanceable characters Kei is most attached to? [[spoiler: [[TrailersAlwaysSpoil You guess it, it's Yumei-san]]. She says that Yumei is like a mother and a big sister to her. Doesn't stop her from wanting to live with Yumei, in a way that's more like a couple. ''Yumei doesn't object to that, not at all''.]]
** The whole story can be said to revolve around this trope. There is that bit about Kei's memory of [[spoiler: staining her hands with her father's blood]]. The memory is true, [[spoiler: although it's ''not hers''. ]] And the plot starts with death of Kei's mother. The other character whose Happy Ending shows her living together with Kei? [[spoiler: Sakuya, who has been watching the lineage of those with Nie no Chi and who have consoled Kei during the death of her grandmother and mother.]]
** It's worth mentioning that the maiden name of Kei's late mother was ''Senba'' Mayumi.
* {{Onmyodo}}
* TheOrder: The Onikiribe ("demon-slaying groups"), of which the Senba and the Wakasugi are two amongst many.
* {{Orochi}}: Nushi.
* OurGhostsAreDifferent
* OurSoulsAreDifferent: The Wake-Mitama, houses a part of Nushi's divine soul. In most route, the Wake-Mitama is inside the Ryugetsu, [[SealedEvilInACan which is sealed since long time ago]]. Nushi can manipulate those who gets too close to his Wake-Mitama into freeing his true soul. Works both way too: those who wield the Wake-Mitama can harm Nushi more easily... [[DidYouJustPunchOutCthulhu if they are of sufficient power]].
* OurVampiresAreDifferent: Let's look at the SlidingScaleOfVampireFriendliness...
** Blood Requirement: N/A ! Nozomi, Mikage, and Yumei doesn't need human blood to survive, at all. They are more like spirits sustained with magic (and blood, especially blood of a Nie), than traditional vampires. Nozomi and Mikage only seek human blood to awaken Nushi.
** Conversion: They can't convert the biting way. One becomes fettered spirit through powerful and rare magic. Bizarrely enough, only Sakuya can convert... although the converted one won't become a Mizuki.
** Morality Shift: It really depends whether someone was already a messed-up person before conversion. However, Oni!Kei does seem to become less human after she ceases to be human.
** Super Power: Oh yes, becoming an oni gives you super power.
** Weaknesses: Nozomi and Mikage can only appear during the night, while Yumei can appear anytime.
* OurWerewolvesAreDifferent
* PinkySwear: Uzuki and Kei. It's also in the opening movie.
* PostVictoryCollapse
* PowerLevels: In the JIVE Guidebook. Sakuya (in Ragou mode) is listed as higher than Nushi and thus highest in the ranking, while Kei is (obviously) the lowest. [[spoiler: Oni!Kei and Horned!Sakuya aren't listed.]]
* ThePowerOfBlood: The story revolves around the blood of the Nie no Chi. In this era, that means Kei.
** BloodMagic
* ReallySevenHundredYearsOld: Sakuya is 17-[[spoiler:''centuries'']] old.
** Subverted for [[spoiler: Yumei, who have only been an Ohashira for about 10 years, and when she became a spirit was only 16 years old.]].
* RieKugimiya: Tsudura. [[PigeonholedVoiceActor Guess what]]. [[spoiler: Tsudura even say that she hates people since she's [[Manga/HayateTheCombatButler constantly targeted by bad people]], some of which aren't humans.]]
* RedEyesTakeWarning: Nozomi and Mikage. [[spoiler: Tsudura's werefox mode.]]
* RedStringOfFate: The literal translation of the title. When someone take Kei's blood ([[DoesThisRemindYouOfAnything with her consent]]), there is a short FMV showing two blood-red sinusoidal wave synchronizing with each others into a straight line, showing adjoining of destiny. [[spoiler: This even become a running gag in Yumei route!]]
* RestoredMyFaithInHumanity: Kei, for Tsudura. [[spoiler: It doesn't stick, Tsudura returns to her [[{{Masquerade}} world of the onikiri]]. Unless you get her Happy Ending, in which Kei remember everything when Tsudura pass near her.]]
** PatrickStewartSpeech: [[CrowningMomentOfHeartwarming "Surely, while there are many bad people in the world, not everyone are bad, right? If humans are scary, then is Kei-nee-san scary?"]]
* SaveTheDayTurnAway: Even though Tsudura [[spoiler: have become a very powerful onikiri, have eliminated the threat of Nushi-sama (''before it can even start''), have saved Kei from very certain death, have helped Ohashira-sama AscendToAHigherPlaneOfExistence, and most importantly: have found a person she need not be paranoid of, she can't be together with Kei because doing so will endanger Kei]]. [[TearJerker She does regret it]].
* SaveTheVillain: There is a Nozomi route. [[spoiler:However, it's rather short. It's at least partially canon, because Nozomi is hanging around Kei in the ''AoiShiro Kaeishou'' manga.
* SecretWar: The conflict between the [[TheHunter Onikiribe]] and the [[WhatMeasureIsANonHuman Oni]] has been on-going since the beginning of time. [[spoiler: Kei is only hidden from the preying supernaturals due to the blue marble charm that is her cellphone straps. And even that isn't fool-proof.]]
* SoundtrackDissonance: You would think that the final battle against Nushi will have OminousLatinChanting or something, but no. Well, it actually has its meaning
* [[HeWhoMustNotBeSeen She Who Must Not Be Seen]]: Youko-chan, Kei's friend at the school. Also, Kei's ''father'' in the flashback; which is [[{{Egregious}} egregious]] because every other significant male characters (except Senba Akira) was seen.
* StepfordSmiler: [[spoiler: Tsudura.]] Kei even says in her route something along the lines of [[spoiler: Tsudura]] being good at hiding sadness by smiling.
* SuperMode: [[spoiler: Sakuya, who morph into a near-human form whenever she drink Kei's blood. There's a level 2 of it, that's when she use Ragou. And then there is a level 3 of it, seen only in the Onikiri no Oni ending... maybe because she drink Kei's blood all the time.]]
** [[DragonBallZ Super Mizuki-jin 1/2/3]]?
* SupernaturalAngst
* SupernaturallyDeliciousAndNutritious: Kei's blood is ''very'' tasty and powerful. It's also an AmplifierArtifact[[spoiler:, and in the Onikiri no Oni ending, seems to be an UpgradeArtifact that allow Sakuya to be in her true Oni form]].
* SupernaturalGoldEyes: [[spoiler: Kei, after she ceases to be human in the Onikiri no Oni ending of Sakuya route.]]
* SurvivorGuilt: [[spoiler: Sakuya, who was a DeathSeeker after her tribe was annihilated. She got better after she met Emiko, Kei's grandmother.]]
* TalkToTheFist: When Nushi have taken over KEI-kun's body and is now in his full form, a muscular man with snake tattoo:
--> '''Nushi''': [[EvilGloating So, what are you going to do?]]
--> '''Sakuya''': [[VerbThis THIS]]! *delivers a [[SuperMode Ragou]]-empowered beatdown*
* TeethClenchedTeamwork: Sakuya doesn't like Uzuki [[spoiler: or any onikiri, for that matter]]. Tsudura hates to be reminded of the duty of an onikiri. Uzuki [[KnightTemplar hates oni with a passion]] [[spoiler: and Sakuya is an oni]]. But they do have to sweep personal issues under the carpet, because 1) [[TheFettered it's the right thing to do]], 2) if Nushi get his hands on Kei, things will go downhill fast, and 3) [[LesYay they do want Kei]]. ''And it worked''.
* ThemeTuneCameo: Kei use the opening theme as her cellphone ringtone. [[LampshadeHanging It sounds somewhat sinister]], and in the OST CD, is titled "[[TarotMotifs Wheel of Fortune]]". [[spoiler: And it's also the LeitMotif for Nushi, titled "Utakata". Yeeeeeeah!]]
* TheseHandsHaveKilled: [[spoiler: One of Kei's resurfaced memory, about her hands being covered in the blood of her father. Turns out that while the memory is real, it's not her, it's Hakuka's. At that time Nushi was controlling him.]]
* TimeDissonance: To [[spoiler: Sakuya]], the UsefulNotes/WorldWar2 was something that happened ''just recently''. Granted, she is possibly 1000 years old...
* TogetherInDeath: [[spoiler: In Sakuya route, where she and Kei become the next Ohashira so they can be together forever. Yumei, now alive again, feel pity for them and is doing her best to allow them to live again.]]
* TookALevelInBadass: [[spoiler: Kei, ''of all people''. In Onikiri no Oni ending of Sakuya route, Sakuya [[EmergencyTransformation give her Mizuki Tribe blood to the dying Kei]], making her something that is not human. Then they become a couple who fight those who try to awaken Nushi-sama again, possibly ''forever''. Fans seems to prefer this ending so much over Sakuya's Happy Ending, that there is an unlockable MiniGame about Kei's life (unlife?) as onikiri in AoiShiro.]]
* TotalEclipseOfThePlot: Nushi cause lunar eclipse to happen [[spoiler: to prevent Sakuya from using her Ragou magic. ''However, it doesn't work'' because Sakuya was born during a new moon. Badassery ensued. Ouch.]]
* TraumaInducedAmnesia: Even Yumei-san beg to Kei to not remember things from her past. For good reason.
* UndeathAlwaysEnds: Different end for different character.
** Yumei: [[HumanityEnsues Becoming alive again, physical body and all]] when someone take her position as Ohashira. [[spoiler:I.E., by KEI-kun at the Happy Ending at Yumei's own route, or by Sakuya and Kei at one ending of Sakuya route]]. It's also possible to retire from being an Ohashira if there is a (very powerful) magic that can act as a seal, [[spoiler: i.e. at the end of Tsudura route. In that case, Yumei AscendToAHigherPlaneOfExistence.]]
** KEI-kun: Dead, when Nushi completely took over his body.
** Nozomi: Averted. At the end of her route, she doesn't get to be alive again. It's not known whether she's sent to FinalDeath when the Ryugetsu is destroyed in another routes.
* UnstoppableRage + BerserkerTears: Sakuya, [[spoiler: when Kei was gruesomely impaled by Nushi.]]
* VampireInvitation: Played with. It's exactly because Kei refuse to forget Yumei that the vampire-away charm is breached. Which means that Nozomi and Mikage become able to find Kei.
* VampireWerewolfLoveTriangle: Averted. There are vampire ghosts and were-people who are [[LesYay competing to get Kei]], but the vampires are obviously villains who don't care about Kei's well-being.
* WhatMeasureIsANonHuman: The oni is a decidedly broad category. Dead people walking around? Oni! Ghosts appearing? Oni! Evil god who demand blood sacrifice? Oni! [[spoiler: Your non-human ally? Oni! Those who murder people in cold blood, thus have no human heart? Oni!]]. Seriously, those [[TheHunter onikiriyaku]] need to chill a bit.
* [[WhenThePlanetsAlign When The Stars Align]]: The requirement for Sakuya to use her Ragou magic. [[spoiler: Unfortunately, one of Nushi's power is control over celestial objects...]]
* WhoWantsToLiveForever: [[spoiler: Sakuya's lament when Kei dies is... touching. To be fair, she has lost absolutely everyone she knows in her very long life.]]
* YouAreNotAlone
----