History Manga / HekikaiNoAION

* BabiesEverAfter: At the end, Croquet had three puppies.[[spoiler:..and one inherited Chibi Piyo Piyo's powers [[MixAndMatchCritter and wings!]]]]

* FirstKiss / SacredFirstKiss: Seine and Minagi got their first kisses taken [[spoiler: by Yuzuki]]

* FourGirlEnsemble: Yuzuki (TheDitz), Seine (DeadpanSnarker), Shizuki ([[TheTease the sexy one]]) and Sheila (WildCard).
** And Before Sheila appeared, Nagisa as the WildCard.
* FreudianTrio: Shizuki (manipulative Superego), Yuzuki (kind Ego) and Seine (vengeful Id).

* FuroScene: Seine had one in chapter 3. Yoshiyuki had it in chapter 7
* GenderFlip: [[http://img580.imageshack.us/img580/4753/158mf.jpg This]] [[http://img840.imageshack.us/img840/9796/159mt.jpg volume 10's]] [[http://img542.imageshack.us/img542/1755/160m.jpg omake]].

* {{Gorn}}: Courtesy of BrainwashedAndCrazy people upon Seine. Let's make a list:
** Chapter 2: Thrown off a building
** Chapter 4: Poisoned and stabbed with a glass bottle
** Chapter 8: Choked to death
** Chapter 17: BatterUp to death
** Chapter 19 and 20: ImpaledWithExtremePrejudice
** Chapter 21: Stabbed with a knife in the lung
** Chapter 22: Disarmed

* LuminescentBlush: Tatsuya is prone to this. Also Yoshiyuki, Sheila, heck, even [[TheStoic Seine]]
* MayDecemberRomance: Tatsuya's parents had an age gap of 30 years and still they were HappilyMarried

* MermaidProblem: PlayedForDrama...but in a ''very'' hilarious way
* MindControlDevice: The Mushis.
* ModestyTowel: As improvised bikini.

* NoPeriodsPeriod: One day, Yoshiyuki was all mad, and Minato jokes that it must be "that day of the month".
* NotWhatItLooksLike: It has moments.

* OurMermaidsAreDifferent: The evil mermaids.
* PetTheDog: Seine comfort Tatsuya in the first chapter, telling him he can become a high caliber man

* TheReveal: Why Tatsuya saw Sheila as his mother at one point? [[spoiler: Because Sheila took her psyche when she died]].
* ReturningTheHandkerchief: Tatsuya used this as an excuse to talk to Seine in the first chapter
* ReusedCharacterDesign:
** Seine looks like Manga/{{Karin}} but with longer, green hair and as an EmotionlessGirl instead of a ShrinkingViolet.
** Yoshiyuki is a purple haired version of Maki of the same series.
** Minato looks like a younger, black haired version of Ren.
** Also, everybody starts to see that Tatsuya feels something for Seine.
** Tatsuya kinda looks like a Male version of Asami from Kagesaki's ''Manga/SakuraNoIchiban''

* ShipTease: Seine and Tatsuya.
* ShownTheirWork: There was really an earthquake at Port Royal that sank 2/3 of the city into the sea.

* WhatIsThisThingYouCallLove: Seems to be the mermaids's case; specifically the emotional part of "love" since they do know "love" is used by humans to mate.

* LoveTriangle: Sheila -> Tatsuya -> Seine, [[TriangRelations making it type 5]]

* InnocentCohabitation: Tatsuya and Seine, who now moved in with Tatsuya.

** Sheila[[spoiler:, one of the [[OurMermaidsAreDifferent evil mermaids]],]] fell for Tatsuya because he was the only aside Ariel to show her kindness. [[spoiler:Also, because she was afraid to lose him, she stopped thinking about avenging herself against Seine, the one who let her without voice and "killed" her.]]
** Our protagonist Seine as well. She decided to go with Shimon, a man she knew absolutely nothing about, just because he was nicer to her than her abusive foster father.

** Played straight with Yoshiyuki as UnluckyChildhoodFriend Betty and Seine as the cold ActionGirl Veronica.

* BittersweetEnding: [[spoiler:Tatsuya and Seine get the chance to have a RelationshipUpgrade, the town is saved from being sunk, Enati's threat is avoided and Sheila gets to have a genuine mermaid lower body but has to sacrifice her human legs; Seine gets to kill 2 of seven mermaids, after hearing Simon's history through Ariel, and seems to give up her revenge. After many years, Tatsuya dies of old age and Seine is seen besides his grave, just as young as always]].[[spoiler:But then, Tatsuya's soul seems to come for Seine, and she gives up Aion. Both are TogetherInDeath and Aion returns to its true owner, Sheila, returning her voice.]] This makes the end a little more sweet but still a TearJerker.

* BrainwashedAndCrazy: All the victims of the mushis become lose all rational thought when they take a look at Seine's face.

* CardboardBoxHome: Seine lives in a cardboard box since she's ReallySevenHundredYearsOld and has no family. Even after Tatsuya took her home, she still insists to sleep inside her beloved cardboard box.

* CruelToBeKind: Seine must force the Mushi's host into hate her and kill her so she can rip out the Mushi.
--> '''Seine:''' "It's fine like this. She should hate me more. If she does, I can save her quickly."
* CycleOfRevenge: Seine, looking for avenge Simon, kills a mermaid in an OffWithHerHead way; later that same mermaid comes [[BackFromTheDead back from the dead]] looking for revenge, starting the cycle all over again.

* FirstNameBasis: When Tatsuya at first started calling Seine by her last name. After they started living together, She tells him to call her by her first name since she thinks Miyazaki is "made up". Also, Seine just calls him Tatsuya.

* {{Foreshadowing}}: Tatsuya [[FirstNameBasis calls Seine "Seine-chan"]], she shivers at this. The reason? One of the twins calls her the same.
* FourGirlEnsemble: Yuzuki (TheDitz), Seine (DeadpanSnarker), Shizuki ([[TheTease The sexy one]]) and Sheila (WildCard).

* {{Gorn}}: Cortesy of BrainwashedAndCrazy people upon Seine. Let's make a list:

* GratuitousForeignLanguage: The mermaids (and Shizuki, sometimes) use greek words.

** Seine, being an EmotionlessGirl who considers herself as a monster, is not bothered if somebody sees her shirtless or [[ThanksForTheMammary grabs her chest.]] Shehe even takes her clothes off once to show Tatsuya that her wounds are healed. Of course, even if she doesn't freak out, Tatsuya does.

** Tsukasa, every time someone says they are living with Tatsuya because he picks them up, has a imagine spot of them as cute, pitiful homeless [[AlwaysFemale girls]] under the snow.

* MayDecemberRomance: Tatsuya's parents had an age loop of 30 years and still they were HappilyMarried
** MayflyDecemberRomance: Tatsuya's one-sided crush on Seine.

* MoreThanMindControl: Mushi infected [[spoiler: Nagisa]]. Also Himenuma; though Mushi infected, he seems to have a crush on Sheila.
* NoPeriodsPeriod: One day, Yoshiyuki was all mad, Minato jokes that it must be "that day of the month".

* OminousFog: Enati, the third mermaid can use fog to [[spoiler: make an illusion of Simon]].

* PetTheDog: Seine comfort Tatsuya in the first chapter saying him he can become a high caliber man

* RedHerring: The deal with Tatsuya's mother. [[spoiler:Her name was Umi (which means "sea") and Sheila was very much a carbon copy of her image, so many readers thought Umi was a mermaid too. In reality Umi was just a normal human but her psyque was took by Sheila after her death so Tatsuya sometimes could "feel" his mother's scence in Sheila.]]

* ReturningTheHandkerchief: Tatsuya used this as an excuse to talk to Seine at the first chapter

* RuleOfThree: Seine can die just three time per day. If she dies more than that, Aion has to "recharge" itself [[spoiler: and Seine will feel the pain of all those deaths]] before she can use Aion again.

* ShownTheirWork: There was really a earthquake at Port Royal that sank 2/3 of the city into the sea.

* ThereIsOnlyOneBed: Shizuki and Yuzuki slept in the same bed Tsukasa was sleeping after getting hit on his head because how "High status" women like them would sleep on the floor?

** At the first chapter, Minato warns Tatsuya about not messing around with Seine because he thinks she is a masochist who likes being bullied.
*** Hilariously "enforced" by Seine to keep Tatsuya off her neck.

* WaterfallPuke: [[LethalChef Tatsuya's food]] had this reaction on all people, except Seine. Meanwhile, it causes Shizuki to puke BloodFromTheMouth.
* WhamEpisode: Volume 10. ''The whole Volume 10''. [[spoiler:Tatsuya shouts aloud he likes Seine, Sheila infects Tatsuya via stealing his first kiss and send him to kill Seine at her sisters's demand, Tatsuya doesn't kill Seine and instead pulls himself out the friend zone he has been for 4 years by kissing her, Sheila is returned to the sea by Ariel, Shizuki and Yuzuki came back, the fated day is closer...[[ArsonMurderAndJaywalking and Seine is dressed as a]] {{Meido}}]]

** Chapter 21: Stabbed [[KnifeNut with a knife]] in the lung

* PantyShot: Seine had this in the first chapter.

* WaterfallPuke: [[LethalChef Tatsuya's food]] had this reaction on all people, except Seine. Shizuki is an UpToEleven case, it causes to her puke BloodFromTheMouth.

%%* {{Bishounen}}: 19-years-old Tatsuya. Minato also counts, with or without TimeSkip

* YouGottaHaveBlueHair:
** Seine, who has green hair.
** Yoshiyuki, who has purple hair.

* AccidentalPervert: Minagi accidentally walks into a naked Seine in the bathroom and freaks out because she was unaware that Tatsuya brought a stranger in the house.

* AllLoveIsUnrequited: Nagisa is in love with Tatsuya who is in love with Seine who is in love with [[ParentalSubstitute Simon]]
* AttemptedRape: Since in Japan, your first kiss is SeriousBusiness, you can consider Tatsuya saw the attempted kiss from Sheila as this.

** Then played with; ShrinkingViolet but exotic mermaid and human but BrokenBird witch. Though Tatsuya shows more attraction to Seine, he still can leave Sheila alone when she's in trouble...

* TheBigDamnKiss:
** [[spoiler: Tatsuya to Seine in chapter 39]]. Also counts as ForcefulKiss.
** Also, [[spoiler: Seine to Tatsuya]] at the end of chapter 39, beginning of chapter 40; {{Subverted}} because it was just to [[spoiler: take a Mushi out of him]].
** And before of all that, [[spoiler: Sheila to Tatsuya]] at the end of chapter 38.
* BigFancyHouse: Tatsuya's house.

* BittersweetEnding: [[spoiler:Tatsuya and Seine get the chance to have a RelationshipUpgrade, the town is saved from being sunk, Enati's threat is avoided and Sheila gets to have a genuine mermaid lower body but has to sacrifice her human legs; Seine gets to kill 2 of seven mermaids, after hearing Simon's history through Ariel, and seems to give up her revenge. After many years, Tatsuya dies of old age and Seine is seen besides his grave, just as young as always]].[[spoiler:But then Tatsuya's soul seems to come for Seine, and she gives up Aion. Both are TogetherInDeath, and Aion returns to its true owner, Sheila, returning her voice.]] This makes the end a little more sweet but still a TearJerker.
* BloodSplatteredWeddingDress: Not a wedding dress but a kimono; still the same impact

* ComedicLolicon: Yuzuki is acknowledged as this, PlayedForLaughs and LesYay, of course.

* EveryoneCanSeeIt:
** Well...everyone but [[ObliviousToLove Tatsuya]] can see that Yoshiyuki is in love with him. He's just that dense
* FaceFault: Minato had this in chapter 9.

* GirlInABox: Seine, before moving to Tatsuya's house used to live in a cardboard box!

* CardboardBoxHome: Seine lives in a cardboard since she's ReallySevenHundredYearsOld and has no family. Even after Tatsuya took her home, she still insists to sleep inside her beloved cardboard.

''Hekikai no [=AiON=]'' is a 2008 fantasy and horror manga by Creator/YunaKagesaki, who is also known for ''Manga/SakuraNoIchiban'' and ''Manga/{{Karin}}''. The series is serialised by ''Dragon Age''. The manga finished with 11 volumes in October 14th, 2012. Three volumes of the series was translated in English by {{Creator/Tokyopop}} under the name ''Aion'' before it eventually closed its North American publishing division.

* RidiculouslyCuteCritter: [[http://mangafox.me/manga/hekikai_no_aion/v06/c024/31.html Chibi Piyo-Piyo]]

* TrueLovesKiss: Referenced [[http://mangafox.me/manga/hekikai_no_aion/v06/c024/30.html here]]. Tatsuya's face is [[SugarWiki/FunnyMoments priceless]].

* FamousLastWords: Tatsuya's father's last words were ''"A man of the Tsugawa Family must be a high caliber man!!"''

* PowerTrio: Seine, Shizuki and Yuzuki.
** FreudianTrio: Shizuki (manipulative Superego), Yuzuki (kind Ego) and Seine (vengeful Id).
*** Alternatively, Seine (Superego), Tatsuya (Ego) and Sheila (Id).
** TheHecateSisters: Yuzuki (ditzy maiden), Shizuki (eccentric mother), Seine (bitter crone).

* ZettaiRyouiki: Seine wears rank B.

* BrainwashedAndCrazy: All the victims of the mushis become this when they take a look at Seine's face.

''Hekikai no [=AiON=]'' is a 2008 fantasy and horror manga by Creator/YunaKagesaki, who is also known for ''Manga/SakuraNoIchiban'' and ''Manga/{{Karin}}''. The series is serialised by ''Dragon Age''. The manga finished with 11 volumes in October 14th, 2012. Three volumes of the series was translated in english by {{Creator/Tokyopop}} under the name ''Aion'' before it eventually closed its North American publishing division.