History Manga / HekikaiNoAION

** AllJustADream: according to Shizuki in a ,somehow, spooky way.

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

* {{Bishounen}}: 19-years-old Tatsuya. Minato also counts, with or without TimeSkip
* BittersweetEnding: [[spoiler:Tatsuya and Seine get the chance to have a RelationshipUpgrade, the town is saved from being sunk, Enati's threat is avoied 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.

* ChekhovsGun: Croquet eating Chibi Piyo-piyo.
* ClothingDamage: Deconstructed with [[{{Gorn}} all the wounds Seine got]]

* CovertPervert: Everybody has their thing.
** Yuzuki is a paedophile.
** Shizuki likes old men.
** Yoshiyuki gets too excited after seeing [[WholesomeCrossdresser Tatsuya]] in a {{Meido}} costume and a wig
** [[spoiler: Simon]] likes to raise little girls.
** Tatsuya gets too excited after [[spoiler: seeing a 4-year-old and a 8-year-old Seine within her dreams.]]

** Also, everybody starts to see that Tatsuya feels something for Seine
* {{Expy}}:
** Seine looks like Manga/{{Karin}} but with longer, green hair and as an EmotionlessGirl instead of a ShrinkingViolet.
** Yoshiyuki is also this for Maki of the same series.
** Minato looks like a younger, black haired version of Ren.
** Tatsuya kinda looks like a Male!Asami, Asami is from Kagesaki-sensei's Manga/SakuraNoIchiban

** AllJustADream: according to Shizuki in a ,somehow, [[http://www.mangareader.net/hekikai-no-aion/27/32 spooky way]].

* ArtEvolution: Compare [[http://www.mangareader.net/1646-52639-36/hekikai-no-aion/chapter-1.html this]] with [[http://www.mangareader.net/hekikai-no-aion/28/28 this]]

* BigBad: Ariel, the eldest of [[OurMermaidsAreDifferent seven mermaid sisters]], who periodically destroy major cities (usually by [[GiantWallOfWateryDoom tsunami]]) to collect humans' [[LifeEnergy psyche]].
** BiggerBad: [[spoiler: Demiurge]]

* BloodSplatteredWeddingDress: [[http://www.mangareader.net/1646-52642-27/hekikai-no-aion/chapter-4.html Not a wedding dress but a kimono]]; still the same impact

* GiantWallOfWateryDoom: The way the mermaids collet psyche.[[spoiler:..Also, [[http://www.mangareader.net/1646-58635-36/hekikai-no-aion/chapter-26.html Seine's image of death inside her mind]]]].

** Tatsuya also has one of Seine in [[http://www.mangareader.net/1646-52649-12/hekikai-no-aion/chapter-11.html a cute two-piece swimsuit]] after hearing they're going to the pool [[ImagineSpotting and Yuzuki seems to be watching it.]]

* MermaidProblem: PlayedForDrama...but in a ''very'' [[http://www.mangareader.net/hekikai-no-aion/31/9 hilarious]] [[http://www.mangareader.net/hekikai-no-aion/31/10 way]]

* ModestyTowel: As [[http://www.mangareader.net/1646-57244-14/hekikai-no-aion/chapter-24.html improvised bikini]].

* RunningGag / CaptainObvious: "Earthshake. There's been a lot of them these days."

* BigBad: The evil mermaids.

* PoolEpisode: It gives us a great reveal...

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

''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 TokyoPop under the name ''Aion'' before it eventually closed its North American publishing division.

* {{Gnosticism}}: Implied.

** Yuzuki is a {{Lolicon}}.

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

* {{Lolicon}}:
** Yuzuki is acknowledged as this, PlayedForLaughs and LesYay, of course.
** [[spoiler: Also, Tatsuya may be this, with a little taste of SingleTargetSexuality, upon Seine. He even [[DopeSlap punches himself]] after Chibi Seine called him "Onii-chan" to keep his [[CovertPervert "True personality"]] in line]]

* CrossOver: With {{Karin}}.

* EnforcedColdWar: [[spoiler: Tatsuya forced Seine and Sheila to live under the same roof when Sheila left the sea]]. No wonder why he ended punched in the face.

** Seine, being an EmotionlessGirl who consideres herself as a monster, is not bothered if somebody sees her shirtless or [[ThanksForTheMammary grabs her chest]] and she even takes her clothes up once to show Tatsuya that her wounds are healed. Of course, even if she doesn't freak out, Tatsuya does.
** Sheila counts too, [[spoiler: being a mermaid, she is shirtless all the time; every time she sees Tatsuya after getting her human form, she's naked]] and of course Tatsuya gives her the classic PleasePutSomeClothesOn scream.

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

** MayflyDecemberRomance: Tatsuya one-sided crush on Seine.

** Tatsuya first saw Seine after she steps on his money when a couple of bullies throw it to the ground.

** Also, the mermaids can cause earthshakes from the sea; it's geologically possible that earthshakes provoce volcanic eruptions, therefore the mermaids did cause the Vesuvio eruption.

* AttemptedRape: Since in Japan, your first kiss is SeriousBusiness, you can considered Tatsuya saw the attempted kiss of Sheila as this.

* BittersweetEnding: [[spoiler:Tatsuya and Seine get the chance to have a RelationshipUpgrade, the town is saved from being sink, Enati's threat is avoid and Sheila gets to have a genuine mermaid lower body (sacrificing her human legs and return to land); Seine gets to kill 2 of seven mermaids after hearing Simon's history through Ariel and seems to give up her revenge, but after the years, Tatsuya dies for old age and Seine is seeing besides his grave, just as young as always]].
** [[spoiler:But then Tatsuya's soul seems to came for Seine as she gives up to Aion and both are TogetherInDeath, and Aion returns to it's true owner, Sheila, returning her her voice]] making the end a little more sweet but still a TearJerker.

* 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, staring the cycle all over again

* WaterWorks: A lot of people cry in this manga but Tatsuya is more prone to it.

''Hekikai no [=AiON=]'' is a 2008 fantasy and horror manga by 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 TokyoPop under the name ''Aion'' before it eventually closed its North American publishing division.

Tatsuya Tsugawa's parents die in an accident. One week after the accident, he has inherited millions of yen and is now starting high school. He now tries to follow his father's last words about being a man of high caliber. A little while later, Tatsuya tries to rescue a girl, Seine Miyazaki, from being bullied. She coldly rebuffs his attempt and claims that she likes being bullied. He still tries to help her despite the fact she told him to leave her alone. It turns out that Seine is immortal, and she kills parasitic bugs that control humans with a snake named Aion that devours them.

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

* BloodlessCarnage: Averted. When Seine is killed, she bleeds as any normal person would do.

* GoingCommando: Seine spends half of the 5th chapter without panties because this got ruined and she only had a pair.

* 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" her mother's scence in Sheila.]]

''Hekikai no [=AiON=]'' is a 2008 fantasy and horror manga by YunaKagesaki, who is also known for ''{{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 TokyoPop under the name ''Aion'' before it eventually closed its North American publishing division.

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

** Tatsuya kinda looks like a Male!Asami, Asami is from Kagesaki-sensei's SakuraNoIchiban!

Tatsuya Tsugawa's parents die in a accident. One week after the accident, he has inherited millions of yen and is now starting high school. He now tries to follow his father's last words about being a man of high caliber. A little while later, Tatsuya tries to rescue a girl, Seine Miyazaki, from being bullied. She coldly rebuffs his attempt and claims that she likes being bullied. He still tries to help her despite the fact she told him to leave her alone. It turns out that Seine is immortal, and she kills parasitic bugs that control humans with a snake named Aion that devours them.

** TheThreeFacesOfEve: Yuzuki (naive child with a touch of wife), Seine (wise wife), Shizuki (sensual seductress).

* FinalSpeech: ''"A man of the Tsugawa Family must be a high caliber man!!"''

* TimeSkip: Volume 8 starts 4 years since the events of volume 7. Everybody grows older...[[NotAllowedToGrowUp except Seine]]

* HearingVoices: As The Mushis manifest to the host after seeing Seine.

** Also, Seine had [[http://mangafox.me/manga/hekikai_no_aion/v04/c015/17.html cramps for sitting so long in seiza]] at Tatsuya's parents's funeral event.

* FourGirlEnsemble: Yuzuki (TheDitz), Seine (DeadpanSnarker), Shizuki ([[TheTease The sexy one]] and Sheila (WildCard).

* {{ForeShadowing}}: Tatsuya [[FirstNameBasis calls Seine "Seine-chan"]], she shivers at this. The reason? One of the twins calls her the same.

!!Tropes this series provide are:

* AllLoveIsUnrequited: Yoshiyuki is in love with Tatsuya who is in love with Seine [[spoiler: who is in love with [[ParentalSubstitute Simon]] ]]
* AttemptedRape: Since in Japan, your first kiss is SeriousBusiness, you can considered Tatsuya saw the attemted kiss of Sheila as this.