Hekikai no AiON
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Hekikai no AiON

Alternative Titles

Japanese: 碧海のAiON
English: AiON
More titles


Type: Manga
Volumes: 11
Chapters: 44
Status: Finished
Published: Jul 9, 2008 to Jul 9, 2012
Genres: Fantasy Fantasy, Mystery Mystery, Romance Romance
Themes: Mythology Mythology, School School
Demographic: Shounen Shounen
Serialization: Dragon Age
Authors: Kagesaki, Yuna (Story & Art)


Score: 7.341 (scored by 31623,162 users)
1 indicates a weighted score.
Ranked: #43142
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #2460
Members: 7,952
Favorites: 112


Ranked #4314Popularity #2460Members 7,952
Add to My List
Volumes: /11
Chapters: /44


After both his parents died in an accident, Tsugawa Tatsuya is now left with millions of heritage he can't use. In the weeks after, he's still mourning and thinking about his father's last words, "Tsugawa family's man must be a man of great vessel". But Tatsuya is not confident he can fulfill his father's last wish.

One day, he met Miyazaki Seine, a strange girl who seems to enjoy being bullied. Tatsuya believes he can help her even though his friends only see her as a masochist pervert, and Seine herself told him to mind his own business.

Seine hunts creatures of the sea, a kind of parasitic bug that controls humans and influences them to do hateful things. She possesses an immortal body and a beast called AiON that's used to lure and devour the bugs from inside the human host. She and the bugs naturally have an impulse to kill each other on contact.

Even so, Tatsuya still can't just leave her alone, he wants to help her.


Hekikai no AiON was published in English as AiON by Tokyopop with 3 volumes released from December 28, 2010 to June 29, 2011 before the publisher went defunct. VIZ Media digitally rereleased 2 of the Tokyopop volumes under the VIZ Select imprint from June 30, 2015 to July 28, 2015.

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Aug 23, 2022
To start off, this short manga surprised me. Reading the other reviews made me feel like I was going to get a boring, well-drawn manga based on romance with mermaids and magic thrown in. In short, this is not what I received from this manga nor do I think it will be what you receive.

As a short summary and review, the read was very enjoyable and the manga itself was really good. Some of the best things this manga brought forward were the characters and their interactions plus a few really big plot twists/reveals. Aside from that, the art for the manga was incredible and ...
Jun 5, 2010
Preliminary (Unknown/44 eps)
I apologize in advance for not making a good review. I'm not sure if I'm a good reviewer, but enjoy just making reviews.

First of all, the story is about the main girl, Miyazaki (or Seine) trying to avenge his guardian from mermaids, which isn't the mermaids we usually imagine. But she also has a job of taking out "mushi"(Bugs that take over someone's thoughts by the mermaids desires), but in order to do so, she must die at least once, meaning she's immortal. But meeting a guy name Tsugawa makes it difficult for her to do her job, because he doesn't ...
May 7, 2011
Mixed Feelings
Preliminary (16/44 eps)
A creator can come up with an interesting premise, and unique characters, but it all comes down to how does one execute them, and this series comes off a bit like a sophomore production than an actual full on executed story.

STORY: Hekikai no Aion is the latest series from Yuna Kagesaki, the creator of Chibi Vampire (Karin), which has a very interesting premise: where sea creatures like mermaids and mind controlling parasites duke it out against a strange and seemingly immortal young girl.

But the story is about a high school boy named Tatsuya Tsugawa, who had lost both of his parents in a car accident ...

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Poll: Hekikai no AiON Chapter 44 Discussion
Xeo - Dec 3, 2014
11 repliesby nidoqueen106_2 »»
Nov 4, 8:43 PM
Poll: Hekikai no AiON Chapter 12 Discussion
RKC - Nov 17, 2009
3 repliesby aku27 »»
Nov 10, 2014 5:05 AM
Poll: Hekikai no AiON Chapter 3 Discussion
RKC - Nov 9, 2009
3 repliesby aku27 »»
Nov 9, 2014 1:10 AM
Poll: Hekikai no AiON Chapter 43 Discussion
Stark700 - Oct 14, 2014
3 repliesby Valaskjalf »»
Oct 28, 2014 2:47 PM
Poll: Hekikai no AiON Chapter 10 Discussion
RKC - Nov 15, 2009
4 repliesby Valaskjalf »»
Oct 18, 2014 9:26 PM