Kill Ao
Kill Blue
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Alternative Titles

Japanese: キルアオ
English: Kill Blue
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Information

Type: Manga
Volumes: 13
Chapters: Unknown
Status: Finished
Published: Apr 17, 2023 to Sep 1, 2025
Genres: Action Action, Comedy Comedy
Theme: School School
Demographic: Shounen Shounen
Serialization: Shounen Jump (Weekly)
Authors: Fujimaki, Tadatoshi (Story & Art)

Statistics

Score: 6.601 (scored by 28992,899 users)
1 indicates a weighted score.
Ranked: #159902
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #2957
Members: 8,220
Favorites: 28

Available At

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@KILLBLUE_PR

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Kill Ao
6.60
Ranked #15990Popularity #2957Members 8,220
MangaShounen Jump (Weekly)Fujimaki, Tadatoshi (Story & Art)
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Volumes: /13
Chapters: /?
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Synopsis

Juuzou Oogami's a legend. Even among hit men, his name sends shivers down their spines. There's never been a job he couldn't handle—that is, until the day he awoke as a teenager! But how did his body transform? To find out, he'll have to infiltrate the one place he never thought he'd find himself in...school!

(Source: VIZ Media)

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Background

Kill Ao was simulpub digitally in English as Kill Blue through MANGA Plus. The volumes have been published by VIZ Media under the Shonen Jump imprint since June 3, 2025.
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Adaptation (TV)
Kill Ao
 
Alternative Version:

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More characters
Characters

 Oogami, Juuzou
Main
Mitsuoka, Noren
Main
Wanibuchi, Eri
Supporting
Kohazame, Shin
Supporting
Shiraishi, Ryou
Supporting
Shiraishi, Chisato
Supporting
Rindou, Kazuma
Supporting
Rindou, Eiji
Supporting
Mama
Supporting
Nekota, Kotatsu
Supporting

Reviews

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6 Recommended
3 Mixed Feelings
1 Not Recommended
All reviews (10)
Sep 8, 2025
elite_aiyaan
Recommended
A story about a middle aged legendary hitman becoming a middle schooler is, surprisingly wholesome.
The action is good, the story is decent, the characters are great (we get a lot of variety for that I assure you) but most of all it's high school premise and all the stuff other than action is just so hilarious and genuinely fun to read.
A Legendary Hitman going back to middle school apparently makes a good premise for a comedy huh.
There's nothing much else to say about it. It's good, not mind-blowing but good.
If you want a chill read with some slick action panels, this is it.


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Sep 3, 2025
Steamwood
Mixed Feelings
A solid series, but a rushed ending doesn't help me recommend. The author goes to great lengths to establish what's going on, and why it isn't creepy (which it really needs), and it works! You believe Juzo's motivations immediately and really feel his enthusiasm for learning. As it continues and more battles pop up, it turns to various challenges that are more fitting for a middle school compared to just combat, which is great to mix it up, and introduces a ton of enemies, both in school and out of it. 

The classmates are fun and interesting characters, you typically don't see Home Ec students mingling ...
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Sep 2, 2025
k3woru
Not Recommended
Spoiler
Kill Blue may as well have gotten itself killed at the end there unfortunately. With the series ending in such a disappointing way, I cannot wholeheartedly recommend this to any readers seeking a satisfying narrative.

The beginning was generic and weak, amongst other Weekly Shonen Jump series serialising at the same time (e.g. Sakamoto Days) it really needed to stand out with the hitman/slice of life/battle element themes in order to stay afloat. With Ogami (mc) navigating this sudden physical age regression, there are many fun school-setting arcs, however none are quite groundbreaking to the overarching plot.

The largest concern for weekly readers has been if ...
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More discussions
Recent Forum Discussion

Poll: Kill Ao Chapter 115 Discussion
ARK-13 - Aug 31		 17 repliesby Moppit »»
Oct 7, 12:06 PM
Poll: Kill Ao Chapter 114 Discussion
ARK-13 - Aug 24		 3 repliesby dreamingsamurai »»
Sep 10, 10:48 AM
Poll: Kill Ao Chapter 113 Discussion
ARK-13 - Aug 17		 2 repliesby dreamingsamurai »»
Sep 10, 10:44 AM
Poll: Kill Ao Chapter 112 Discussion
ARK-13 - Aug 3		 2 repliesby dreamingsamurai »»
Sep 10, 10:40 AM
Poll: Kill Ao Chapter 7 Discussion
MegamiRem - Jun 4, 2023		 12 repliesby waalex11 »»
Sep 1, 4:49 PM

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