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666 Satan  
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From VIZ:
In the not too distant future, mankind battles over O-Parts, relics from an ancient civilization. It takes a special kind of person to unlock the full potential of these remnants from the past, and a unique breed of humans known as O.P.T.s (or O-Parts Tacticians) become a force to be reckoned with. Unfortunately, O-Parts can be used for good or evil purposes.

Jio is a young boy with a tragic past who only trusts one thing in the world: money. Little does he suspect that he is actually a very powerful O.P.T., and inside him sleeps a demon of incredible ferocity. He meets up with a girl named Ruby, and together they decide to embark on a dangerous quest to discover as many O-Parts as they can. Will Jio help Ruby realize her dream of becoming a world famous treasure hunter? More importantly, will Ruby help Jio realize his dream of--world domination?!


Related Series

Associated Names
O-Parts Hunter

Groups Scanlating
Believe Manga Scans
Eternal Blue

Latest Release(s)
v.11 c.44 by Nihil Sine Nefas over 9 years ago
v.19 c.76 (end) by Franky House over 10 years ago
c.64 by Franky House over 10 years ago
Search for all releases of this series

Status in Country of Origin
19 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews

5 topics, 33 posts
Click here to view the forum

User Rating
Average: 7.8 / 10.0 (999 votes)
Bayesian Average: 7.76 / 10.0
 15% (152 votes)
 17% (168 votes)
 26% (256 votes)
 23% (229 votes)
 11% (106 votes)
 4% (41 votes)
 2% (20 votes)
 1% (9 votes)
 1% (7 votes)
 1% (11 votes)

Last Updated
March 18th 2015, 10:36pm PST



Category Recommendations





Original Publisher

Serialized In (magazine)
Shounen Gangan (Square Enix)

Licensed (in English)

English Publisher
Viz (19 Volumes - Complete)

Activity Stats (vs. other series)
Weekly Pos #473 increased(+246)
Monthly Pos #1317 decreased(-56)
3 Month Pos #1672 increased(+116)
6 Month Pos #1876 increased(+245)
Year Pos #2371 increased(+283)

List Stats
On 797 reading lists
On 524 wish lists
On 2660 completed lists
On 180 unfinished lists
On 242 custom lists

Note: You must be logged in to update information on this page.

Forum Posts
timeskip location over 5 years ago
An Anime? over 7 years ago
666satan's ending. over 8 years ago
a question please over 9 years ago
Confusion? over 11 years ago

Click to view the forum

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User Comments [ Order by usefulness ]

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Beginners Manga   
Rating: 7.2 / 10.0
by TRMshadow
July 31st, 2011, 10:11am
For a lot of the series it is entertaining enough to keep following, but in the long run the story is just a little to weak to really fall in love with. It's a good manga to start with, but for those of us who have matured past the Narutos and DBZs this will in a sense just be too childish.
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Rating: 6.5 / 10.0
by Silent Howl
March 7th, 2011, 12:33pm
i was interested at first because the main character looked like my oc when I was a kid...but the story is plain boring..i don't feel anything coming from this manga and the reason pushing the character are shallow..the art look like the one in naruto and part of the story as well (maybe because those two are brother) but i don't like naruto too bad..but I still prefer this one over n.
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Its cute   
Rating: 8.0 / 10.0
by badkittygrl4567
January 12th, 2011, 6:23pm
Naruto is way more boring and 50 times longer.

I enjoyed this. Its very "shounen". The main character is fun to look at. He's got a groovy design.
To me. He's a crybaby who's been bullied. He is bitter because of it, so he develops the crazy ambition to take over the world. Ruby joins him and definetly softens his outlook on life.
The are supposed to be looking for o-parts, but really they are journeying around and finding powerful bad guys that they end up fighting. And the bad guy fighting escalates to "were gonna destroy the world" bad guy levels. That doesn't bother me. What bothers me is the ending. It feels really rushed and leaves at of questions, plus its kind of sad.
I would give it a ten if it had a better ending.

... Last updated on November 29th, 2015, 10:40pm
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Kind Of Stereotypical   
Rating: 6.2 / 10.0
by robbit
March 16th, 2010, 8:06am
Let's start at the beginning. The Very first chapter of this manga was a bit of a put off because the structure of the chapter itself was stereotypical and milked to death. It does fairly well at introducing the manga but anyone who is looking for a good manga by randomly sampling is going to be put off.
The story progression is fairly linear with mid length arcs but with not much in terms of the plot. The character growth is constant throughout the story but with the concept of the powers incorporated, the power growth is fairly limited. The timeskip roughly two thirds into the story serves only to complicate matters as all problems related to it disappear within a matter of pages. The story from there on out is predictable and boring, in contrast to the first half which was at least kind of random.
The characters themselves are nothing new with the exception of Ball. Jio, Ruby, Cross, Kirin... I feel like i have seen their precursors in many other mangas. This can't be helped in most cases just in terms of the overused plot of sealed demons with the strongest within the main character as well as other not-quite-as-strong demons/angels in other less important characters.
The ending, as others have remarked, is a bit disappointing, not because there were gaping holes but the fact that you have no idea why the characters would do such a thing. The characters seem so content with their absurd reality that you have to laugh at their stupidity (the only funny moment in the story).
That said, its really not that bad a read, provided you have nothing else to read and are either ten years old or your brain is in outer space or somewhere else it shouldn't be.
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Rating: 9.0 / 10.0
by sweetnsour321
August 8th, 2009, 9:54pm
It has potential if he had taken care of it more and developed it.
its sad how people keep comparing this manga with his brothers naruto.
this has a unquie plot the drawlings become better as the story progresses. The ending was rushed you can tell he wanted to end it. It's worth a read but, when you read it you should forget about naruto and just read and enjoy if you know what I mean. it can be cliche at parts but its good it's too bad most people just don't appreciate because it's not better than naruto (so they say...) It's worth a read.. it's still stuck in my head after all these years haha.

... Last updated on January 14th, 2010, 6:46pm
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This is just like Naruto   
Rating: 6.0 / 10.0
by teniki
August 1st, 2009, 3:46am
This was an interesting manga that just evolved into a very boring and random storyline quickly. guess all those hate mail he recieved just forced him to end the manga quickly after the supposed "copied" timeskip. It's still no excuse though.The rushed ending was just pathetic. Otherwise it has many elements just like Naruto. yeah. Pretty boring to read unless you're a fangirl or childish boy that likes manga with just "interesting characters"<<<?? or cliched ones with a very random storyline with no foreshadows like naruto. AND yeah thats the end of this review.

... Last updated on August 1st, 2009, 3:52am
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Why Do Some Hate?   
Rating: 10.0 / 10.0
by kirabook
February 12th, 2009, 8:44pm
I don't know why some people gave this series such a bad rating. Yeah, there's cliches but what shounen DOSEN'T have some? Also, people are comparing it to Naruto just because the mangaka are siblings, and all the copying accusations, and saying "oh this is a naruto wannabe" blah blah blah, but really, what do you expect when they are freakin twins? I love this manga and in my opinion, it is set in a completely different theme than Naruto. It's good, but of course Naruto is better. Great read especially for Naruto fans!
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too sad for my liking   
Rating: 7.6 / 10.0
by Luv4Kawaii
December 29th, 2008, 6:53pm
somehow I found the ending bitter sweet :/.... I like the endings where you can be sure of urself. But in this case I can't think of a better ending to suit it. I can't really bring myself to dislike the story, but I can't say I like the ending.
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Rating: 8.3 / 10.0
by Soujirou
December 15th, 2008, 7:06am
lol... from all i've been hearing about the ending.... it really does suck but it wasn't as bad as i thought it would be. just be a total pessimist when you read it and it should come out better than you expected.
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ok I guess.   
Rating: 6.5 / 10.0
by gjoerulv
September 22nd, 2008, 6:34am
2 things I don't understand.Why people say crappy ending, and why they say it's better than Naruto. Well, if you're looking for a formulative action-fantasy shounen then this might be better than Naruto, but the ending (imo) worked in line with the story. But it did seem pushed.

If you've read several action-fantasy shounens before, you'll like this if you don't mind the stereotypical shounen stuff. But if that's not the case, 666 Satan isn't providing you anything particular.

... Last updated on September 22nd, 2008, 6:36am
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