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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 (997 votes)
Bayesian Average: 7.76 / 10.0
 15% (152 votes)
 17% (168 votes)
 26% (256 votes)
 23% (228 votes)
 11% (106 votes)
 4% (41 votes)
 2% (20 votes)
 1% (9 votes)
 1% (7 votes)
 1% (10 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 #669 increased(+32)
Monthly Pos #964 increased(+77)
3 Month Pos #1396 increased(+392)
6 Month Pos #2058 increased(+493)
Year Pos #2329 increased(+325)

List Stats
On 798 reading lists
On 525 wish lists
On 2654 completed lists
On 179 unfinished lists
On 240 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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good story...crappy ending   
Rating: 7.0 / 10.0
by bluesonnet
July 12th, 2008, 12:58pm
I liked the manga. I really did. And then the mangaka drew that crappy ending. That was a HUGE disappointment for me.

I'm going to be generous with my score, since I actually liked this better than Naruto at first. And at any rate, I still like this way better than Bleach. Haha.
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Rating: 2.0 / 10.0
by wait321
June 2nd, 2008, 8:10pm
This series had one of the most confusing stories I've ever read in a manga. It's a mix of sci-fi and fantasy. They were obviously trying to explain the scientific elements, but that was a waste of everyone's time because half of the stuff that happens are fantasy. Everything was also rushed. Barely half of the angels/demons were introduced.

... Last updated on June 2nd, 2008, 8:10pm
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Rating: N/A
by danielabda
May 21st, 2008, 2:05am
At one point i liked this better than naruto..although there are cliches, its a get over it...yes the author is related to that of naruto, yes there are many similarities..personaly i think they should have made this into an anime instead...but well, what can you do. Overall the story was pretty good..the time skip was better only b/c the characters looked better..the ending IMO is the only thing that fell just seemed so sudden to end the story..
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(Was) A very promising manga   
Rating: N/A
by madcap_laughing
May 20th, 2008, 3:20am
666 Satan was the type of shounen manga that was associated with the like of Naruto/Bleach/One Piece, sadly it just fell short, in terms of plot, character development, and just looked like a major rip off, considering that he is the the twin brother of KISHIMOTO Masashi it didnt exactly bode well that they had a similar train of thought. The main character "Jio" was a practically Naruto, all that was missing was that he didnt say dattebayo every single minute. Sadly, this manga had great potential, had the writer just dared to be different and veered from that whole i will conquere my inner demon cliche. I think overall the mangaka did not execute what he wanted to do with his characters and therefore did not execute the way he wanted to tell the story. Up until the huge time leap, that came from no where, the story was pretty decent and just fell apart continuing to its demise as the ending ensued and a cr@p load of loose end were left unanswered. I give it a 7
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Rating: 6.5 / 10.0
by bjorie
April 9th, 2008, 5:04pm
At first I didn't like the art, the girls were drawn really badly (even though their boobs are huge, they looked fat at times because of the size of the thighs and such...). After the time skip, I believe the art looked nicer, but that's the only good thing about the time skip.
The story was super complicated, with everyone's background magically intertwining, and always being in the same location, at just the right time.
I found the story interesting at first, with the different o-parts (made me think of Dark Cloud, where you find weapons, or have your own and upgrade them to a certain degree), but the story always felt rushed, and some battles ended inappropriately (super hyped up character, fight ends with the dog beating it, or something).
It was okay, but with majorly powerful characters, sucky bad guys, rushed and diappointing ending, and cliche sayings about togetherness that would even embarass Captain Planet; some people might want to steer clear.
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Huge build up to a shallow end.   
Rating: 7.0 / 10.0
by bbobjs
March 11th, 2008, 11:56pm
For the majority of the story it's a fairly standard Shounen. Every character has their own set of gimmicks, secrets and hidden pasts that come up at just the right time to save their ass or advance the story and the story falls back on old standards like training and tournaments. The story starts to get more interesting and unique after the time jump but the time jump itself seems out of place. Right at the end several new characters are introduced and integrated into the main cast but before they're allow to develop the story is over. The the last 3-5 chapters probably contain about 25-50% of the whole story which makes me believe that the ending was rushed for one reason or another. There are also many similarities to Naruto but fortunately it's art style more than anything, the story and characters are far better. Overall it's a fairly standard Manga; if you choose to read it you won't be disappointed but if you don't you won't be missing out on anything major.
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It Was OK   
Rating: 8.5 / 10.0
by Kvitveis
February 23rd, 2008, 12:52pm
I enjoyed this series while I was reading it, but I got the feeling it ended too fast, it should have been longer. The art is great and the story is really unique, and I recommend it for people who like to think, and also shonen fans. ;]

What got me hooked on it was the whole o-parts thing, so I kind of missed that it wasn't more about o-parts out into the timeskip and stuff. >': But in the end I just couldn't stop reading. The humour is great and the characters likewise, but I have mixed feelings about the ending. It's definitely really different than Naruto, even though it's a bit like it in the beginning. But overall, it was an OK read. :]
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Rating: 10.0 / 10.0
by Xochie
February 3rd, 2008, 9:54pm
It was really gripping and with nice action! Even with the similarities to Naruto (twins do think alike I think) it really IS a nice, unique story.
The ending wasn't THAT bad at all! Questions unanswered? Yes, but come on! This gives so much more imagining from a solid ending! You could just wonder about how everyone ended up... it was great!
The Angels and Devils thing (Kaballah) was not that confusing... I quite liked how it had a modern feel but was regarding something very ancient.

(I think it deserves something like a... nine? But a nine point five because people are saying bad things about the awesome ending -_-)
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Mediocre until time skip   
Rating: N/A
by Hugegnome
January 13th, 2008, 9:36pm
The beginning was decent and the middle was mediocre, but the ending was just crap, it felt rushed and extremely cliche. Basically, everything after the time-skip was garbage.
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Awesome!....Until the end...   
Rating: 9.0 / 10.0
by Saexel
January 11th, 2008, 7:15pm
This series is actually really good and enjoyable if you give it the chance. I finished the whole series within a week but as many people mentioned, the ending was rather disappointing and left too many questions unanswered. Even so, it's still a worthwhile manga to checkout.
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