Read manga: 666 Satan

manga
Summary:

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?!

Chapters (76)
Aug 25, 2019
Chapter 1 : Friends
Aug 25, 2019
Chapter 2 : Dream 1
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Chapter 3 : Dreams 2
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Chapter 4 : 5-Part O-Parts
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Chapter 5 : Lone Wolf
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Chapter 6 : Fang
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Chapter 7 : The City Of Fog
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Chapter 8 : The Resistance
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Chapter 9 : The Crimson Magician
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Chapter 10 : Escape
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Chapter 11 : Power Of The Ancient People
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Chapter 12 : The Three Tests
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Chapter 13 : Chilin Appears!?
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Chapter 14 : 2 Versus 1
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Chapter 15 : Black Batman
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Chapter 16 : Mekisis Starting!
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Chapter 17 : The Power Of God
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Chapter 18 : The Road Full Of Hardships
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Chapter 19 : Everyone's Thoughts
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Chapter 20 : The Final Battle
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Chapter 21 : The Hearts Become One
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Chapter 22 : Contract With The Devil
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Chapter 23 : The Old Enemy
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Chapter 24 : The Blue Sky
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Chapter 25 : The Legend Of The Spirit
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Chapter 26 : Kabbalah
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Chapter 27 : Dad,mom
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Chapter 28 : Orush
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Chapter 29 : The Two Who Are Bound To Fate
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Chapter 30 : The Kabbalah's Angelic Recipe
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Chapter 31 : The Olympiad Preliminaries Begins
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Chapter 32 : The Chosen Two
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Chapter 33 : Mysteriousbird - Roc Bird
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Chapter 34 : Olympia Final Stage Starts!
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Chapter 35 : Promise
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Chapter 36 : Definitely's Volume
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Chapter 37 : The Real Monster
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Chapter 38 : The Real Monster (2)
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Chapter 39 : The Bird In A Cage
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Chapter 40 : Heart And Shape
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Chapter 41
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Chapter 42
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Chapter 43 : Theory Of The World
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Chapter 44 : The Big Bang
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Chapter 45
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Chapter 46 : Evil King Icaros
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Chapter 47 : Heart
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Chapter 48 : Kaballah's Devil
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Chapter 49
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Chapter 50 : 1 Hit
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Chapter 51 : Light And Dark
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Chapter 52 : The Key Of Solomon
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Chapter 53 : Bonds
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Chapter 54 : Ancient People
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Chapter 55
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Chapter 56 : New Member
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Chapter 57 : Break In!
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Chapter 58
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Chapter 59 : Magic Trick
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Chapter 60 : Miko's Truth
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Chapter 61
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Chapter 62 : Full Moon
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Chapter 63
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Chapter 64 : Zenom's Headquarters
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Chapter 65 : The Ruin's Traps
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Chapter 66 : Heart
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Chapter 67 : Brothers Face Off! Memories Of Scars!
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Chapter 68 : Father's Thoughts
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Chapter 69 : Life
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Chapter 70 : The Heart Of A Woman
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Chapter 71 : Devil's Summon
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Chapter 72 : Two Battles
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Chapter 73 : Zenom
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Chapter 74 : Pinky Swear
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Chapter 75 : Armageddon
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Chapter 76 : Final Chapter "jio Freed"