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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?!

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Chapters

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Vol.19 Chapter 76: Jio Freed [End]
August 30, 2016
Vol.19 Chapter 75: Armageddon
August 30, 2016
Vol.19 Chapter 74: Pinky Swear
August 30, 2016
Vol.19 Chapter 73: Zenom
August 30, 2016
Vol.18 Chapter 72: 2 Battles
August 30, 2016
Vol.18 Chapter 71: Devil's Summoner
August 30, 2016
Vol.18 Chapter 70: The Heart of a Woman
August 30, 2016
Vol.18 Chapter 69: Life
August 30, 2016
Vol.17 Chapter 68: Father's Thoughts
August 30, 2016
Vol.17 Chapter 67: Brothers Face Off! Memories of the Scars!
August 30, 2016
Vol.17 Chapter 66: Heart
August 30, 2016
Vol.17 Chapter 65: The Ruins' Traps!
August 30, 2016
Vol.16 Chapter 64: Zenom's Headquarters
August 30, 2016
Vol.16 Chapter 63: Full Moon
August 30, 2016
Vol.16 Chapter 62: All Members Gather
August 30, 2016
Vol.16 Chapter 61: Welcome Home
August 30, 2016
Vol.15 Chapter 60: Miko's Truth
August 30, 2016
Vol.15 Chapter 59: Magic Trick
August 30, 2016
Vol.15 Chapter 58: Everyone's Fight
August 30, 2016
Vol.15 Chapter 57: Break In!
August 30, 2016
Vol.14 Chapter 56: New Member
August 30, 2016
Vol.14 Chapter 55: Legendary O-Parts
August 30, 2016
Vol.14 Chapter 54: Ancient People
August 30, 2016
Vol.14 Chapter 53: Bonds
August 30, 2016
Vol.13 Chapter 52: The Key of Solomon
August 30, 2016
Vol.13 Chapter 51: Light and Dark
August 30, 2016
Vol.13 Chapter 50: 1 Hit
August 30, 2016
Vol.13 Chapter 49: Figure
August 30, 2016
Vol.12 Chapter 48: Kaballah's Devil
August 30, 2016
Vol.12 Chapter 47: Heart
August 30, 2016
Vol.12 Chapter 46: Evil King Icarus
August 30, 2016
Vol.12 Chapter 45: Top Floor
August 30, 2016
Vol.11 Chapter 44: The Big Bang
August 30, 2016
Vol.11 Chapter 43: Theory of the World
August 30, 2016
Vol.11 Chapter 42: Rival!?
August 30, 2016
Vol.11 Chapter 41: Hope
August 30, 2016
Vol.10 Chapter 40: The Shape of One's Heart
August 30, 2016
Vol.10 Chapter 39: The Bird Inside a Cage
August 30, 2016
Vol.10 Chapter 38: A Real Monster, Part 2
August 30, 2016
Vol.10 Chapter 37: A Real Monster, Part 1
August 30, 2016
Vol.9 Chapter 36: Maximum Volume
August 30, 2016
Vol.9 Chapter 35: The Promise
August 30, 2016
Vol.9 Chapter 34: The Main Round Begins
August 30, 2016
Vol.9 Chapter 33: Rock Bird
August 30, 2016
Vol.8 Chapter 32: The Chosen Two
August 30, 2016
Vol.8 Chapter 31: Olympia's Prelim Round
August 30, 2016
Vol.8 Chapter 30: The Kabbalah's Angel
August 30, 2016
Vol.8 Chapter 29: The Fated Two
August 30, 2016
Vol.7 Chapter 28: Black Market Caravan
August 30, 2016
Vol.7 Chapter 27: Mum and Dad
August 30, 2016
Vol.7 Chapter 26: Kabbalah
August 30, 2016
Vol.7 Chapter 25: The Legend of Spirit
August 30, 2016
Vol.6 Chapter 24.5: Gaiden: Justice
August 30, 2016
Vol.6 Chapter 24: Blue Sky
August 30, 2016
Vol.6 Chapter 23: Archenemy
August 30, 2016
Vol.5 Chapter 22: A Pact With the Devil
August 30, 2016
Vol.5 Chapter 21: Everybody's Hearts as One
August 30, 2016
Vol.5 Chapter 20: Final Operation
August 30, 2016
Vol.5 Chapter 19: Everybody's Thoughts and Feelings
August 30, 2016
Vol.5 Chapter 18: Marching Along the Winding Road
August 30, 2016
Vol.4 Chapter 17: The Power of a God
August 30, 2016
Vol.4 Chapter 16: Mexis Activated!!
August 30, 2016
Vol.4 Chapter 15: Go, Bat-man!!
August 30, 2016
Vol.4 Chapter 14: Two Against One
August 30, 2016
Vol.3 Chapter 13: Kirin?!
August 30, 2016
Vol.3 Chapter 12: The Three Ordeals
August 30, 2016
Vol.3 Chapter 11: The Power of the Ancient Civilisation
August 30, 2016
Vol.3 Chapter 10: Escape!!
August 30, 2016
Vol.3 Chapter 9: The Crimson Magician
August 30, 2016
Vol.2 Chapter 8: Resistance Movement
August 30, 2016
Vol.2 Chapter 7: The Misty City
August 30, 2016
Vol.2 Chapter 6: Fangs
August 30, 2016
Vol.2 Chapter 5: A Lone Wolf
August 30, 2016
Vol.2 Chapter 4: The Five Rings
August 30, 2016
Vol.1 Chapter 3: The Dream 2
August 30, 2016
Vol.1 Chapter 2: The Dream 1
August 30, 2016
Vol.1 Chapter 1: Friends
August 30, 2016

Other Facts

PublishedAug 11, 2001 to Dec 12, 2007
SerializationShounen Gangan
Last UpdatedJune 5, 2017
LanguagesEnglish, Japanese
Other namesO-Parts Hunter, Trigger, 666〜サタン〜