666 ساتان/ JIO/ O-Parts Hunter/ Satan - The Number of Beast 666/ 666～サタン～/ 666Satan/ 666サタン/ 666 사탄/ 666 Сатана/ 666～撒旦～
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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