666 Satan

You are reading 666 Satan manga, one of the most popular manga covering in Action, Adventure, Comedy, Drama, Fantasy, Shounen, Supernatural, Tragedy genres, written by Kishimoto Seishi at MangaBuddy, a top manga site to offering for read manga online free. 666 Satan has 101 translated chapters and translations of other chapters are in progress. Lets enjoy.
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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?!