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Human System manga online by author(s): Hibiki Wataru for free Alternative Titles: ヒューマン システム ; 人造系统 ; 赤い糸 (HIBIKI Wataru) ; Akai Ito (HIBIKI Wataru) ; Red Thread (HIBIKI Wataru). If you line Chapter 1 of the Human System sign up for updates and read the new parts first!