Gantz: O (2016)JapanesePlotAfter being brutally murdered in a subway station, a teen boy awakens to find himself resurrected by a strange computer named Gantz, and forced to fight a large force of invading aliens in Osaka. RATING 7.1 16k Votes GENREAnimation, Action, Drama STARSDaisuke Ono, Mao Ichimichi, Tomohiro Kaku