GANTZ:O

Kei Kurono (Yuki Kaji) is killed in a subway station, then wakes up in a room with strangers and a black sphere called Gantz. Nobody there can say why they were brought back, only that the sphere sends them out to hunt aliens loose in Osaka. Directors Yasushi Kawamura and Keiichi Sato put Kurono and the others on a clock, where each mission could be the last one any of them survive.