gantz
Gantz (ガンツ) is a Japanese manga and anime series written and illustrated by Oku Hiroya.
A pair of high school students, Kurono Kei and Katou Masaru, are seemingly run over by a subway train, after saving the life of a homeless drunk who had fallen onto the tracks. Following their untimely deaths, Kei and Masaru find themselves transported—alive and well—along with a number of people who have also just died, to the interior of an unfurnished Tokyo condominium from which the Tokyo Tower may be seen—and none of them are able to leave. At one end of the room is a featureless black sphere known as "Gantz".
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一对高中生Kurono Kei和Katou Masaru似乎在挽救了落在这条路上的无家可归者醉汉的生活之后，似乎被一辆地铁火车撞倒。在他们过早的死亡之后，基伊（Kei）和马萨鲁（Masaru）发现自己被运送到了 - 现年和良好的人，也有许多刚刚死亡的人，到达了一个不可分割的东京公寓的内部，可以看到东京塔楼，他们都无法从那里看到，而且他们都无法离开。房间的一端是一个毫无特色的黑色球体“ Gantz”。