Tags: Manga.
Gantz (ガンツ Gantsu) is a Japanese manga series written and illustrated by Hiroya Oku. Gantz tells the story of Kei Kurono and his friend Masaru Kato who die in a train accident and become part of a semi-posthumous game in which they and several other recently deceased people are forced to hunt down and kill aliens armed with a handful of futuristic items equipment and weaponry.