GANTZ [Bunko version] (1-18 volumes)

Publisher: Shueisha
Author: Hiroya Oku
Size: 105mm x 148mm
Number of books: 18
Language: Japanese
Category: Youth manga, manga
Latest publication date: 2016-08-18

Synopsis:
Genno and Kato, a friend of elementary school, are repelled by the train to help drunk. However, the next moment, there were two rooms in an apartment. The black ball and Ganz, which was in the place where humans who had just sentenced to death gathered, unilaterally instructed to defeat the green onion alien ...!? A mysterious battle begins!