Gantz manga volume 5 contains volumes 13-15 in an omnibus format and features story and art by Hiroya Oku.

The Gantz fighters wage invisible war against a series of increasingly bizarre and deadly alien monstrosities, whose source and purpose are a frightening mystery. And if those challenges weren’t enough, a homegrown threat rises, the sleek and stylish weapon-spawning killers known as the Vampires, who aim to bleed out Gantz!