Editing Gantz (section)

==Plot==
{{See also|List of Gantz characters{{!}}List of ''Gantz'' characters}}
High school students [[Kei Kurono]] and [[List of Gantz characters#Masaru Kato|Masaru Kato]] die after being struck by a subway train while attempting to save a drunk homeless man who had fallen onto the tracks. Upon their deaths, they awaken inside a barren Tokyo apartment alongside other confused participants. Trapped within the room, they encounter a large black sphere known as "Gantz". The sphere assigns missions where participants must hunt and kill alien targets hidden on Earth, providing them with advanced weaponry—including powered suits and [[Raygun|energy weapons]].

During missions, the participants are transported to the target location and confined there until all enemies are killed or the time limit expires. Normal humans cannot perceive the players or the aliens. Those who survive are awarded points based on their kills. Upon accumulating 100 points, a participant gains access to a menu offering three choices: returning to normal life with erased memories; obtaining a powerful weapon; or reviving a deceased teammate. After their initial missions, Kurono and Kato face brutal battles that result in heavy casualties. During their third mission, Kato sacrifices himself to defeat the final target, allowing Kurono to survive despite severe injuries. This experience profoundly changes Kurono, who adopts a more heroic mindset and resolves to revive his fallen comrades. He later leads a new team of Gantz players, demonstrating exceptional combat prowess and leadership. Eventually, Kurono revives Kato, only to perish himself in a subsequent battle against a group of vampires.

As the story progresses, the rules of the missions evolve. Ordinary humans become able to witness the battles, and the aliens grow increasingly formidable. The participants eventually engage in a joint mission with a rival Gantz team from Osaka. Kato, now the central figure, fights desperately to revive Kurono, culminating in a battle against the powerful alien Nurarihyon. Though Kato succeeds in defeating the creature, he is left critically wounded.

An experienced participant named Joichiro Nishi later reveals a hidden "catastrophe countdown" on the Gantz sphere, indicating an impending global threat. One week later, Earth is invaded by a massive alien force intent on exterminating humanity. Kurono and his allies utilize Gantz technology to mount a defense. It is eventually revealed that an advanced alien species provided humanity with Gantz as a means of survival, though their motives remain unexplained.

In the final confrontation, the alien leader Eeva challenges humanity, threatening to destroy the planet unless Kurono faces him in battle. With the world watching, Kurono, aided by Kato, defeats Eeva and prevents Earth's annihilation. The series concludes with Kurono and Kato returning as heroes.