Gantz

Gantz (ガンツ Gantsu) Is a manga series written by Hiroya Oku. Published in Weekly Young Jump, the manga art is made ​​from scenes in computer graphics, mixed with hand drawn characters. Received an anime adaptation of 13 episodes by Studio Gonzo, and a direct sequel, titled Gantz Second Stage, also 13 episodes, shown by Fuji Television.
In Brazil, the anime was aired by pay channel Animax in 2006 and the manga is published by Panini Comics since 2007.
Gantz tells the story of 16-year-old Kei Kurono who dies hit by subway with a friend, Katou Masaru. After that the two are transported into a room to play a game bloodthirsty, violent, competitive, driven by a "black sphere" called Gantz.
Despite the anime series has an end, the manga series is still being published today.

Kei Kurono is an individualistic young, insecure and perverted. Always hated everything and everyone. One day on the subway is an old acquaintance of his, who does not see since I was a child, Katou Masaru. Initially try to avoid it, but sees a beggar drunk falling on the tracks. Katou and Kurono trying to save him, only to end up dying trampled. They are surprised to see that they were taken into a room together with other people. In the middle of it is a black sphere, Gantz. She plays a song and passes a mission to kill aliens. Shows the arsenal of weapons and the uniform of each. Their mission is to survive the game and kill the aliens indicated within the stipulated time
The story unfolds in a surprising way, unexpected. The growth of the characters is something remarkable. With the coexistence of death they change their way of thinking. Almost all have horrible traumas, but with the struggles of Gantz they learn to overcome adversity, getting stronger and more determined. The plot will show the fighting against the Hunters possible threat of Aliens in the contemporary world. The narrative focuses on the events before and after missions, showing how the Hunters live their daily lives carrying this burden, keeping her secret away from anyone.