Gantz is a Japanese manga series written and illustrated by Hiroya Oku. Gantz tells the story of Kei Kurono and Masaru Kato, both whom died 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.
Both the manga and anime are noted for their heavy violence and sexual content.
The Gantz anime adaptation, directed by Ichiro Itano and animated by Gonzo, contains 26 episodes divided into two seasons. A series of two live action movies based on the manga were produced and released in January–April 2011
A pair of high school students, Kei Kurono and Masaru Kato, are hit by a subway train in an attempt to save the life of a drunk homeless man who had fallen onto the tracks. Following their deaths, Kurono and Kato find themselves transported to the interior of an unfurnished Tokyo apartment.
The pair soon realize others are present and find that they are not able to leave the apartment. At one end of the room there is a large black sphere known as "Gantz".
After some time in the room, the Gantz sphere opens up, revealing a bald naked man with a breathing mask and wires attached to his head, and various items for them to use. These include the custom fitting black suits which give them super-human strength, speed, stamina and damage resistance, a controller which acts as a radar and stealth unit, and three types of weapons.
Thanks for praising me @Friend_Busa, I will continue to search for more. <3
If you like Attack on Titan, Danganronpa and or any adult themed genre, then you are gonna love the plottwists and death scenes with interesting characters, No one is save.
Silly @Friend_Busa, Mikasa isn't in Gantz. Hahaha you are so funny. xD
That imposter is called Tonkotsu, she is a super hot support character, trust me, once you see her you are going to be overwhelmed.