Kurono es un chico normal, estudiante de secundaria, que en un mundo egoísta, tan solo se preocupa de sí mismo. Sin embargo se ve obligado a ayudar a Kato Masaru, amigo suyo de la infancia, que pretendía salvar a un vagabundo caído en las vías del tren. Kurono y Kato consiguen salvar al vagabundo, pero no sus vidas y son arrollados por el tren. Cuando parece que sus vidas han acabado aparecen en una extraña sala con una esfera negra, llamada GANTZ, en la que encontraran armas y trajes, si quieren volver a casa y seguir vivos deberá participar en un "juego" de peligro y horror sin precedentes.
Gantz (Temporada 1)
It's the Beginning of a Brand New Day (Episodio 1) 7.0
Guionista: Masashi Sogo
Fecha de emisión: 2004-04-13
Duración: 25 min
Sinopsis: After Kei and his childhood friend, Kato, are torn into bloody pieces by a speeding train, they awake in an unfamiliar room, surrounded by strangers. In the middle of the room is a bizarre black sphere: the Gantz.
Episode 2 (Episodio 2) 4.2
Guionista: Masashi Sogo
Fecha de emisión: 2004-04-20
Duración: 23 min
OK, Here Are Your Scores (Episodio 3) 8.0
Guionista: Masashi Sogo
Fecha de emisión: 2004-04-27
Duración: 25 min
Sinopsis: The scores are tallied and Nishi explains some of what he knows about the rules of the strange world of the Gantz. The unusual situation grows even odder the next day when Kei wakes—and finds that this nightmare is no dream.
That Means at the Time... (Episodio 4) 7.5
Guionista: Masashi Sogo
Fecha de emisión: 2004-05-04
Duración: 25 min
Sinopsis: Seemingly back among the living, Kato must protect his brother from their hateful aunt. Meanwhile, Kei’s special suit gives him an advantage against the bullies at school. But will it help him when Kishimoto appears at his door?
All Right! (Episodio 5) 7.5
Guionista: Masashi Sogo
Fecha de emisión: 2004-05-11
Duración: 25 min
Sinopsis: Despite his best efforts, Kei remains unsatisfied during Kishimoto’s overnight stay at his apartment. At the place Kato calls home, more ugly evidence of abuse piles up.
We're After You (Episodio 6) 6.0
Guionista: Masashi Sogo
Fecha de emisión: 2004-05-18
Duración: 25 min
Sinopsis: Kato’s patience is being tested. At home, the abuse dished out by his aunt pushes him to the breaking point. Meanwhile, at school, a group of bullies forces him to take decisive and drastic action.
Uh-oh! (Episodio 7) 8.0
Guionista: Masashi Sogo
Fecha de emisión: 2004-05-25
Duración: 25 min
Sinopsis: A new round begins for the gang. Appearing before the Gantz, they find themselves joined by a diverse group of fresh players. As the game gets underway, Kei panics when he realizes his suit is nowhere to be found.
I'll Kill You Without a Moment's Hesitation (Episodio 8) 6.0
Fecha de emisión: 2004-06-01
Duración: 25 min
Sinopsis: As the group prepares to track down the Suzuki alien, Tetsu’s gang is creating conflict and Nishi’s smart mouth isn’t helping the situation. When tensions boil over, blood is spilled before the hunt even begins.
He Can't Shoot (Episodio 9) 7.5
Fecha de emisión: 2004-06-08
Duración: 25 min
Sinopsis: Kato is forced to take action to save Nishi from certain death, but he may not be ruthless enough to kill the Suzuki alien. Time is running out for yet another player trapped in the cruel world of the Gantz.
Kato, You Wait Here (Episodio 10) 8.7
Fecha de emisión: 2004-06-15
Duración: 25 min
Sinopsis: The group is beginning to figure out the rules of the twisted game in which they are caught, but survival is still far from guaranteed as the battle with the remaining Suzuki aliens erupts.
Please Die (Episodio 11) 8.0
Guionista: Masashi Sogo
Fecha de emisión: 2004-06-22
Duración: 25 min
Sinopsis: Kei, suitless and outnumbered by the Suzuki aliens, must face the biggest monster alone. When the battle ends and the scores are tallied, the group sees that there might be a way to escape their strange fate.
