Ken Kyuki creates a battle royale game called, "The Rainbow Brigade", where 100,000 high school students are split into 20,000 teams of 5, and they must fight in a dome covered created world which they can't escape. So each assigned team will have to be the last ones standing in brutal war games and missions to go home free. Zero, a 17 year old student discovers the help from his teammates to kill everyone, and to survive the 100,000 player battle royale.