In the age of eternal war, 6,000 years before the infamous gamer duo “Blank” arrives in the world of Disboard ruled by the god Tet, humanity must face superior races in an unequal struggle. Riku, the leader of the humans, one day encounters an unusual Ex-Machina on the battlefield, whom he names Schwi. She challenges him to a game and sets conditions he cannot refuse.
As an emotionless machine, Schwi wants to learn from him how the human heart works. After some predictable initial difficulties, the unlikely pair begins their fight for peace among the various races. To lead humanity out of oppression and end the eternal war once and for all, the two must risk everything...