In order to deal with the invasion of the "Legion", a completely independent unmanned combat weapon developed by Giardi, its neighboring Republic of Sangnolia developed the unmanned combat weapon Destruction Force. However, the unmanned fighter is just an empty name, and it is actually driven by people who are not recognized as "humans" - 86 - and is used as a prop. The captain of the "Vanguard Squadron" composed of "86" is a young boy, Xin Ai, who fights for a certain purpose in a desperate battlefield where he can only wait for death. There, Rena, an elite of the Republic's army, took office as the new command and control officer. She had the experience of being rescued by 86 when she was a child, so she wanted to treat them who were despised as "human pigs" as normal humans. The boy who was used as a prop just for fighting and the elite talent who was placed with expectations for the future, the two people who should not have had any intersection, saw the future in the fierce battle -