Deca-Dence - S01

Far in the future, lifeforms called Gadoll suddenly appeared and became a threat to humanity. The last surviving humans on Earth live inside the Tank, a lower district of the giant mobile fortress Deca-Dence. The Gears who live on the upper floors are warriors who go out to fight as part of the Power, while most Tankers are happy to support from the backlines, butchering Gadoll meat and reinforcing defenses. Natsume is one of those who would rather go to the front lines; undeterred by her prosthetic right arm, she wants to join the small number of Tanker soldiers who fight alongside the Gears. But while her peers at the orphanage each receive their work assignments, Natsume's enlistment to the Power is still unapproved. In the meantime, she starts a job as a cleaner on an armor repair team led by the hard-nosed and apathetic Kaburagi, who seems to be more than he lets on. Though he is initially cold to his idealistic subordinate, he soon sees in her the potential to upset the status quo of the world. As Natsume's new mentor, Kaburagi prepares her for the special and unique role of a game-changing bug in the system.