The future is full of 'Legions,' robots that serve the needs of humans. Nanami, a fresh young graduate from the technician academy, is assigned to the 7th Prescient to be the repair technician for the Legions stationed there... Or so he thinks! When he gets there, he's greeted by a Female Legion who snaps when she runs out of donuts to eat. To vent her frustration, she starts throwing pieces of concrete at Nanami. Soon after, another female Legion tells Nanami that he's the new chief for the 7th Prescient. Unfortunately, the pieces of concrete that were thrown at him earlier were the remains of the 7th Prescient! Is Nanami the new chief of a pile of rubble?!