After Naoto, RyuZU, Marie, and Halter’s mission to save Kyoto succeeded, the group must lie low. Branded as terrorists and with Marie presumed dead, the new allies decide to gather more information while acting out the daily lives of high school students—something Marie isn’t used to! While undercover, Marie receives valuable information through a coded message: The government is still abusing core parts to endanger civilians. Meanwhile, RyuZU wishes to find her little “sister,” AnchoR, but when the fellow automaton appears, is she a friend or foe?