In the future, with Japan's economy in stagnation, an experimental municipality is inaugurated by Taira Kiyoshi by direction of Prime Minister Washida Tsuguaki; the city's cabinet members, chosen by AI unit Solon, are all young enthusiasts.

Maki Aran's reformative directives are opposed by former mayor Hosaka Shigeo and other city authorities, who argue for reinstatement of the city council; Aran refuses to cave in and goes out to listen directly to the voices of the residents.

Aran's reforms extend to streamlining of human labor by utilization of AI; Sachi's mother Sagawa Tae, a middle school teacher, is designated as a candidate for resignation.

Suspecting that Aran is scheming to take revenge, Washida orders that Aran be removed from his post; Sachi reveals that Aran had created a mysterious AI girl character in a hidden room of his residence.

Kiyoshi acquires a diary that holds the truth about the monetary contribution scandal; it is revealed that the secret AI character that Aran created is a virtual resurrection of his victimized childhood friend.