The residents of the Kokorogaoka Housing Complex refuse to vacate their homes for the sake of urban development, so they declare its independence from Japan as an autonomous borough. The one to make this announcement is none other than Hanasaki's older brother, who ran away from home years ago. Hanasaki asks Akechi for help, but Akechi refuses to do any job he hasn't been hired for and confines Hanasaki to the building. Then a mysterious package arrives, and its contents reveal that Twenty Faces was the one behind these current events. Unable to wait around, Hanasaki heads for the housing complex himself... (thetvdb.com)