Library Wars: The Last Mission

Set 18 months after movie "Library Wars." After the government's enactment of the Media Betterment Act, battles wage between the Betterment Squads and the Library Defense. The Library Defense resists censorship and advocates freedom of expression. The biggest battle awaits for the Library Defense.
(Source: AsianWiki)
~~ Adapted from the novel with the same name by Arikawa Hiro.