The events take place in alternative 2019 in Japan. Thirty years ago, the Media Development Act was passed. An Armed Secret Media Development Unit announced censorship of books, using human rights and youth protection from negative influence as a pretext, along with the general indifference of society at the time. At the same time, to resist censorship, a Library Freedom Act was passed, allowing—by permission of local authorities—for the library to oppose the central government and organize resistance. It was resistance within the law and with many restrictions, but still with weapons in hand.
Why, in a democratic country for more than 30 years now, this small armed standoff between two official organizations has been going on on lawful grounds—and why no one stops it—still isn’t fully clear and clearly relates to internal political struggle among the ruling circles.
And then 22-year-old Kasahara Iku—a somewhat silly athlete girl with a kind heart and fighting spirit—joins the armed forces of the library in order to defend people’s right to freedom of reading. From childhood, the girl is obsessed with the heroic image of her “prince”—a brave officer of the library forces—who once saved her from the agents of the Media Development Institution. But she doesn’t remember his face or even his name…