The story takes place in an alternative 2019 Japan. Thirty years ago, the Media Development Law was passed. An armed Secret Media Development Unit declared censorship on books, using as a pretext the protection of human rights and youth from negative influence, along with the general indifference of society at the time. At the same time, to resist censorship, the Library Freedom Law was adopted, thanks to which, with local authorities’ permission, the library could stand against the central government and organize resistance—though according to the law, with many restrictions, but still with weapons in hand. The reasons why, in a democratic country, for over 30 years, small armed confrontation between two official organizations has been continuing legally—and why no one stops it—are still unclear and clearly relate to internal political struggles among the ruling circles. And so, 22-year-old Ikо Kasahara, a somewhat foolish but kind-hearted and fighting-spirit athlete girl, joins the library’s armed forces to defend people’s right to freedom of reading. From childhood, the girl has been obsessed with the heroic image of her “prince”—a brave officer of the library forces who once protected her from agents of the Media Development Institution, whose face and name she decisively cannot remember…