In the near future, the federal government creates a committee to rid society of books it deems unsuitable. The libraries vow to protect their collections, and with the help of local governments, form a military group to defend themselves—the Library Forces! Iku Kasahara has dreamed of joining the Library Defense Force ever since one of its soldiers stepped in to protect her favorite book from being confiscated in a bookstore when she was younger. But now that she's finally a recruit, she's finding her dream job to be a bit of a nightmare. Especially since her hard-hearted drill instructor seems to have it in for her!