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!

    To help out her desperately poor family, she takes on a part-time job. Then, one night, a boy snatches a kiss from her and offers her money, saying, "I'll buy you." Who is the boy who stole Mio's first kiss...!?

    But he despairs when he borrows her eraser and sees she’s written the name of another boy—Ida—on it. To make matters more confusing, Ida sees Aoki holding that very eraser and thinks Aoki has a crush on him!

    The emperor Ryuki, however, refuses to take command, leaving everything to his advisors. Shurei is asked to become a consort to the emperor to persuade the ne’er-do-well ruler to govern.Shurei enters the palace as Ryuki's consort, but he has yet to seek her out. It is rumored that men, not women, share the emperor's bedchamber. Shurei must think of a way to stop the emperor from shirking his responsibilities, but she has to find him first!