Events grow more serious as the series progresses as atrocities are committed by both sides, thrusting the main characters into the middle of a conflict between literary superpowers, the British Library and Dokusensha, who are both trying to collect ancient artifacts (books, of course) to control the entire world and even rewrite history. After a horrific collision between the two superpowers, Nenene and the Paper Sisters set out to find the missing Yomiko to learn the truth about the conflict and save the world from literary terrorism.