Nene and Kou want to learn more about their mysterious friend, Hanako-kun-and what better way to do that than school mystery number five, the 4:00 P. M. Bookstacks! the rumors say that a secret door in the library leads the way to a supernaturally special collection. the Bookstacks know everything about everyone whos ever attended Kamome Academy-past, present, AND future! But whatever you do, dont read the red books. . . or your future will be drenched in blood!