Toilet-bound Hanako-kun, Vol. 3

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 who's ever attended Kamome Academy-past, present, AND future! But
whatever you do, don't read the red books...or your future will be drenched in
blood!