Nene, Hanako, and Kou have reached the top of the Misaki Stairs, where a mysterious and bewitching woman awaits them. Will Nene get her friend back, or will she vanish along with her?

In search of Hanako’s secrets, Nene and Kou enter the fifth Wonder, the 4 O’clock Library. Its books contain the past and future of every student their school has ever had, but some knowledge comes at a price.