Accompanied by Kou, Yashiro seeks out the 4 o' Clock Library. Instead of finding Hanako's book, Yashiro glances at her own and in the "Future" section, sees herself finding out Hanako's real identity and learns his real name: Amane Yugi. However, the pages turn red and a humongous shadow-like reflection of herself appears to devour the both of them, although Hanako arrives just in time to slay the creature. They then meet No.5 of the Seven Mysteries and the curator of the library: a spider-like supernatural named Tsuchigomori who displays an outward persona as a teacher in school...