After reading through all the materials related to Kameda Atsushi's case, Nanahara Takeshi made a photocopy of Kameda Atsushi's "cipher book" and then left Hirarano General Police Station with Kiyomi Liuli, taking a taxi directly to Kokuyou Park. They planned to make use of the remaining time of the day to conduct a field investigation, and since Kokuyou Park was not far from the station, they arrived shortly.