Plot: A woman claiming to be the culprit visits detective Kajitani (Takeda Rina) from the investigation headquarters. Kajitani, who is pursuing a serial killer who has shocked the whole of Japan, warns her by saying, "If it's just a prank, I don't have time to bother with it," but the woman says, "I don't think there will be any more victims," ​​and hands her a notebook