Overview: A corpse of a puppeteer, Mitsuhashi Ryoko, is discovered by an elementary school student named Shibata Keita. Ryoko was famous for disliking children and was thus tied to Sakai Nanako, a school club instructor often visiting Ryoko's home due to complaints from parents. The team discovers shocking facts regarding the apparently accidental death of Ryoko's husband. A shocking truth emerges...