At night, Maya finds out that from Aya that Shin has taken the Reiki, the ceremonial chokutō encased in the family room, with him. Bunshichi lets Mitsuomi know that Mana is spreading word that they have been spending a lot of time together. Meanwhile, Shin is using the family katana to seek revenge for his fallen members. Bunshichi contacts Mitsuomi from the hospital, saying that a student named Ishimatsu fell prey to a "katana hunter". Mana, who slept with Mitsuomi, gives him a present before he leaves, which contains earrings and a flash drive. Mitsuomi and Bunshichi watch its content, which shows footage of Mana spending time with Shin, but after they see themselves in the recording, they then witness how insane Shin was back then. It is revealed that Mana took the role of Shin's girlfriend to record his actions. Moreover, it was because of the Reiki that brought on his uncontrolled aura in the first place.