Tonbokiri and Nihongou arrive at the citadel, completing the Three Great Spears of Japan. After seeing bluebirds on the engawa, Nihongou gets the idea of catching one, no matter what. They work together to chase them down. That night, Akita Toushirou becomes frightened by a ghostly apparition. To exterminate the ghost lurking in the citadel, Nikkari Aoe springs into action.