Zoroku is making a trip to Yokohama to meet a client, so he takes Sana with him. Accompanied by Ichijo, Sana is impressed by the sight of the ocean and the robot-operated factory that she visits, and enjoys her day out to the fullest. Rejoined by Zoroku, the trio visits Chinatown, but then Asahi and Yonaga suddenly appear after being unseen ever since the research facility incident was resolved. The twins run away as Sana and Ichijo chase after them...