The next Novel World is "The Crane Maiden", where the story's timeline has set back to the Stone Age. Bakumaru's group investigate while finding themselves at home in the stone mansion of the elderly (cavemen) couple, and a young girl they have taken in named Tetsuko. Knowing Tetsuko as the crane maiden, the group trails and peek into her room, only to find a mammoth weaving instead! Another problem is the old man being a craving meat lover, whose specialty is mammoth. Can the team prevent the old man from peeking in time?