Ken has guts! Do for a legendary monster?."Where has the leopard mask been all this time?" As the Kirumins ponder this question, they receive news that drinking water from a shrine near the Kamihama Forest Park will turn you into a demon. When the Kirumins head to the shrine to find out the truth, they are confronted by the monsters that guard it! Ken tries to turn into a mouse with the Kirumin to get out of the pinch, but to his surprise...