The Pool: Clear Danger!.Complaining about the hot summer weather, Kanaka decides that she and her friends should go to the public swimming pool to relax. However, the place is overcrowded with people, so she uses a wristband device signalling to a round receiver to find an uncrowded place to swim. Since Kazuto cannot swim, Kanaka gives him a mysterious hair gel that allows him to swim, but it backfires when he swims too fast. Kanaka uses her wristband device again to take the others to a beach on a secluded island. While Kazuto and Narue are building a sand castle and Maruo and Yagi are exploring the place with exotic animals, Kanaka is seen riding a mammoth, chasing the four to a cave. Kanaka soon falls off the mammoth and damages her wristband device, separating Maruo and Yagi from Kazuto and Narue on the island. Maruo and Yagi later find Kazuto and Narue crossing a bridge, but it breaks and Narue falls into the water. Kazuto jumps in to save her, but they both drop into a waterfall. They are miraculously saved by Bathyscaphe, who interrupts their adventure and returns everything back to normal. Due to her misbehavior, Kanaka has her wristband device confiscated by Bathyscaphe, who states that they were all involved in a virtual reality game.