Mountain Hiking: The Ends of the World.The squad take a 'field trip' to the mountains where some mechanical observers from the previous age need a maintenance check. Kanata, Kureha and Noël are forced to carry heavy backpacks on their hike up. While they find the first observer quickly, the next one lies at the top of a mountain. They take a break at a running river but soon return to find their backpacks ravaged of their food and their compass...