I've Had Enough! - S2.E11

Having succumbed to altitude sickness, Aoi is forced to stay behind with Kaede. Hinata and Kokona make it and experience the rising sun atop the summit of Mt. Fuji, and walk around the caldera and to the highest point of Japan. Aoi is extremely frustrated and has to descend the mountain with Kaede, where they later meet up with Hinata and Kokona and head home together.