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Aoi Yukimura, a shy and indoorsy high school girl, has always preferred the comfort of her room, haunted by a childhood fear of heights. Her quiet life is upended when she reunites with Hinata Kuraue, her energetic and adventurous childhood friend, who drags her into the world of mountain climbing. Starting with small hikes, Aoi rediscovers the joy of nature and the thrill of reaching new summits, joined by Kaede Saitou, a seasoned climber, and Kokona Aoba, a cheerful beginner.
