Yama no Susume enters its third season as childhood friends, Aoi and Hinata, embark on a mountain climbing adventure. While Aoi is a homebody with a fear of heights, Hinata is outgoing and passionate about mountaineering. Their goal is to witness a sunrise they saw together in their youth, from the top of a mountain. This season, they explore stunning mountains adorned with vibrant autumn leaves and make new connections with local schoolgirls, adding even more color to their story.