A show about friends climbing mountains sounds simple until you realize it's actually about watching someone with a real, physical fear slowly prove to themselves that they're braver than they thought. The animation captures the actual silence of high altitude, the specific ache of your legs on the way down, the way your lungs feel when you reach the peak. Every summit is small and ordinary and somehow matters more than anything else on TV because these characters earned it together, one scared step at a time.

Aoi Yukimura has long struggled with a fear of heights, but she will not let it hold her back. Looking back on how far she has come, she feels the urge to head into the mountains again. When Koharu Senjuin, head of the Mountaineering Club, invites her to visit after school, Aoi admires the members' drive to win competitions but would rather climb at her own pace. The visit leaves her asking why she climbs at all. With support from friends like the lively Hinata Kuraue, she looks for an answer while training for a second trip up Mt. Fuji. The fourth season opens with compilation episodes that revisit earlier moments before moving on to new stories.