Aoi favors indoor activities and is terrified of heights, while her childhood friend Hinata enjoys showing off her mountain climbing skills. They used to watch the dawn from the top of a mountain when they were kids, and now they've chosen to take up mountain climbing in the hopes of seeing it again. As they learn the ropes of the activity, they have cookery battles with mountaineering gear, climb minor hills in their neighborhood, and meet new climbing buddies. When will they be able to see the sunlight again?