The entire movie is just twelve bear cubs sharing a dorm on a mountain, doing nothing particularly important. There are no stakes, no plot momentum, no reason to care except that watching them exist together is enough. It moves at the speed of actual friendship, the kind that builds in small moments between meals and bedtime, not dramatic revelations. This is a film made for people who think "nothing happens" is the highest compliment an anime can receive.
Twelve bear cubs make their home in a dormitory perched at the top of a mountain. The film is a comedy built around the cubs and their shared life in that mountaintop residence, and its title names two of its figures, Jackie and Katie.