Human movements look like a struggle to escape from that cubic structure. However, to escape is impossible because the cubic structure freely transforms in size and shape, like a living creature, more alive than the human bodies. Human bodies just repeat the same choreography, like a passive creature.
The main character in this film is actually not human but rather the cubic structure, which is a social mold that makes humans unable to be completely and purely themselves. The experimental animation <MOLD> appeals the viewers recognize the social mold and invisible unreasonable rules around them with the fear of ‘oppressed freedom’.