The story focuses on an intense, protective bond between Aki and Fuyu. While their romantic orientation isn't explicitly defined, their deep devotion suggests a space for non-heteronormative emotional connections.

Aki challenges traditional masculine archetypes by being a protagonist who is not traditionally brave. His strength comes from empathy and caretaking rather than physical dominance or stoicism.

The subterranean setting functions as a post-national space where traditional ethnic markers are obscured. The declining community suggests a blended, survivalist collective rather than a homogeneous group.

The film explores anti-institutional themes through a community in decline. The longing for the outside world serves as a metaphor for rejecting oppressive, enclosed systems.

Fuyu is a central character whose sickly and mute status drives the emotional inquiry. The narrative uses his physical frailty to explore agency through non-verbal communication.