Here are some general points that might be relevant:

The "long story" of the video follows a linear progression of degradation and dehumanization:

Historical Context: It represents the early 2000s era of Japanese underground cinema (V-Cinema), characterized by high-concept taboos and niche fetish aesthetics. Summary of the "Legend"

RPD-08 Series Label: The "RPD" designation suggests this is the eighth entry in a serialised project, which some community discussions link to role-playing game (RPG) elements or episodic digital art releases.