The contrast between a refined, beautiful woman and a "low-class" or "rebellious" attitude is a common fantasy in Japanese media. It suggests a level of intimacy where the performer shows a "rawer" side of her personality to the viewer that she wouldn't show to the general public.
Bleached hair, heavy makeup, or street-style clothing that departs from the traditional "girl next door" look. HD SSNI-441 fair slender my girlfriend is DQN c...
In this specific release, the "DQN" element is a stylistic choice. It typically involves: The contrast between a refined, beautiful woman and