Despite being a western VN, PC has the flair, cinematography and the eroticism of Japanese VNs, and Japanese media in general. Most AVNs on here are inspired by typical western porn/shows, but PC is like a love letter to fans of the Japanese VNs but with more western sensibilities.
Very few VNs on here have the style and drama that PC has. TD and GIL clearly have a strong artistic direction, and the game has maintained the same focus and tone for the 5 years it's been under development without losing or changing much, except the art getting exponentially better with time.
The noir elements remind me heavily of the older Japanese mystery VNs, such as Yu-No, Higurashi and even Cartagra. PC definitely has a very unique flavor that few other games on here can match.