Science and technology are highly developed, brain-computer interface (BCI) technology has become popular, neural networks have become the norm, and virtual reality and augmented reality have blurred the boundaries with reality. The giant company "Nous Technology" occupies a monopoly in the field of neuroscience. The social structure is torn apart, with the upper-class elite living in the glamorous "Glass District" while the people at the bottom are struggling in the chaotic and dirty "Rust Belt District". This kind of social anxiety under the surface of technology provides a breeding ground for the growth of "heart ruins".
