The "Soul" in the title is a play on "Seoul," and the locations often include quiet cafes, Han River parks, and the colorful alleyways of the capital city. The Legacy of the Series

: This is part of a "gravure" or digital idol series that showcases young Korean models in various urban and indoor settings around Seoul.

: The mention of a specific catalog number ( knza002 ) might imply it's a physical release or a digital one through a specific label or platform. The popularity could be inferred from it being labeled "top," but without more context, it's hard to gauge its critical or commercial success.