Letters like "FSET" designate the specific production studio, sub-label, or distribution network responsible for the content.
Codes like "FSET-189" function as catalog numbers used by distributors to organize vast libraries of content. The alphabetical prefix identifies the specific studio, production house, or thematic series, while the numeric suffix denotes the release order. -FSET-189- Maki Hojo Swimming Class -Censored-