"Kawagoe fuzoku, part-time work" — some people hear that and immediately know what you mean, and some don't.
I'm 42 and still out in the field of this world, so I'm going to lay it out from a real, on-the-ground point of view.
Why this topic matters
Information about fuzoku (Japan's licensed adult-entertainment business) is honestly more scattered than you'd think. Beginners especially tend to end up not even knowing where to start looking.
What this actually means
In a word: "whether you know it or not changes the quality of the experience."
What I've written here is the essence of the knowledge I built up over 20 years.
In closing
If you've got questions about this topic, drop a comment or hit me on social. And go check out First Class Ruby while you're at it.