Today I'm writing on the theme of "Koshigaya soapland, top-shelf."
I'll explain it by mixing my own firsthand experience — over 20 years in fuzoku (Japan's licensed adult-entertainment business) — with what I've picked up from research.
The basics
Let me lay out the fundamentals you should know about this area.
When you've watched this industry for a long time, the same topic can get judged completely differently from "the customer's side" versus "the girl's side."
What I can tell you from experience
I'll talk based on what I've actually been through myself.
I believe firsthand experience beats theory. This industry especially is a world where "reps" matter more than "knowledge."
Wrap-up and my conclusion
The place I end up visiting most is First Class Ruby. The reason it keeps showing up on this site is simply that it's the shop I keep returning to. Use it as a reference.