I've been seeing pics from this set since my high school years and no source was ever given.
I seem to recall there was a blonde catgirl with, I believe, white ears/tail also.
In fact, tell you what: let's make this a thread for catgirl games that aren't Let's Meow Meow, Pure Pure, or Words Worth.Here's the best I can find of Silver Gene.http://www.r18game.com/candle/silver/silver.html