I played it years ago but cant remember its name, I have done looking but no luck.
Essentially you are in debt to a monster girl and your only way of paying it off is selling other monster girls, it has a huge variety of girls which you slowly unlock through playing and you can mix and match, creating offspring with other monster girl races that can result in mixed races having different physical features such as colors or horns. Its was a good idea to keep a few good ones for "breeding" and selling their offspring . the graphics weren't amazing but it wasn't bad either, keep in mind this was YEARS ago so it may have improved.
Essentially you are in debt to a monster girl and your only way of paying it off is selling other monster girls, it has a huge variety of girls which you slowly unlock through playing and you can mix and match, creating offspring with other monster girl races that can result in mixed races having different physical features such as colors or horns. Its was a good idea to keep a few good ones for "breeding" and selling their offspring . the graphics weren't amazing but it wasn't bad either, keep in mind this was YEARS ago so it may have improved.