So you say you're new to anime and want to know what games to play on a porn game site. Is all my facts lined up?
In that case, look around for the Meet n Fuck series. The images are ripped from other VNs and there's a bit of work needed to get to any sex, but it's pretty good overall. Otherwise, I could recommend games like Slavemaker, Whoremaker, and maybe Brothel King. But let me know if my info is wrong.