I've been playing the game purely for the gay content myself. As others have said, you can't advance the story without a lot of female content, but the story is not the most interesting part of the game. You can just ignore it, and then the game works fine as a gay slave manager. You'll probably want the action pack though, as the actual gay porn is scarce without it.Can you have male slaves, and can you avoid the female stuffs?
It's kind of funny that a straight game does a better job at being a gay harem simulator than 90% of actual gay games...