Which brings me onto my theory, which is that I firmly believe that Eva, after GGGB, was always intending to make a male MC game. I remember her development diaries she posted back then, reflecting on the fact that virtually all the successful AVNs are with a male MC, asking herself whether the ought to also go this route to reach the same level of success. She was further saying that she felt done with the GGGB type of storyline, and was looking for some new challenge.
But then she got scared, I think, because all of the polls she was running, as well as the sentiment in her comment section, showed that the female MC was one of the premiere reasons for supporting her. So she gave in, settled for having two main characters, hoping that it would satisfy both ends of the spectrum and give herself the challenge she sought, but not fully recognizing the momentous ordeal this would become.