To anyone who is complaining about how this game (or any other games you might encounter) doesn't let you change the MC's gender: I don't know if I should say that you're overestimating or underestimating Japanese games With my experience playing both male and female oriented games, I come to this conclusion: "like it or not, a (Japanese) game is either male or female oriented, and usually it's for straight people". There are LGBT-friendly games too, but I'm talking about the majority of them. Even in games where you get to choose MC's gender, there might be some things that suggest which one is the target the developers aimed for, male or female?, e.g they release more bishoujo than ikemen, etc.
Don't believe me or want to argue? You can just play more games and see for yourself then, this is only what I deduced. So, no offense, but if a game doesn't suit your taste, you can find others to play then, because complaining isn't get you anywhere, as it didn't get me anywhere either.
(Side talk: I played one game in a male-oriented series that got an FeMC when it was remade, just to make it more interesting to players. Since then the FeMC have never been acknowledged as canon and the later games in the series never have any other female MC too. An example of how stubborn the developers could get regarding their chosen targeted audience.)