Personally, I was always curious as to whether or not they'd put in new classes to those two empty spaces in the character creation screen, and they did. Just not one all can agree on.... Or could it?
My idea is that they do make the Chaser Arcana (male class name), but actually give it the option to be either male or female. It would satisfy us males and our infinite search for the best boobies while letting those who want the male class just to be there get their wish. Besides, I saw the mechanics for the class, and while the naked dance club scene pissed me off, the actual fighting seemed promising.
As for story, I'd say it was just a malfunction with Mother that this certain Arcana could be both female and male. That way, there'd be no plot holes.
It's just an idea, but I hope it gets encouraged more than a pure male class or no new class at all.