Ah, I see it now =) Well, the situation is a bit different here than it is in Persona. Chie and Yukiko are plot characters there. And they are introduced as such. You get a short introduction for the two possible girls on your first day. But since it is a free sailing after that I do feel that forcing specific girls onto the player would be a bit too much. And most girls you only start meeting only in October due to plot reasons.