No, you don't. The last students, just like the first ones, will have a points system. Kim, Debbie, Kate, and Lisa started with 0 points. That student's initial relationship will have a negative impact for every existing relationship (over 1) when she arrives. That means that you will have less margin about choices with negative results (points) to win her. While you have a negative-point relationship with her she will be bitching at you. The fastest you get to the positive-point relationship (taking the choices with the most positive points or having fewer relationships), the fastest you will discover how lovely she can be. Don't worry when I talk about less margin. For every girl, there is enough margin to take some negative impact choices.