On the surface Pretty Woman is a simple boy meets girl story – an age old crowd favourite. However, I would argue that it is a complex multi?protagonist story?each with their own A plot and B plot.

Julia’s A plot goal was getting the money she earned as a result of her deal with Richard. Where as her B plot was getting the love interest that Richard became after the mid point of act 2, and the C plot was paying the rent with her party animal flat mate.

Richard’s A plot was to seal the big deal he was working on, whereas his B plot was getting Julia as part of the love story.

As both of their B plot’s shard the same goal, it provided a sort of compound effect, which in turn made it more prominent for most viewers.

Point is I think your instinct to write a logline for both of the characters is right. In multi protagonist stories the writer can and should write a logline for each protagonist.

I believe the love story is used to?comment?on class segregation, both characters tackle the differences between the classes from different points of view.

She stands out in the rich and snooty crowd like a sore thumb, and Richard needs to either accept her as she is or lose her:
After a cold-hearted businessman falls in love with a street-wise prostitute he must learn to accept her into his life warts and all or risk losing her forever.

For Julia the challenge is to fit in the new environment, yet still remain true to herself:
After a street-wise prostitute falls in love with a rich business man she must learn to shed her inferiority complex around his friends or risk losing him forever.