This is a rather typical modern story. A teenage girl has to rebel against the system around her. Most of the men and boys she meets are her enemies, but there's one that she falls in love with.
I find the story's premise rather weak. The idea that everyone has to fit into one of five accepted categories is unnatural. In society there are usually only two categories, the rulers and the ruled. Nevertheless, it's a heart-warming story about a young girl who doesn't fit in, even though she wants to.