The main blemish in her life is that her parents are divorced. Not one to take things lying down, she's determined to make prom into a perfectly romantic event so her parents get back together, bonding over pre-prom rituals (I found this reasoning a little weak, but not a deal breaker - it's clear that she's having trouble accepting that they're not getting back together and is being a little irrational about it). In the meantime, her father is engaged to a professional cheerleader, who Pez gets to know over the course of the book. Their relationship was a surprisingly strong point of the story.
Mostly though, the story is a romance. Pez is forced to interact with the jocks her father coaches. She finds one of them attractive, but she recognizes that he's promiscuous and isn't generally into jocks, so doesn't act on it. Over the course of the story, they get to know each other better and develop a relationship (although not a romantic one for at first). The romance is understated. There is some tension before they act on their attraction, and there are difficulties they overcome when they start having a relationship, but the author doesn't unnecessarily draw out the problems, and Pez doesn't spend all her time wallowing in thoughts about the relationship - she's got things to do! For all that, when they do come together, it's intense and passionate considering that they only kiss (it is YA, after all).
I love that the author avoids the standard YA tropes and tendencies. There's no love triangle, insta-love, or angst. The girl doesn't feel unworthy of attention and she doesn't need - or get - a makeover. She's popular and good at school without being a genius or a goddess. The boy has no impulse control issues and wasn't her best friend from when they were kids. Nobody is abused or bullied. Mind you, I've loved stories that had all of these things, but it's refreshing to see YA romance that doesn't use any of them.
The only thing keeping me from rating it a five star instead of a four is that the climax isn't so climatic for me. When they run into relationship problems, there's some time when I'm sure Pez is hurting, but it really takes place off stage. So we go from conflict to resolution without tearing my heart out too much in between. Perversely, I would have liked my heart torn out just a tiny bit more. Other than that, though, I thought it was great. Highly recommended if you like YA romances.