Laura is sent to the Hanover girls boarding school by her parents after she does something that we don't learn about until almost the end of the book. She is assigned to room with Charli, an out lesbian soccer player who's been at the school for many years and has never had a girlfriend. For the first half of the book, the alternating first person POV chapters describe their growing mutual attraction, which is acted upon right after the half-way mark in this very long book. The first half is engaging because Laura is troubled, self-hating and slow to trust, while Charli is naive and fearful. Once things heat up, the book sacrifices the movement of plot in the second half with long sex scenes and the minutia of the main characters' interactions as they fold into themselves as a couple. Although the tension in the story comes from Laura's former best friend and love interest, Vic, another angry, troubled teen, and Charli's former best friend, Lindsay, there are many instances where I thought things were going to blow up between Laura and Charli, but they were always resolved.
This is a high angst book and I'm predicting a second novel for these two since there's quite a bit left unresolved (even with the HFN ending). An interaction between Charli and Lindsay toward the end made me think that a second book could center around damage that Lindsay could do with the info she received in that interaction.
I'm rounding down from a 3.5 to a 3 given my critique of the book's second half.