Erin is not just the only out person in her grade but also the only self-proclaimed "nerd" who loves comics and all things geeky. Her best friend Liz, on the other hand, is a star athlete who excels in track and field. Despite their differences, they have been inseparable since childhood, sharing a common interest in all things pop culture.
However, things start to change as they approach the end of middle school. Liz gets accepted to a prestigious private high school, which means they won't be attending the same school anymore. Erin, on the other hand, is struggling with the fact that she is the only openly gay person in her grade, which makes her feel like an outsider.
Then comes the new girl, Sydni, a former child star who moves to their town and enrolls in their school. Erin is immediately smitten and believes that if she can ask Sydni to the big dance, she'll finally have a chance to be accepted by the popular kids. But as she starts to focus all her attention on Sydni, she realizes that she's been neglecting Liz, who's been struggling with her own issues.
Erin's Guide to Kissing Girls is a heartwarming coming-of-age story that explores the complexities of teenage relationships. It's a story about finding yourself, discovering who your true friends are, and realizing that being true to yourself is more important than trying to fit in.