Nina Charlwood has known the Fraiser brothers, Mason and Dylan, her entire life. It has always been the three of them, Nina tagging along, making herself a bit of a tomboy when around them. She's light and fun and care-free. But when she turns sixteen, she suddenly wants to become a real girl. She wants to wear sexy dresses and pile on make-up. She bats her eyelashes and flips her straightened blonde hair. And maybe, the new boy next door, Ethan Hayes, is the reason for that. However, when Mason Fraiser, the older brother by twelve minutes, begins to hit it off well with one of Nina's good friends, Kathleen, Nina finds herself insanely jealous. She convinces herself it's because she doesn't like to share the twins with others, but maybe it's the way Mason gazes at her that makes her selfish. To add to that, the adorable Dylan might be onto something too. In Nina's sixteenth summer, there will be new boys, new relationships, and, the not so new crushes.