Member of the school’s gay-straight alliance. Joni Mitchell superfan. Seventeen-year-old who has never been kissed. So when last summer’s crush and her former classmate—Young Lungs lead singer Sebastian Delacroix—comes back to town with his new hit single “Natalie,” she can’t bring herself to believe it could possibly be about her…could it?As Nattie sorts through the evidence (the lyrics, Sebastian’s elusive text messages, and their brief romantic encounter last year), the song’s popularity skyrockets, and everyone starts speculating about “Natalie’s” identity. If that wasn’t mortifying enough, Nattie runs into another problem: her confusing, flirtation-packed feelings for her good friend Zach. With her once-average life upended, Nattie is determined to figure out once and for all if her short-lived past with Sebastian was something love songs are made of—or just a one-hit wonder.

    When Milo's doctor suggests asking his biological father to undergo genetic testing to shed some light on Milo's extreme allergies, he realizes this is a golden opportunity to find the man he's always wondered about. Hollis's mom Leigh hasn't been the same since her other mom, Pam, passed away seven years ago. But suddenly, Leigh seems happy—giddy, even—by the thought of reconnecting with Hollis's half-brother Milo. Hollis and Milo were conceived using the same sperm donor. They met once, years ago, before Pam died. Now Milo has reached out to Hollis to help him find their donor. Along the way, they locate three other donor siblings, and they discover the true meaning of the other F-word: family.