You've always preferred expressing your feelings on paper. Every crush you've ever had ended the same way: with a secret letter tucked safely into a box, never meant to be read by anyone but you. Five letters. Five impossible crushes. Five perfectly hidden secrets. Until your little sister mails every single one. Now the boys who were never supposed to know are showing up with questions, old feelings are resurfacing, and the school's most popular boy—fresh out of a breakup with your ex-best friend—has your letter in his hands. His solution? Fake dating. He needs to make his ex jealous. You need everyone else to believe you've already found your happy ending. It was supposed to be pretend. But pretending gets a lot harder when your heart forgets the difference.