Luna Valentine thought love was supposed to be easy, not messy, complicated, or painful. It wasn't supposed to leave you staring at your phone at 2 a.m., wondering how someone who knew you better than anyone could hurt you so easily. For as long as she can remember, it's always been her and Matthew. Their families are hopelessly intertwined, and he's in every memory she has of growing up. Falling in love felt inevitable. Until everything fell apart. When Luna catches Matthew with her best friend just two weeks after their breakup, she tells everyone she's moved on. Eventually, she almost believes it herself. But no matter how hard they try to stay apart, life keeps pulling them back together. Through late-night walks, lingering glances, and quiet conversations meant for no one else, Luna finds herself drawn back to the one person who has always understood her best. And as school pressures and fractured friendships begin to overwhelm her, Matthew becomes the only person she feels she can rely on again. But how many times can two people break each other's hearts before they let go?