The whole thing starts with Belly’s summer trips to Cousins Beach with her mom, her mom’s best friend Susannah, and Susannah’s two sons, Conrad and Jeremiah. For years, Belly was just the awkward little sister figure, but the summer she turns sixteen, things shift. Suddenly both brothers seem to see her differently, and she’s caught between her long-time, quiet crush on moody, brooding Conrad and the easy, flirty friendship with golden-boy Jeremiah. The first book is all about that messy, sun-drenched love triangle set against the backdrop of endless beach days and pool parties.
Then the series gets heavier. Susannah’s cancer returns, and her illness hangs over the second and third books, 'It's Not Summer Without You' and 'We'll Always Have Summer'. The love triangle gets more intense and painful after Susannah dies, with Belly bouncing between the grieving brothers. She ends up engaged to Jeremiah in the third book, but a lot of unresolved feelings for Conrad come rushing back during the wedding planning. The ending is pretty divisive—Belly calls off the wedding to Jere and eventually ends up with Conrad, which some readers find satisfying and others think is a betrayal of Jeremiah’s character. The core of it isn’t just romance; it’s about growing up, grief, and how a place and a person can feel like home.