When Kyle and Lorraine are sixteen, their parents jokingly announce that one day they'll get married. Unfortunately, nobody is actually joking. Both families are extremely close. They've built businesses together, vacation together, celebrate holidays together, and fully expect Kyle and Lorraine to continue the tradition. The problem? The two teenagers can't stand each other. Kyle is impulsive. Lorraine is meticulous. Kyle lives in the moment. Lorraine has her entire life planned out in spreadsheets. For years, they keep trying to prove everyone wrong. Yet somehow, every milestone in life keeps bringing them back to each other. Graduation. College applications. Heartbreaks. Career struggles. Family tragedies. Until one day, they realize they've spent almost all their years together becoming each other's favorite person.

One impulsive kiss. One unexpected man. One love story neither of them saw coming. After catching her boyfriend cheating, Claire Marie Sarniento swore she'd never let another man break her heart again. So when she comes face-to-face with her ex at their college reunion, she does the only thing she can think of. She kisses the handsome stranger standing beside her. Unfortunately, that stranger turns out to be Harris Manuel Bautista-an accomplished lawyer, a former schoolmate, and a man who suddenly seems determined to stay in her life. From pretending to be her boyfriend to becoming the person she can't stop thinking about, Harris slowly breaks down the walls Claire worked so hard to build. But just when she's ready to believe in forever again, the ghosts of Harris's past come knocking on their door. Can Claire learn to trust the man she loves? Or will fear, jealousy, and old wounds destroy the future they both dream of?