hallie hart and rio deluca met when they were eleven and twelve, when hallie’s family moved next door to the delucas. they quickly became inseparable, spending their childhoods together and sharing the rooftop between their houses. hallie has always attached songs to important memories. every year, she would make rio a mixtape for his birthday, choosing songs that reminded her of moments they had shared. the tradition started with cassette tapes before eventually moving to cds. each one was marked with her signature “h” and little heart. as they grew older, their friendship slowly turned into something more. at sixteen, they fell in love, becoming each other’s first real love. but at nineteen, something happened that broke them apart, leaving both of them believing they had lost the person who mattered most. six years later, hallie moves to chicago for an interior-design internship. she thinks she can finally leave the past behind — until she discovers that rio plays hockey for the chicago raptors. worse, she unknowingly moves into the house next door to him. then she discovers that the renovation project that could secure her dream job is rio’s house. being forced to work together brings all their old feelings back, along with years of hurt and unanswered questions. but there’s something hallie doesn’t know: rio never threw away her tapes or cds. he kept every single one. from their childhood birthdays to their teenage years, every mixtape she ever made him is hidden away in a box. the cases are worn and cracked from years of being played, and rio still carries an old boombox because it’s one of the only things that can play the tapes. for six years, while everyone thought rio had moved on, he had been literally rewinding their memories. as hallie and rio slowly find their way back to each other, the