For years, Ruby Selwyn and Draco Malfoy have been inseparable. Their families, however, have never been. The Selwyns and the Malfoys have spent generations locked in a quiet war of bloodlines, alliances, reputation, and old grudges. Yet somehow, their children became best friends before either of them were old enough to understand what their families expected them to hate. At Hogwarts, that friendship has always been their one secret rebellion. Until the war begins to change everything. As the Dark Lord rises again, Draco is pulled deeper into his family’s world of expectations, while Ruby is forced to confront the terrifying truth about her own family. Suddenly, the boy who used to sneak into her dormitory after curfew is being ordered to stay away from her. And Ruby refuses to let him. Their friendship fractures into arguments, betrayals, jealousy, and an attraction neither of them is willing to acknowledge. Draco becomes colder. Ruby becomes vicious. Every conversation turns into a fight, every fight lasts a little too long, and every moment they spend apart somehow hurts worse. What neither of them realizes is that Draco fell first. And he fell much harder. But with their families on opposite sides, the war closing in around them, and Hogwarts becoming less of a school and more of a battlefield, loving each other might be the one thing neither of them can afford. Between forbidden corridors, freezing nights on the Astronomy Tower, Christmases that no longer feel like home, and a group of friends slowly becoming their found family, Ruby and Draco are forced to decide: Do they become exactly what their families raised them to be? Or do they burn the entire legacy down together? Because sometimes your greatest enemy is the person who knows you better than anyone. And sometimes your childhood best friend is the one person you were never supposed to fall in love with.