Harry was looking for Ginny's perfect present. He knew that he shouldn't surprise her with a house this time. Jewelry was always nice. He was walking around the cases, trying to decide what James wouldn't break if he tugged on it. Reflected in the glass he saw a familiar pale profile. Harry's head snapped up and he looked behind him to see Draco looking in the window.
Harry had an ingrained reaction to seeing Draco. His pulse sped up. His adrenaline started pumping, ready for confrontation. Sure, Harry had testified that Draco hadn't been able to kill Dumbledore. He testified that Narcissa had saved his life. He still loathed the guy.