Silence sits between the assembled like a softened drumbeat. Someone—no one visible among them—turns on an old radio left on the parapet. It plays a song that has no words but sounds like the memory of a lullaby; it gathers the rooftop’s disparate voices into a kind of unintentional choir. Then, slowly, the box on the ground begins to hum: not with electricity but with the weight of small things made important by care. People take turns setting their items down, each placing them as if performing a ritual. The harmonica is tested; the cactus is patted; Mrs. Fujimoto pours tea into small paper cups and passes them around with a conspiratorial wink.