It was a new development, this strange awareness, and a rather unwelcome one. Ever since Remus had reached out and gripped his shoulder, Sirius kept getting distracted by the smallest movements—he’d find his eyes following Remus’s fingers as he adjusted his tie, or realize he was staring if Remus reached over and began to fiddle absentmindedly with the sleeve of his robes. When Remus sat down next to him on the train, their knees had knocked together, and Sirius had only realized a few seconds later that he was holding his breath