Kieren jumps, startled at Sirius suddenly being in his room. He's getting used to the whole apparating business, but the truth is that it still knocks him off-kilter at times, because he's used to someone knocking. Well, at least, he likes to think people will knock. He tries not to think about locked doors, the icy sensation down his back bringing him back to that moment where his parents didn't trust him.

"I live here," he points out, pencil stuck on paper. "I was just thinking of calling you," he admits. "Strange, that."