Sirius grinned back up at Remus when he abruptly found himself on his back on the forest floor. He shifted a bit, because this was a more familiar game -- something that harkened more cleanly back to their days at Hogwarts, and Sirius was hardly about to let Remus win.
"What are you doing, old man?" Sirius teased, pushing up at Remus' shoulder with one hand before hooking a knee around Remus' to send them toppling once more across the forest floor.
It was so much better this time. And that was a relief. It had been hard when he had first entered the compound, because he'd been so angry, held so much rage and hatred. And then Remus had left, and Sirius had gotten along with the younger version of him, but there had been a lot to explain, a gap left between them where they weren't certain of who they were versus what they would be. But this Moony -- he already knew him. Already knew every fucked up little nuance of his brain, and there was no need to go through the worrying and explaining. They could get back to just being them.