He didn't remain in his shifted form for long once Sirius shifted back, merely seconds really, and then he was lying against the grass with Sirius on top of him. He was full of beaming smiles though and it was just a second before his arms wrapped right back around Sirius, pulling him close to him, with a shift in his expression to a devious one. On quick roll and now he was looking down upon his Sirius.
He placed his arms on either side of Sirius, grinning, as his hair hung down in his eyes a bit, before he gave a bit of a nod to go along with his words. "Hey, you."