He may not have had super-hearing anymore, but Alastair was still paying close attention to the comings and goings of his roommates. Kiryu's mad dash did not escape him, though he was far too late to call out or stop him, by the time he got to his feet and chased after. Alastair didn't need to hesitate, he ran back for his boots and keys and in under a minute was on his bike, following Kiryu to see what he was up to in such a hurry.