Ryu knocks once before entering, but he doesn't wait for a response. He is functionally a member of the office, or at least he considers himself to be so. Still, no sense in being rude. "I'm here," he intones as he enters.

He comes in and takes off his jacket, hanging it on one of the hooks by the door. He notices that Akiko's shoes are gone and turns to Shotaro. "Has the Chief left?" He looks at Shotaro for confirmation.