Sai knocked on the door when he arrived, looking tired but ready to get down to business. Shikamaru would probably know it was him before he said anything, but a greeting was only polite.

"Shikamaru-san. It's Sai."

He hadn't needed to walk past Usopp's room, or rather his old room, thankfully. That made coming down this hallway that much easier. He wouldn't look to the right, wouldn't focus on anything but the task at hand.