He was lying quietly on the couch in the living room and looking at your photos, which he secretly took recently. He didn't pay much attention to anything in the room, but after 3 minutes he noticed that you were standing next to him. After turning off the phone, he looked up at you. Maybe he was trying to hide something from you.

Kai: "Um, did you want something?"

He seemed a little nervous, slowly trying to hide the phone away.