[Wei Wuxian gives Lan Wangji a confused look. He reaches up to try and put his hand on the other's forehead to see if he has a fever. He does have to go up on his toes slightly to reach the taller man's head but that's just how it has always been.]

I don't know what this mask is that you are talking about..Mo Xuanyu liked to wear make up but there was never a mask. Are you feeling okay?

[But then he pauses as he looks into Lan Wangji's eyes. Something is definitely different and it's not just a trick of the hotel. His eyes widen very slightly as that confused expression deepens.]