If he was annoyed, he did not show it. And he was, a little, grudgingly so because he understood it was her job to ask and that he also had a more complicated feeling towards her than he initially thought -- he had to allow her into his inner emotional sanctum for a little bit, if only to let her probe and get a sense of his symptoms. He wouldn't admit weakness to just anyone, after all. "Progression was slow. I started feeling more aches about two days after the fact. Congestion. A cough. It developed quite normally, I would think." It was only a cold, an annoying one, perhaps a sinus infection; those were his guesses. "I took Nyquil to help me sleep. That is all."
He was becoming increasingly agitated being in such close quarters with Ai. Nobu tried to remember when he would do anything to be close to her. This strongly reminded him of when they had first met: how she had annoyed him beyond anything and then slowly won him over with her forthright nature. Her unfailing ability to not give up. Her happiness. In contrast with his stoic nature, she seemed a regular beam of sunshine. Perhaps she had done the right in leaving, he thought suddenly, looking at her. He would have never made her happy. She hadn't been happy. That was why she had left, wasn't it?
"Also, I feel significant pressure in my sinuses around my nose and below my eyes," he said after a moment, supplying her with more information. "An ache as well, I suppose."