[caught off guard by Illya's rather energetic response, Keiwa stiffens slightly- And accidentally sets off another coughing fit. He sounds a little more hoarse than he usually does, but he's nodding in agreement with her]

Yeah... [there's a faint smile from under his mask... Even though he's fairly sure this was just a regular cold and not a Disturbance causing illness] Luckily, Illya-chan is looking out for me. But I promise I'll be careful.

[and along those lines...]

I might need to call a ride after visiting the doctor though...