[ It's highly likely Kun does have the medicine Rosen needs, but who knows if it'll actually work. Regardless, he's waving a hand at the threat. ]

Please don't, I'm a Medicine Seller, not a proper doctor.

[ The jury is out if Kun knows he's joking, but the genuine smile on his lips implies he does. At Rosen's question however, his expression turns thoughtful. ]

I'm just used to it I suppose. I remember when my mentor first let me carry his box. I'm a bit more energetic than he is and I'd run everywhere, I guess he hoped the weight would get me to slow down. It took me about a week of adjusting to the weight and soon I was right back to running.