[And Ciel, being as contrary as he is, allows it this time. Maybe the fact that he looks like a coal-miner after a fifteen hour shift is convincing him to just...temporarily let it go.
Sebastian can brush at the soot all he wants, some of those burnt fringes are there to stay. And speaking of burnt fringes, that's definitely a teensy corner of an eyebrow missing. He allows Sebastian to fuss in his usual butler fashion for a short time before sighing and sending up a small cloud of soot. And oh hey! He can hear himself huff and puff now.]
This day has been a disaster from the start. [And an embarrassing demonstration of his ability to survive without Sebastian. How abhorrent.] I want to be clean. And I'm starving. [Super long time since his last meal. At this rate, he'll waste away and be nothing but a set of twigs put together. "Do something about it," would normally be his finishing line, but well.]
Get back in bed, Sebastian. I'll see about cleaning myself up in my quarters and... [Commit some commandeering at the bakery?]