[What a sorry, humiliating period of one's life these last years have turned out to be, when at this point, one recognises a fever for what it is within the first half hour.
How pathetic isn't it to have ample personal experience with how bad these ridiculous illness spells tend to get? To know perfectly well that it's just as well to go lie down right away, because that's how this day is likely to end anyway? Utterly pathetic, that's what it is.
Sebastian's annoyance over not being 100% invincible at all times aside, there's still today's schedule which won't complete itself, regardless of how good an idea it would be for him to take the day off. So of course, despite knowing better, he's not taking the day off. He prepares Ciel's breakfast as always, making a private resolution not to cough in his master's presence...
If anyone visits the bakery today they'll perhaps notice that he seems to work with a decidedly more pronounced efficiency (yes, even by Sebastian standards) than normal. If he gets all his chores done quickly enough and opts for the more low-effort, quick pastries today, surely he can win the race against the progression of this cold. Because that's how self-care works.]