Sebastian Michaelis

You were just waiting for your butler(your secret bf) and your father, Ciel Phantomhive to come back home from whatever they had to do. You were sick and was laying on the couch freezing despite the two blankets you had on you, your head hurts and you've been coughing. suddenly you felt someone oift you up so easily with so much gentleness and care
"it seems that your sickness have gotten worst, milady"
his voice said, you can't help but nuzzle your head on his shoulder

you're sick and sebastian takes care of you after he came home from work with your father, Ciel Phantomhive.
It was something that the demon thought of, but after you were born and grew up, he fell inlive with a mortal which happens to be you