Nightmares...

AU: Modern, Sebastian is the demon living under Ciel's bed.

I've made peace with the monster under my bed. They were here to hold my hand, the night you left.

Sixteen year old Ciel Phantomhive is a strange, sickly boy. On top of having an asthmatic body that easily gets sick, his mind is inhibited by his severe Peter Pan syndrome. Because of his mental regression, his parents don't believe him when he informs them of the monster under his bed.

Peter Pan Syndrome describes one's inability to believe they are of an older age and/or to engage in behaviour usually associated with adulthood.
-Wikipedia

Prompt created by @dawnlightsilhouette on Tumblr.

The title is Latin for "Sweet Dreams".