'The less subtle the mark, the more closely tied the contact is.'

Well this contract was far more than closely tied.

Sebastian though, can hide the one on the back of his hand with those silky, white gloves of his.

You... Not as much.

Unless you were to wear really high clothes or fake bandages constantly, even through the hot summer.

Which was... Less than fun of an idea.

Maybe he got a kick out of seeing you struggle to cover the symbol on your chest, just below your collarbones.

But he gets more a kick when you give up, and one day he sees it out in the open, disguised as a necklace.

The sight is more pleasant than he thought, and he feels almost... proud and possessive over it? If he could.

It simply boosted his ego, that was likely it.

But he suppresses it, of course, he has a job to be done, and you should know by now nothing would stop him.

So he works on cleaning the library, at the same time as you read, being silent as a ghost while he does so.

Though he takes note of every single movement of yours, he always does.