Pretty Little Death by Lola Glass

I gave myself to the demon king I’m fated to—temporarily, of course.

Grayson Darke is as feral as he is charming, and all he wants from me is a steady meal and a sealed mate bond.
I expect our connection to be nothing more than friends with benefits, and I can accept that.
But he’s not willing to let me go.
To the rest of the city, I’m death incarnate, but to him, I’m the pretty little fae queen he’s wanted for a century.
He’s struggling to deal with the mess in his half of the city while claiming me in every possible way he can think of… and with every passing day, I’m beginning to realize that the issues separating us don’t matter to him.
He thinks I’m his.
And I’m starting to think he might be right.