[His expression changes from one of weary boredom to irritation, and his frown becomes more pronounced.]

Are you say that you aren't willing to accept what I've said? I'm afraid there is no other explanation, though I can certainly make up a ridiculous story, if that will satisfy you.

[Only a demon contract. But, a small smile does tug at the corners of his mouth as he answers.]

A contract of employment, of course.