Summoned, The Prologue.

"Let's get one thing straight, demon." Ciel shuffles the paperwork on his desk into a pile that looks at least somewhat neat. He finally sits down, facing Sebastian with that two-toned gaze, courtesy of him. His eyes are smug, but his face shows nothing more than impudent coldness. "I only summoned you for the power it would bring me. Now leave me alone."