Satisfying an Endless Greed

She wished for nothing more than for his authority to be hers. However, the Witch of Greed's plan begins to deviate from its' original course. Could he be more than a tool for her interest? Could he be more than his authority? Perhaps, that boy, Natsuki Subaru, was someone Echidna was not even aware she was waiting for...one able to satisfy her unending greed. (Smut)