Jondemasu jo, Azazel-san.

Have a stalker you just can't shake? Fear your spouse is being unfaithful? You might consider hiring Akutabe, a detective who summons demons to do his dirty work. While his methods might seem unorthodox, he always gets results. However, as powerful as Akutabe is, manipulating demons is delicate art. His new part-time employee Sakuma, a young college girl, doesn't get to spend too much time exploring the finer points of controlling demons before Akutabe forces her into a demonic contract with Azazel. Azazel is lazy, lustful and depraved... Everything you'd expect a demon to be. (Crunchyroll)