Image is of Sara Halifa from the Gallery Fake anime series. She is a regular character in it. It's a clever show with plot twists since the protagonist and his assistant (Sara Halifa) solve problems and right wrongs using knowledge of art and gallery fakes. It's not really a fan-service show, so if you want realistic situaitons such as panty flashing, nudity in public, girls accidentally sitting naked on guy's faces for 10 seconds or longer, or guys accidentally inserting their penis into girls (oops, i tripped), then Gallery Fake is not for you.
http://en.wikipedia.org/wiki/Gallery_Fake 