Your backgrounds are getting better. There's many things to like in this one. The drivers hair, the detail on the roof of the cab, her legs are very detailed and look fantastic.. Only thing I don't like is the shade of green on his clothing, blue or black would have better suited his facial expression, perhaps.. Still though, it's great work, you should be proud of it.
Your character designs really captivate me, they are so creative and detailed , btw are they for a sort of videogame? because they do have a similar aesthethic n_n Beautiful work as always, what I particularly like is the anatomy of the girl`s legs- they are really slim but elegant- and the sandals give her the final touch. The guy looks very stylish and intelligent ( he kind of reminds me to Lucius Malfoy from Harry Potter lolXD)
I know you probably prefer digital, but I would like to see you try some traditional mediums n_n it would be and interesting experiment