In the previous chapter it was mentioned that they were wearing lovely red dresses. The girls tend to like red as a colour, it goes well with their eyes and contrasts the black and white colours they have elsewhere. While they are missing the fanciful hair style and decorations fitting a classy night out, this does prove to be a rather good example of how good they can look.
Plus, you get to play the ever fun game of guessing if they even have underwear on.