If original artwork from your own imagination (which I'm assuming it is), this is extremely spiffy, wonderful, and lovely. :D They're both so lovely~!

Gods, I love this picture. Their faces look amazing, and your shadowing is great! I say, don't color it in! I've ruined many pictures by doing that, so I don't suggest it, plus this picture looks absolutely wonderful the way it is! The art looks a lot like Ranma 1/2, was that intentional? Even if it wasn't I still love it^^b ~Catie-brie ~Que Sera Sera

This looks great, I like the faces...dunno why but I do! I bet if you colored it it'd look fantastic just as it does as a sketch! ~Tijiya

i like the faces, too. it's not awkward looking, like a lot of fanart faces. overall, a simple sketch, but i like it.