I nearly mistook this as a cosplay when I first saw this. Either I'm extremely tired, or you're just that good.
You know, it's funny how much I like this picture when Claude is my least favorite character in Kuroshituji in general (since I've watched nearly the whole anime and read all that there is of the manga). The candle is beautiful, the shading is beautiful, he is beautifully drawn. Wonderful; also, the background being a real photograph really tied it all together. Congratulations, you just unintentionally made me compliment my least favorite character (without his tap dancing skills coming into the situation at all).
This is one of the very few "serious" pictures of Claude that I've seen. I love his expression, and the reflections of light from the candle are well done. And I like the eerie feel this picture has to it. Overall amazing job, this picture is beautiful. I love your work, you are very talented.