Black, white, and purple. This is a surreal and striking picture. The shading you've used works well, and there's a distinct contrast between the white of Tsuzuki's clothes and the black background. The detail of his eyes is good; a fine image in the darkness. His hair is done well, excellently detailed. By this it's clear you referenced from the manga, rather then the anime. One point is that his expression seems rather calm rather then shocked, but overall this is a great picture. Love it.