He had been in the light, and he had fallen into hell, he had been high, and he had had nothing. He carries all the darkness and sin on his back and walks alone on the cobwebs of the abyss. He yearns for the light, but only darkness walks with him.
CP is Bo Jiang and Ciel. In this book, Bo Jiang's real name is Thain, which means the blue of the sky in Ciel, and Thain means the blue of the sea.