Tokyo Babylon, Volume 1 (Tokyo Babylon #0-1.5)

Tokyo - a beautiful yet cold city, full of life and twinkling lights. There resides Subaru Sumeragi, the thirteenth head of his clan and a powerful onmyouji. Aided by his glamorous twin sister, Hokuto, and the veterinarian who claims to love him, Seishirou Sakurazuka, he solves the supernatural troubles that plague the citizens of Tokyo - both living and deceased!