Keishichou Soushi: Fuutarou Meiji Gekijou

In the first years of the Meiji era, when Tokyo still named Edo, Senba Heishirou, a former policeman at the Minami-cho magistrate's office, was leading an uneventful life as the kept lover of a geisha. Until he is consulted for a murder case... (Source: Kodansha, translated)