Fushigi Doushiden Hakke no Sora

A slightly mysterious tale of Chinese supernatural phenomena! Guan Gongming, a genius fortune teller who actually existed in China during the Three Kingdoms period, and his best friend, the unrivaled playboy Ji Xuanlong, brilliantly solve a number of bizarre cases, including a mysterious phenomenon that appears in the capital and a mysterious incident that befalls the emperor! (Source: Akita Shoten, translated)