Daito Fuunki Rakuyou no Shoujo

is the first volume of the Daito Fuunki light novel series, written by Tosei Tamura and Illustrated by Minoru Togi. It was released under the Dengeki Bunko Imprint in February 2002.

Synopsis
The time is 755 AD. China is the Tang dynasty. An Lushan, who was the head of the Northern Frontier Defense Force, launched a rebel soldier, and in a blink of an eye Tang fell into the second city, Luoyang. Around this time, a mysterious photosphere appears in the capital Chang'an. At the request of people who were afraid that a youkai had appeared, the old master Ouyo and his disciple's children were to search for the identity of the photosphere. It was the only empress Wu Zetian in Chinese history who should have collapsed 50 years ago, who appeared in front of them who used a mysterious technique called Fangshi !? With the motif of Chinese historical facts A time trip adventure with unique characters. Winner of the 8th Dengeki Novel Prize Grand Prize.

(source: Amazon JP - Translated)