The rules within Heian-kyō Imperial Palace meant nothing to Mash, Ritsuka, and Musashi, but for Shen Fei, one wrong move might trigger a fierce conflict between both sides. This was, after all, a singularity in the Moon World, where some things could not be handled recklessly. Since that was the case, it was better not to go and simply remain at Murasaki Shikibu's home.
"Come to think of it, Abe no Seimei is really incredible. He actually set up a barrier covering all of Heian-kyō to restrict the movements of oni."
With nothing to do at Murasaki Shikibu's home, Shen Fei browsed through the books stored there. As a famous writer of later generations, Murasaki Shikibu naturally possessed a vast collection. He had no interest in historical biographies and the like; what he read were books about Yin-Yang Arts and the Way of Yin-Yang.
There were mainly two forces in Heian-kyō: warriors and Yin-Yang Masters. Most warriors came from humble origins and were basically gathered under the Minamoto clan. Sakata Kintoki, for instance, had been born in the mountains. Only after encountering Minamoto no Yorimitsu had he joined the Minamoto clan and become one of the Four Heavenly Kings.
Yin-Yang Masters, on the other hand, were mainly found among the nobility. After all, mastering Yin-Yang Arts required knowledge and education, things ordinary people could not easily obtain. Murasaki Shikibu might have seemed like nothing more than a frail writer, but she actually knew Yin-Yang Arts as well.
It was not just Murasaki Shikibu. Sei Shōnagon was the same. It could be said that the children of nobles generally studied some Yin-Yang Arts, because this was an age when oni ran rampant. Learning to command shikigami greatly improved one's safety, much as the nobles in Tang Dynasty Twins were generally skilled