The Secret Art of Gokui

Kīshim tells them that besides Koryo Country, there is another hidden country that is parallel to Koryo known as Kiishimu Country (キィシムの国, Kīshimu no Kuni). The gate to go to the opposite world is at the river below the bridge, the same place where Sakura was possessed by Chu'nyan's mother. Kiishimu said that gate is the best because it has so many auras of hijutsu surrounded the area. When they are transported into Kiishimu Country, they realize the people of Kiishimu are being controlled by so