Yakumo is attacked by Shoukaku, a Toujinshi of the Jin-ryuu, and his Shikigami, Oobi no Yatarou. Yakumo fends off the attackers and discovers what the Jin-ryuu are planning. Masaomi gives Riku information about the Chi-ryuu's 4 Kimon. While on their way to one of those 4 Kimon, Riku, Souma, and Nazuna meet an kind-hearted, inexperienced Chi-ryuu Toujinshi named Subaru and his Shikigami, Tsubaki no Houshun. When Riku and the gang befriend Subaru, Houshun is destroyed by the Ten-ryuu Suppression Department Chief of the Chi-ryuu, Taizan, and his Shikigami, Souka no Onishiba.