Secret of The Ten-ryū Ruins - S1.E11

The Chi-ryuu learns that Chihaya has disappeared from his post at the Taihaku shrine. So, Mikazuchi sends Izou and two rookie Chi-ryuu Toujinshi, Shinonome (Shikigami - Hanmou no Ninkurou) and Kasumi (Shikigami - Mebuki no Fuurai), to Kyoto to investigate. Yuuma also comes to Kyoto for his own reasons. Teru finds his way to the Taihaku shrine, and shortly after, he starts his training. He also takes a liking to Nazuna-chan. It's not long until Izou, Shinonome, and Kasumi make it to the Taihaku shrine and fight with Riku, Nazuna, and Teru in a huge battle royale. As the fight goes on, Izou grows desperate and becomes willing to take out on of his own teammates in order to win.