Onmyou Taisenki

Riku Tachibana seems to be an ordinary middle school student with the worries of what club to join. His unique feature is that he makes odd hand gestures, and he does not know what they really are. His childhood friend Momo-chan goes through the first of many denials of liking Riku as more than just a friend. Riku decides to ask his grandfather what the gestures mean, and soon after, he finds himself making a contract with the Shikigami, Byakko no Kogenta.

The news of Yamase's disappearance has reached Chi-ryuu Toujinshi Ujiyama and Yuuma Asuka, who has just defeated a Toujinshi of the Ten-ryuu with his powerful Shikigami, Byakko no Rangetsu. Much to Ujiyama's dismay, he is told by Yuuma to investigate Yamase's leads on the Head of the Ten-ryuu. Meanwhile, as his grandpa rests in the hospital, Riku searches for clues on some old documents found in his grandpa's bedroom. However, it is not long till Ujiyama and his Shikigami, Oobi no Mumyou, confront Riku and Kogenta.

Following a lead from his grandpa's notes, Riku goes to Ooiwasai to search for some more In. Soon after, he is attacked by Misasa, a Chi-ryuu Toujinshi, and her Shikigami, Kanro no Komaki.

Following a lead from their new friend, Masaomi, Riku and Kogenta go to the mountain region of Myoureizan in search of the In for "Saikaidou Kotetsu." Along the way, Riku meets a Toujinshi of the Ten-ryuu, Teru. Because he doesn't want to get Riku involved, Teru goes off by himself. Soon after, Riku and Kogenta fight against two Chi-ryuu Toujinshi, Hazan (Shikigami - Enoki no Otochika) and Dougen (Shikigami - Tsubaki no Gorouza). Teru joins in the battle with his Shikigami, Akagane no Isoroku. Also, Riku finds out the identity of Kogenta's "partner.

One night, Masaomi explains to Riku about what Toujinshi and Shikigami are, and why the Ten-ryuu and the Chi-ryuu are currently fighting. It seems that the Chi-ryuu is interested in opening the Fukumaden Kimon, a gate that leads to demons and a power that could destroy the world, and the Ten-ryuu are trying to keep the Fukumaden Kimon closed. Masaomi also says that when Toujinshi lose their Shikigami, the Toujinshi lose their memories. Later, when Riku decides to clean up the damaged shrine, Yuuma confronts him, asking him about the Head of the Ten-ryuu. Then, his little brother, Souma, sick of Yuuma being on Mikazuchi's side, steps in and attempts to fight with him. However, Yuuma and Rangetsu end up fighting against Masaomi and his Shikigami, Seiryuu no Kibachiyo.

Kogenta really wants Riku to start training, but Riku doesn't know how to go about it. Then, thanks to some of Rina's books, Riku gets some information on a special area for training. So, he, Rina, and Momo find a training area for using Toujinfu (cards for Toujin seals). Before the training could actually begin, Riku and Kogenta must fight against another Earth Style Toujinshi, Gonpachi, and his Shikigami, Souka no Raiden. The battle gets tough when Riku and Kogenta have to deal with Gonpachi and Raiden and also have to protect Momo and Rina from the demons that reside in the training area.