Mao and his companions are attacked by their senior disciple, Hyakka, who wields fire magic. Hyakka dies once but immediately comes back to life. Hyakka has also been alive for 900 years. According to Hyakka, 900 years ago, five disciples were summoned to the "Goshikido" by their master.

Mao sets a trap to lure out the shikigami user by making the attacking shikigami drink a talisman. Suddenly, a giant made of fish and water appears. The giant demands that Mao teach him the ultimate secret technique of Onmyodo, "Taizan Fukun," which allows him to manipulate people's lifespans.