At last, Noa has overcome the trials of his five sisters and secured the right to live as an adventurer. He accepts a job request for his rank advancement exam to defeat a golden dragon, but when he reaches the dragon town of Jiang, he discovers his client is none other than his fourth sister, Ciel!

He heads to the valley of dragons with Ciel to find the golden dragon, but instead they discover that a huge number of dragons have gathered. When he receives further information about a potential ceremony to revive the Dragon King, which would bring ruin to the land, he has to hurry to stop the rebirth!