Bailong was originally in charge of a river god named "Amber River". Its original shape is a dragon, and its appearance can become a teenager of about twelve years old. Because the river he was in charge of was filled in when the building was built, he went to the oil mill, became a disciple of Tang, and changed his name to "Bailong" and became the manager of the oil mill.

He had contact with the young Chihiro, so when he met Chihiro who had strayed into the spiritual world, he immediately knew it was the other side. During Chihiro's stay in the oil company, he gave a lot of help in private, which was also the greatest help to Chihiro. Finally, reminding her of her real name, after coming out of the oil mill, she decided to discuss with Tang not to be her apprentice.

Nigihayami Kohakunushi is the river god of Amber River, a white dragon; Nigihayami Kohakunushi has nowhere to go, because the Amber River was buried by human beings. In order to learn magic, Nigihayami Kohakunushi came to the world of gods and became a disciple of Tang. At the same time, Tang snatched his name and changed it to another name. In addition, there is a bug designed by Tang to manipulate it.

Later, Chihiro accidentally arrived at the back of the soup house, and Bailong kept telling her to remember her name, because if she forgot her name, she would never leave the soup house. With the help of Bailong, Qian found a way to return to the original world, but Bailong was seriously injured because of her.

Later, I found money to save Bailong, hoping that money would forgive Bailong for what he had done before. After this series of things, Chihiro remembered an experience with Bailong. It turned out that when Chihiro was young, she fell into the water to pick up a shoe. At that time, the person who saved her was Nigihayami Kohakunushi, the owner of the Amber River, now the White Dragon.