In Gusinakhon, there was a king named Gosutum. He had three sons: the eldest was named Gomes, the second Gomon and the youngest brother, which was powerful because he was born with a special item with him, was Gomin.

The little prince, with only 12 years old, had dexterity and individuality with magic weapons causing Gomin to not be afraid of anyone. One day, Gomin and his friend Musa went to the beach and met with the son of Kato Naga, the royal city of the underworld, and Gomin killed him.