In ancient times, the Titan Cronus (son of Uranus the sky and Gaia the earth) and his wife Rhea gave birth to six children. Five of them were swallowed by Cronus, and only one was saved, Zeus, hidden from Cronus by Rhea. Upon reaching adulthood, Zeus forced his father to vomit the other five gods. Zeus, along with his brothers and sisters, decided to battle the Titans for control of the universe. Cronus and the other eleven Titans lost the battle and were sent to Tartarus.

Thousands of years later, in Greece, the Pope visited the room of the recently reincarnated infant Athena, with a golden dagger.

Before he can kill her, the Gold Saint Sagittarius Aiolos saved her, and unmasked the Pope. Aiolos, horrified, fled. The Pope then declared him a traitor to the Sanctuary, and had Capricorn Shura murder him.

This caused his younger brother, Leo Aiolia, to grow under the shadow of his "traitor" brother, suffering from all manner of abuse and scorn.

It left him with a grudge against the Gold Saints and Sanctuary as a whole, which caused the Pope and most of the Sanctuary to distrust him.

To make things worse, the enemies of Zeus, the Titans, were revived and began to seek vengeance against him and the Sanctuary. This marked the start of Aiola's story and the battle of the Gold Saints against the Titans.

Episode G is set 7 years before the events at the beginning of the original Saint Seiya Manga, and 6 years after the death of the Gold Saint Sagittarius Aiolos.

Gau Ban is a boy who is struggling to become a "Sevalle," the strongest class of warrior in the mercenary kingdom of Kuruda. Gau's elder sister, Elle Ragu, is the 59th "Sevalle" and holds the honorable title of "Shadow Skill." The story develops around the two siblings, as they fight magical monsters and historical warriors. The major part of it is a battle called "Shadow Skills" that is fought with only the hands and feet. It begins when the historical warriors chant the words "We are invincible!" and obtain superhuman powers.

Originally published as four volumes by Takeshobo and Kadokawa but was not complete until 1998 in the final serialization in Dragon Junior which was released in tankoubon in 1999 by Kodansha as Volume 5 "Shadow Skill Phantom of Shade." Kodansha resumed the series in 2001 in Afternoon.

Note: For example, the current volume 8, is basically the volume 13 of the series. The series began again from number 1 (but the story is still continued)