Saint Seiya: The Lost Canvas - Meiō Shinwa

In Greek mythology, Athena, the daughter of Zeus, was born in full armor. By birthright the goddess of battle, she did not believe in conquest, and only fought defensive wars. Her battles with bloodthirsty gods and giants shook the very earth and seemed to last forever. On the battlefield, there were a group of youths that always surrounded and protected the goddess: the Knights of Athena! Flash forward to modern-day Greece: two Japanese tourists are shocked to see a mansized meteorite crash to the earth before them. It turns out to be young Seiya. Seiya must train harder than ever if he is to survive his match with the brutal Cassios! Whoever wins will receive the greatest prize known to man: the incredibly powerful Pegasus Cloth! 

(Source: VIZ Media) 

*Note: **\- Includes two extra chapters ("SHAKA" and “The Cygnus Story - Natassia of the Land of Ice”).
\- Other editions merge chapters into a total of 110 chapters.***

A series of side stories focusing each of the Gold Saints from Saint Seiya: The Lost Canvas exploring their lives, mostly events which occurred before. 

*Note: The chapter count includes 89 regular chapters and 12 "Extra Track" chapters.*

Extra chapters expanding the story of Saint Seiya: The Lost Canvas.

In 1990 (previously 1986), in Elysion; the five Bronze Saints Seiya, Hyōga, Shun, Shiryū and Ikki, having wreaked havoc in the Underworld's army and succeeding in resurrecting the God Cloths, engage the god Hades in a final duel to the death.
During the battle, Hades remembers that he has seen Seiya's face before and comes to the conclusion that he faced him before. He thus starts reminiscing about his previous host body, and the story starts 247 years prior, in the 18th century.
The protagonist, the Pegasus Saint of this era, is an orphan who is best friends with a boy named Alone, the host of Hades. Former Bronze Saints Dohko and Sion, two prominent characters in Kurumada's original manga as the sole survivors of the holy war of that century, have just been promoted to Gold Saints and eventually the two duos meet. 

*Note: Includes three extra chapters.*