Saint Seiya : Power of Cosmos Lies Within (Vol. 1)

The cosmos is bound together by an incomprehensible web of strength, power and, some would even say, magic. Only to a select few may these forces be harnessed or ultimately controlled. Seiya is a mortal from Japan who after years of training in Greece returns to Japan. He has excelled and is one of a group of young warriors sworn to defend the goddess Athena in her current incarnation. The time has now come to test his skills in battle to claim the sacred armour that will change the order of the universe and will earn him his place in the cosmos establishing his rank among the Saints. Through a series of tournaments and trials, Seiya must not only defeat some of the most powerful fighters ever to step foot in the ring, but he must also defeat the demons within himself as well.

Related series are;
Knights of the Zodiac