Eden takes Aria away, and Aquila Yuna and Pegasus Kōga resume their journey, demoralized by their failure to protect their friend. Along the way, Yuna and Kōga separate, meanwhile Eden and Aria reminisce about the happy days they shared during their childhood. Kōga later meets a young man who first mocks his weakness, luring the teen Saint into a fight. Kōga later realizes the man to be the owner of an immense Cosmo, and turns out to be Cygnus Hyōga, one of the legendary Saints who protected Earth from great menaces many years ago. Hyōga manages to teach Kōga that to reach the true potential of his Cosmo, he must first believe in himself. After learning Hyōga's lesson, Kōga rejoins Yuna and both resume their way with renewed resolve.
An anime-original spin-off/sequel based on the Saint Seiya series: The god of war and guardian of his namesake planet, Mars, was once sealed away by Seiya, but time has passed and his revival is at hand. Meanwhile, Saori Kido is raising the boy Kouga, whose life Seiya saved, and he's been training every day to become a Saint in order to prepare for the coming crisis. Unaware of his destiny, when Kouga awakens to the power of his Cosmo hidden inside him, the curtain will rise upon the legend of a new Saint.
