Saint Seiya - Saintia Shô
 

The world lives in peace. At least it was, until a shooting star appeared. It gives off an evil energy and is the sign of the reincarnation of Eris, Goddess of Discord.
The story begins when Shoko, a young student, tries by all means to meet Saori Kido, the darling of the high school that no one can approach without being invited. But Shoko is determined to question Saori, whom she suspects has information about her sister, Kyoko. She had no idea then what she was going to discover ... Because the young girl is attacked by Dryads, the slaves of Eris. A girl in armor appears and saves her from the clutches of the Dryads who wanted to make her the receptacle of Eris' soul. Shoko is then in shock, because the knight who came to his aid is none other than his sister, Kyoko. New attacks then take place and Kyoko, to save her little sister, sacrifices herself and lets Eris take possession of her body. In order to save his sister's soul, Shoko decides to become a "Saintia", a female knight swearing loyalty to the goddess Athena, and then becomes the knight Shô of the Little Horse.
The story takes place before the Galaxian Wars, the tournament organized in Tokyo by Saori Kido and his Graad foundation. During the tournament, Shoko and one of her classmates witness the fight between Seiya and Shiryu. Her meeting with Seiya, just before the clash in the ring, and the fight against the Dragon, re-motivate the young girl and push her to want to fight to the end for her dead sister.