Saint Seiya: Meiou Hades Juuni Kyuu Hen is part of the Saint Seiya series, which follows the Bronze Saints as they battle against Hades, the King of the Underworld. This arc focuses on their fight through the Twelve Temples of the Zodiac to protect Athena and stop Hades' plan to plunge the world into darkness. The series is known for its epic battles and rich mythology, blending Greek mythology with action-packed storytelling.