Balance.  Yin.  Yang.  Light.  Darkness.  Good.  Evil.  Only by maintaining balance can one attain the pinnacle of power!  Join Kuro as he journeys the world to become strong and enact his vengeance.  Together with the other world heroes, Kuro gets entangled with the forces of Light and Darkness in his journey to become the Yin Yang Saint of Athena. Vampires vs. Vampire Hunters.  Saints vs. the forces of Hades.  Heroes vs. Demons and Demon Kings.  In this mixed world of Saint Seiya, Saint Seiya Omega, Saint Seiya The Lost Canvass, Saint Seiya the Next Dimension, Castlevania Aria of Sorrow (AOS) and Dawn of Sorrow (DOS), Castlevania: Symphony of the Night, Castlevania: Curse of Darkness, Castlevania: Rondo of Blood and Dragon Quest Dai no Daiboken (Great Adventures of Dai), Heroes and Villains, Saints, Gods, Goddesses, Demons, Heroes and Demon Kings are all involved in a struggle for survival and supremacy.