The unfortunate story of the infamous witch Medusa and her depressed son Crona. Medusa the witch with the dark evil soul who holds the vector arrow, and her son Crona the meister who controls his demon sword Ragnarok. The story of there tragic lives. The father of Crona revealed, Why Medusa became the witch of evil, Why Crona saved Medusa's life, Why Ragnarok teases Crona and more. This is all revealed in the story of Medusa and Crona.