What would you think if your best friend went on a date with the King of the Dark World—because she thought he was cute?! You'd think she'd been duped—and you'd be right. The fiendish King Rogles stands poised to conquer the other worlds of the universe: the Dream World of Queen Valia, and the Human World. Rogles and his five Dark Lords have taken the force of Yang from Queen VAlia and sealed it into a Fantasm Jewel. Only a warrior with a heart perfectly balanced between Yin and Yang can wield the Sword of Valis against the encroaching darkness! Yuko, a young student from the Human World, is the chosen one—and you will control her. She is to become the greatest warrior in the universe, never suspecting that her most fearsome battle will not be against a Dark Lord, but against her closest friend from the Human World—the one she warned "Don't go out with him, he's the Dark..." But before she could finish, her friend ran off into The Darkness.