The carefree Tsunami is next in line to rule over the Magical Kingdom of Juraihelm. But before she is officially crowned as queen, she must restore balance to the universe that has come to favor darkness. To accomplish her goal, Tsunami gives the ordinary Sasami Kawai a magical baton that can transform her into a magical girl. She also appoints the rabbit-like creature Ryou-Ouki to aid Sasami in the battle against evil.