In the magical kingdom Juraihelm, Tsunami is in line to be crowed queen but must complete a test first. She must choose someone to make the world a better place. Sasami is given the task of delivering a CD from her mother's store to a spooky mansion. When she gets there she is met by Tsunami who tells her she will become a magical girl. She endows Sasami with magical powers and sends Ryo-Okhi with her as a guide. (myanimelist.net)