Sugar and spice, and everything nice--that may be what girls are made of, but Amu Hinamori is so much cooler, especially now that she's left behind her days at Seiyo Elementary and become a middle schooler! After transferring to Arcana Academy on a special assignment, her role as the Joker Guardian is to intervene in a crisis that is causing students to lose hope and confidence in themselves. But she has another, more important secret mission: to solve the mystery of the all-powerful, mysterious Arcana Jewels.