Everyone at Seiyo Elementary thinks Hinamori Amu is the coolest girl in class. But, she's nothing like that. Amu's actually a very shy girl who wishes to have courage to truly be herself. One morning, she found three mysterious, little eggs in her bed. Each egg contains a "Guardian Character". These guardians are angel-like beings that can give a human a certain power to change their abilities. With help help from these Guardian Characters, Amu will discover that her true self is even more amazing than she ever dreamed.