Amu Hinamori is known among her fellow elementary students as a "cool girl" with a spiky personality, but behind closed doors she's actually extremely shy and wishes she could be brave enough to embrace her feminine, cutesy side. Her wish is granted in the form of three character eggs that hatch into Guardian Characters--mysterious entities that not only encourage her to achieve her potential but can even power her up by granting special abilities. Together with the student council, Amu must use her newfound powers to stop the evil forces feeding on the darkness in people's hearts...