Aya Masa suffers serious misfortune. At school, she's bullied by those who steal her grades, publicly humiliate her and treat her like little more than a rag doll. Things are hardly better with her strict mother, who keeps her sheltered. Now she's alienated and neglected, even by those who were once her friends...until she finds a crystal and someone who turns out to be a magical girl. Thanks to these incidents, Aya becomes a magical girl herself and becomes friends with the girl she saves. Despite being a target of the mysterious Anti-Magic Faction that ruthlessly hunts her down, Aya is determined to help other magical girls with various problems and give her life a new purpose.