在遥远的地方,有一个洋溢着各式各样的童话故事、可爱和快乐的国家“童话国度”(Märchen Land)。然而,恶之皇帝皮耶罗(Piero)把“童话国度”的女王彻底封印。精灵糖糖(Candy)随即前往地球,寻找传说中的战士“光之美少女”。 转学生星空幸接获一本从天而降的绘本,里头的精灵糖糖竟然实体化。直到下课时,她被扯入异次元世界,只见皮耶罗和糖糖正在对峙。幸决定接受糖糖的求救,变身成“乐天使”。此后,她将和学校中的四位同学成为“光之美少女”,一同聚集象征幸福的“治愈饰物”(Cure Decor),好让女王复活对抗敌人。Once upon a time, there was a kingdom of fairy tales called "Märchenland", where many fairy tale characters live together in joy. Suddenly, the evil emperor Pierrot made an invasion on Märchenland, sealing its Queen in the process. To revive the Queen, the symbol of happiness called Cure Decor, "the Queen's scattered power of light of happiness", is required. To collect the Cure Decor, a fairy named Candy searches for the Pretty Cures on Earth. There, Candy meets a girl, who decides to collect the Cure Decor. Now, will the world earn a "happy ending"?