Tsubomi Hanasaki, a second-year middle schooler who loves flowers and plants, dreams of a great tree wilting and its fairies vanishing. After she transfers to Myoudou Academy, the fairies from that dream appear before her and beg her to become Pretty Cure and protect the Great Tree, but Tsubomi turns them down. Then a sudden enemy attack steals the Heart Seed of her new classmate Erika Kurumi, and to save Erika's heart, Tsubomi has no choice but to transform and fight. This manga adapts the anime series of the same name.