At Noble Academy, a prestigious boarding school, young Haruka Haruno enrolls with dreams of becoming a princess. With the revival of the Princess Precures through magical artifacts, Haruka transforms into Cure Flora, the flower princess. Alongside her companions, the elegant Cure Mermaid and the sparkling Cure Twinkle, they combat the malevolent witch Dispia to protect people's dreams. As the girls navigate dorm life, friendship, and their intertwined fates, Haruka discovers the true identity of her childhood friend Kanata as Prince Hope Grand Kanata from the Hope Kingdom.