The story takes place in the wintry land of Shantia, with Manatsu and the others invited to the land by its princess Sharon. But as they arrive, a mysterious monster attacks Shantia, and it is closed off to outsiders. (Source: ANN)

The story is set in Nagasaki prefecture in Minami Shimabara city, the fabled origin of the Shimabara Rebellion that sent shockwaves through all of Japan in the early Edo period. It is also where a third-year junior high school student named Shirou spends his days with his school friends. One summer day, Shirou's older childhood friend Akane returns to Minami Shimabara from Tokyo. Shirou and Akane take a stroll around Minami Shimabara with another longtime friend, Tokiya. While these friends are dealing with nostalgia and more complex feelings, a mysterious creature named Goron suddenly appears before them. This encounter with a mere little creature causes great events to unfold once more in this city... (Source: ANN)

Uta Sakura is a lively and energetic middle school student who loves singing. One day, while walking her dog, she encounters a cute, peach-like fairy named Purirun, who is searching for the Legendary Protectors Idol Precure. Purirun's hometown, KirakiLand, was a peaceful, sparkly place but has been forced into darkness by the villainous Darkine, leader of the Chokkiri Gang. Uta decides to help Purirun search for cheerful and happy people to become the Precure so KirakiLand can become bright again. Suddenly, the Chokkiri gang arrive in Hanamichi Town, Uta's hometown, and steal the sparkles from the townspeople. Uta decides to illuminate the darkness with sparkles from her song and is granted the power to transform into the Legendary Protector, Cure Idol.