Candy, a fairy from Märchenland follows the shining light that leads to the five legendary PreCure warriors in order to fight Bad End Kingdom villains who are trying to vanquish the entire world to the “Worst Ending.

By force of circumstances, a 30-year-old single man with a full-time job suddenly starts raising a 6-year-old girl. While running each other ragged, the two of them gradually grow into a "family".

Hibiki and Kanade are two friends who grew up together in Kanon Town. Very different in their personalities, they share one thing in common: A connection to music. No matter how different they are or how much their differences cause them to quarrel, they both continue to share loving hearts. One day they meet Hummy, who is sent to the Human World from Major Land to collect the scattered notes of the Melody of Happiness. They have to instantly transform into Pretty Cures to resist the threats and evil music from Mephisto. Can they stop the Melody of Sorrow from disrupting their peaceful town, and can their warped friendship measure up to the bonds of Pretty Cure?