In a place called Major Land, a Melody of Happiness is due to be played, spreading happiness throughout the world. However, an evil man named Mephisto steals the Legendary Score, plotting to turn it into a Melody of Sorrow to spread sadness across the land. Aphrodite, the queen of Major Land, scatters the Notes that make up the Legendary Score into the human world and sends a fairy named Hummy to a place called Kanon Town in order to recover them. There, Hummy meets two girls, Hibiki Hojo and Kanade Minamino, who are chosen to become the Suite Pretty Cure in order to recover the missing Notes and protect everyone's happiness.
