Pretty Rhythm: Hearts of Stars is User: Miki-Prism-Star's fourth fanfiction.
A young girl, Shizuku Shirojima, dreams of becoming a famous musican, suddenly has her life changed around when she classmate, Reo Himemiya, sees her practicing ice skating like a Prism Star, and asks Shizuku to join her in becoming Prism Stars and successfully performing the legendary Prism Jump, Hearts of Stars together. Shizuku now journys to become a top Prism Star.
- Shizuku is the main protagonist. She is a lovely-type and her main color is pink.
- Reo is a protagonist and is Shizuku's classmate. She is a pop-type and her main color is blue. She is also revealed to be a Prism World Messenger.
- Miru is a protagonist and is Reo and Shizuku's classmate. She is a feminine-type and her main color is gold.