Pretty Rhythm: Dear My Future takes place three years after the events of Pretty Rhythm: Aurora Dream... At Pretty Top, a new generation of girls dreaming of being Prism Stars have endeavored through their training. One day, Reina Miyama, Karin Shijimi, and Ayami Ooruri find themselves on the same stage as their predecessors (Aira, Mion, and Rizumu), when Mia Ageha suddenly jumps up on stage and claims she will defeat Aira and demands to challenge the legendary Prism Show unit MARs. To keep this challenge, Mia forms a group with Karin, Reina, and Ayami, who are sent to become a new Prism Show unit, Prizmmy☆. As the girls waver and then jump back up, they deepen their friendship and aim for their debut together. To add to it all, 5 teenage girls, named Somin, Shiyoon, Haein, Chaekyung, and Jae Eun, have come from Korea to Japan to study at Pretty Top to have their debut as well, appearing as a rival group, PURETTY. In order to meet their future, the girls stand on the stage, and the show starts.