Individual pieces of human emotion usually take form as flowers known as Fragments. The select few who possess strong enough Fragments can become Reflectors, beings who equip specialized rings that allow them to connect their thoughts, memories, and emotions to those whose feelings waver. There are two types of Reflectors—those who wear blue rings to protect those falling into depravity by preserving their Fragments, and those who wear red rings to prevent negative emotions by stealing the Fragments of those who begin to develop severe woe. Despite wanting to socialize with people around her, transfer student Ruka Hanari's shy and introverted personality always gets in her way. In a chance encounter, however, she bumps into a woman who happens to drop a blue ring as she hurries away. Unable to return it, Ruka brings it back with her to her dorm. There, she meets the outgoing Hiori Hirahara, who also has a blue ring. They find themselves in several conflicts against red Reflectors, slowly realizing the true power of the rings that they hold. Now striving to become Reflectors themselves, Ruka and Hiori must learn to work together and become stronger so that they can save not only the people around them, but also themselves from the emotions that hold them back.

Daddy Long Legs is based on the novel of the same name by Jean Webster. It chronicles the adventures of Judy Abbott, an orphan in New York. During a meeting for the superintendent, with other important and rich people in attendance, a scholarship is offered to Judy by a mysterious benefactor. Catching only a glimpse of his tall shadow as he leaves, Judy calls him Daddy Long Legs and writes him letters every month as per his request. While studying at the Lincoln Memorial school, she makes many friends and learns about a world she never knew about before. (Source: ANN)

Sunao Moriyama finds a strange but cute creature that he names Potemayo. Potemayo starts following him everywhere, usually riding on top of his head. His discovery becomes the center of attention in his class at school. Soon after, a similar creature appears, and is named Guchuko by one of Sunao's classmates. However, Guchuko doesn't seem to be as good-natured as Potemayo. (Source: ANN)

Major Land is a colorful world of music where instruments and notes come to life. During an annual concert event, Hummy, the cat songstress of Major Land, prepares to sing the Melody of Happiness, capable of spreading happiness to worlds beyond. However, Mephisto, the king of Minor Land, interrupts the event and rewrites the score into the Melody of Sorrow—a dissonant composition that would instead cause despair when performed. In order to prevent this from happening, Hummy is tasked with finding the Precure, renowned warriors with an unmatched passion for music, and recreating the Melody of Happiness. Hummy arrives in Kanon Town, home of musically-inclined athlete Hibiki Houjou and studious baker Kanade Minamino. Engaging only in endless bickers, Hibiki and Kanade were formerly best friends and have since fallen out of touch. Their activities are stopped short by an unwelcome guest—the songstress of Minor Land, Siren. When Siren turns an important record into a gigantic monster, the girls' hearts resonate with the desire to protect what they hold dear and the two transform into the Suite Precure! As legendary warriors, Hibiki and Kanade will have to put their personal squabbles aside if they wish to protect the happiness of the world.