Suite Precure♪

In the musical Major Land, a fairy named Hummy is due to sing the Melody of Happiness, which is to spread cheer throughout the land. However, the land is attacked by the evil Baron Mephisto and his assistant, Siren, who plans to turn it into a Melody of Sorrow. The goddess of Major Land, Aphrodite, scatters the Notes that make up the melodies throughout the land to keep them safe, and sends Hummy to Kanon Town to seek out two best friends to become Pretty Cure. Meanwhile, Hibiki Hojo and Kanade Minamono, two girls who used to be best friends, have not gotten along with each other for a while. Siren attempts to steal the Golden G-Clefs within their hearts; the power within them prevents it, but she instead discovers a Note inside their favorite record and transforms it into a monster known as a Negatone. Noticing their hearts sync up perfectly, Hummy gives Hibiki and Kanade the ability to transform into the Suite PreCures, Cure Melody and Cure Rhythm.

Hibiki and Kanade can not get their hearts in sync and soon drop out of their transformation, letting the Negatone run rampage. As Hummy inquires over why the two don't get along, Hibiki reveals that she was waiting for Kanade by a cherry blossom tree on the opening ceremony of school, but she never came. Kanade has a similar story, and when the two come across a child in the same situation, they realise the reason they didn't see each other was because they went to opposite sides of the school. With their confusion cleared up, the two manage to face off against the Negatone and defeat it, allowing Hummy to purify it back into a Note and keep it safe.

As Hibiki is questioned about why she's the only one in town who hates music, she reveals about her childhood. When Hibiki nervously entered a piano contest in the hopes of being treated to a trip to an amusement park, her father, Dan, told her that her music wasn't 'true music', which left her saddened with a bitterness for music. One of their classmates, Masamune Ouji, is also having trouble learning for Dan about playing true music. During a piano tournament, a Negatone attacks and Hibiki and Kanade struggle against it. During the battle, Dan plays music to distract the Negatone so the PreCure can defeat it, eventually revealing that 'true music' can only be played if you enjoy playing it. Afterwards, Hibiki comes to understand her father's words and starts practising on the piano with Kanade.

Kanade wants to enter a cake contest to impress her baking idol, Yoko Yamaguchi, but is having trouble coming up with ideas that would impress. Siren decides to disguise herself as Yoko and give Kanade private lessons to make some controversial cake designs that focus on presentation as opposed to taste. This causes her to come into conflict with Hibiki, who doesn't think much of these new cakes compared to the kinds Kanade usually makes. However, she soon realises the meaning behind Hibiki's words and makes an old fashioned strawberry cake, which Siren transforms into a Negatone, which the PreCure then defeat.

Hibiki's mother, Maria, calls and says that she's volunteered Kanade and Hibiki to do a TV report on the town. Kanade and Hibiki don't really want to do it but get sucked in by the perks and go ahead anyway. Whilst they initially clash with each other's style of reporting, they both end up having fun. Siren attempts to get on camera to play the Melody of Sorrow, but is thwarted and instead make a Negatone which the PreCure fight.

Kanade and her brother Souta don't seem to get along, but deep down do like each other. When Souta decides to make something for Kanade for White Day, Hibiki agrees to help her out in making a cake. However, Kanade yells at Souta for making a mess in the kitchen, causing him to become upset and run off, where he is trapped after Siren makes a Negatone out of his cake. As Kanade fights to reach Souta, Hibiki's desire to protect their sibling bonds grants her a new weapon, the Miracle Belltier, which she uses to defeat the Negatone. Afterwards, Kanade apologises to Souta and accepts the gift, only to find it is filled with wasabi.

As Hibiki and Kanade are leaving a church where they practise piano, they notice a doll left behind by the organ keeper, Otokichi Shirabe. They decide to try to return it, searching all around the city for him but having no such luck. When they almost forget the doll, it is transformed into a Negatone, which the PreCure fight.

Deciding the best way to stop the PreCure is to separate the bonds of friendship, Siren researches into Hibiki's likes and hobbies. Disguising herself as a transfer student named Sakura, Siren uses her knowledge to strike up a friendship with Hibiki in order to separate her from Kanade, allegedly feeling some signs of friendship herself. However, when Hibiki sprains her ankle during a judo match, Kanade's true friendship shines through. Siren's cover is soon blown and she ends up making a Headband Negatone for the PreCure to fight.

Kanade is a little downhearted that she doesn't have a Belltier like Hibiki's and feels she is always relying on her. With Hummy saying the Berthier came from Hibiki's 'Precure Power', Kanade tries to imitate Hibiki's appetite and sports ability to no avail. As Hibiki questions Kanade's behaviour, Siren creates a Cherry Blossom Negatone. When Hibiki's arm gets injured in the fight, Kanade's desire to protect everyone grants her the Fantastic Berthier, which allows her to defeat the Negatone.