Unable to gather enough Harmony Energy to fight alone, Mai holds auditions to recruit idols to help. Kanon auditions and meets another contestant, Alice Kagurazaka. The Dokudoku-dan turns Alice's mother, Shizuko Kagurazaka, into the Negative Jeweler, Hysteris, and she is outraged when Alice fails the first audition. To rescue her, Kanon is summoned by Poppun and battles alongside Mai, recovering the Violin Jewel.

During the final auditions, Kanon is chosen to be part of Mai's new group, Miracle², along with dance prodigy Fuka. Fuka is not interested in becoming an idol warrior, but she joins when Okada, a teacher from her elementary school, is turned into the Negative Jeweler, Koegare. After defeating him, Miracle Tunes recovers the Piano Jewel.

Kanon and Fuka move into the dormitory, and Kanon begins her first day of school at Angie Private Academy. The crossing guard is turned into the Negative Jeweler, Katakotoyanen, and Miracle Tunes defeats her to recover the Samba Jewel. With their Harmony Energy charged, Miracle² records their song, "Catch Me!", to prepare for their debut.

Miracle²'s debut event draws near, and Kanon invites her classmates to attend. However, right before the event, the Dokudoku-dan turns a pet groomer into the Negative Jeweler, Nekojita, hoping to spread the Negative Aura to pet animals, starting with the dog of Rudolph, Kanon's classmate. Miracle Tunes defeats Nekojita and recovers the Mambo Jewel.

For Mother's Day, the girls decide to give their mother figures a flower bouquet. However, the florist has been turned into the Negative Jeweler, Tearegimi, who is spreading her Negative Aura through flowers. Miracle Tunes defeats her, recovering the Trumpet Jewel.

Miracle² films their first television appearance with popular child star Ryo on his cooking show, but when one of his fans turns into the Negative Jeweler, Kubittake, she begins to turn the rest of his fans against him, leaving Miracle Tunes to rescue him and recover the Flute Jewel.

A camera crew follows Kanon for the entire day to get an exclusive interview with her. Kanon becomes careful about her image, until she and her classmate, Yunta, start throwing garbage at each other. Meanwhile, a garbage man becomes the Negative Jeweler, Honeorizon, causing him to block Park Road up with garbage. Miracle Tunes defeats him and recovers the Folk Jewel.

Kojiro takes the girls shopping, to Fuka's displeasure. Meanwhile, the Dokudoku-dan turns Kojiro's hairstylist friend into the Negative Jeweler, Neguserin. Miracle Tunes defeats him and recovers the Hip Hop Jewel.

Seitaro, Mai's father, returns from overseas and invites Mai to watch him conduct an orchestra. While Mai is at the concert, two birthday party entertainers (Afro Goto and Junichi Takahashi) are turned into the Negative Jewelers, Yo One and Yo Two. Mai decides to leave to help Kanon and Fuka, and they use the Hip Hop Jewel to purify the Negative Jewelers. After recovering the Rock Jewel, Mai returns in time for her father's concert and bids him farewell when he leaves the country again.

While Miracle² is interviewed on radio, Iwamoto (Akihiro Kakuta), Kanon's father's old bandmate, is turned into the Negative Jeweler, Mimizawari. Miracle Tunes uses the Rock Jewel to purify him and recover the Techno Jewel. However, their excitement is short-lived when they are notified that KariKari, a pop idol duo from the United States consisting of sisters Akari and Hikari, will be debuting in Japan.

Mai and Fuka are concerned about KariKari, whose popularity threatens their ability to gather Harmony Energy, while Kanon's classmates advise her to get her future told by the techno fortune teller, Jupiter Kazuo (Satoshi Judai). Jupiter Kazuo is turned into the Negative Jeweler, Senrigan, whose fortunes all lead to a dismal future for each of his clients. Miracle Tunes use the Techno Jewel to defeat him and recover the Reggae Jewel.

Fuka is upset at her parents cancelling their visit home, and while a parent-teacher meeting takes place at their school, and Mr. Sakurai is turned into the Negative Jeweler, Sunegajiri. Miracle Tunes defeats him by having Mai answer his questions correctly, and they recover the Castanet Jewel. Afterwards, Fuka receives a doll in the mail from her parents and makes amends with Kanon.

Miracle² and KariKari perform on the music competition program, Music Coliseum. Meanwhile, Kojiro becomes a guest on Chris Maeda's (Ken'ya Ōsumi) fitness program. When Chris turns into the Negative Jeweler, Taishibo, Miracle Tunes defeat him and recover the Salsa Jewel, with KariKari and Komuragaeri discovering their secret.

Now that the Dokudoku-dan know Miracle Tunes' true identities, they transform a reporter (Wakana Matsumoto) into the Negative Jeweler, Kikimimitatecchi, while Miracle² is scheduled to perform. Akari and Hikari volunteer to fight instead, with Alm and Sopra offering their Sound Jewels to them. They defeat the Negative Jeweler to recover the Waltz Jewel. After they return to the filming location, Sawanobori announces that both teams have won the competition, since Akari and Hikari are now part of Miracle².

With Akari and Hikari as the group's new members, Miracle² holds a press conference. During the press conference, a reporter (Kouichi Oohori) is turned into the Negative Jeweler, Tabesugi. Akari uses her Miracle Tambourine to activate a barrier to protect Miracle Tunes, and they defeat him, recovering the Ballad Jewel.

While recording Miracle²'s new song, "Jump!", Mizoochi turns the song producer (Hiroshi Yamamoto) into the Negative Jeweler, Anotekonote, who puts Sawanobori under his control and attacks Hikari. Miracle Tunes defeat him with the Techno Jewel to recover the Maracas Jewel.

Miracle² holds a performance at Kamome Records to celebrate the release of their newest single, where it is rumored that idols who perform there will experience success. During the performance, the Dokudoku-dan turns the manager (Takeyasu Komiya) into the Negative Jeweler, Kowamote. Miracle Tunes defeats him, recovering the Enka Jewel. The Dokudoku-dan steal a bag, mistaking it for the Sound Jewel Case, but after being tricked, they declare war.

Miracle² is performing with Ayame Jindaiji (Nobue Iketani), a famous enka singer, on a music show, with Fuka's grandparents attending the show in support. Ayame is turned into the Negative Jeweler, Yanagigoshi. Miracle Tunes uses the Enka Jewel to tune her up, recovering the Horn Jewel. Meanwhile, Mizoochi infiltrates Miracle²'s dorm, only to be accosted by Kojiro.

Ryo invites Miracle² to his agency's building to watch the fireworks. Komuragaeri turns the CEO (Yoshiki Arizono) and his wife (Miho Ninagawa) into the Negative Jewelers, Wagamonogaozu. Kanon and Ryo are trapped in the elevator as Wagamonogaozu spreads a Negative Aura to the other guests, but once they are able to escape, Miracle Tunes purify and recover the Drum Jewel.

Miracle² trains at a temple in the mountains and share ghost stories at bedtime, but they become frightened navigating the temple at night. Komuragaeri sneaks into the temple and turns the priest (Yoichi Nukumizu) into the Negative Jeweler, Nodobotoke, and they scare Miracle Tunes. However, Komuragaeri mistakens Yuzuhara for a ghost and flees, allowing Miracle Tunes to tune up and recover the Punk Jewel.

Miracle² become judges for a comedian audition. Nechigae infiltrates the audition and turns Kojiro into the Negative Jeweler, Kuchibiru Pururun, who begins to target young men. Miracle Tunes defeat him and recover the Harmonica Jewel, but the Dokudoku-dan hypnotize Kojiro and kidnap him.

Kanon receives a ransom note during Miracle²'s handshake event demanding the Sound Jewel Case in exchange for Kojiro, though Kojiro escapes on his own. She secretly takes the Sound Jewel Case to the Dokudoku-dan. The Dokudoku-dan turn a construction worker (Kanji Tsuda) into the Negative Jeweler, Hofukuzettoka, and steal the Sound Jewel Case, but the rest of the girls come to her rescue. Miracle Tunes takes the Sound Jewel Case back uses the Rock Jewel to tune up Hofukuzettoka, recovering the Metal Jewel.

Miracle² is set to film a television segment. During shooting, Nechigae steals the Sound Jewel Case and turns the director (Yoshiko Inoue) into the Negative Jeweler, Haradekke. Miracle Tunes pursues Nechigae and takes back the Sound Jewel Case while Yuzuhara distracts Haradekke, attempting to transform using her Idol Jewel. Though it fails, Miracle Tunes rescues her and recovers the Marching Jewel.

While Kanon's class is having art class outside, Komuragaeri infiltrates her school and turns the art teacher (Toru Tezuka) into the Negative Jeweler, Shinbigan, who puts the students under his control. Miracle Tunes defeats him and recovers the Ocarina Jewel.

Miracle² films their television show at Montana, the cake shop Kanon's mother works at. Nechigae turns the shop assistants (Kanon Nanaki and Satomi Ohkubo) into the Negative Jewelers Mushiba and Sashiba. Miracle Tunes uses the Hip Hop Jewel to engage them in a rap battle and defeat them, recovering the Opera Jewel. Meanwhile, Kanon's mother witnesses their battle but decides not to tell her.