IDOLiSH7 is set to hold its second concert in the open air arena where they first failed. With a local news station coming to cover the event, everyone is excited to put on the best performance possible. However, ominous clouds are on the horizon...

Sougo Osaka and Tamaki Yotsuba are set to debut with Takanashi Productions as duo "MEZZO." But first, the group goes camping by the river, where they learn more about each other and strengthen their friendships.

IDOLiSH7 begins hosting a web show to promote themselves. Though the production is far from perfect, everyone seems to be enjoying it. Meanwhile, Yamato receives an offer to appear in a TV drama...

Having finally gained enough popularity, Otoharu decides it's time for IDOLiSH7 to debut. He sends them to Okinawa to film the promotional video for their debut single, but once they arrive, they discover TRIGGER is also there filming...

Press conferences, an album tour, and even a TV show. Things are starting to look up for IDOLiSH7. However, with their exhaustion finally catching up to them, the future doesn't look so sunny for MEZZO"...

IDOLiSH7 is invited to perform on Sound Ship along with various other artists, including TRIGGER. Given TRIGGER's popularity, it's no surprise that most of the fans in the audience are here to see them. IDOLiSH7 puts on a great performance regardless, but Riku notices that TRIGGER still hasn't come to the stage...

As the boys reflect on their feelings towards being idols, they find themselves drawn to the same park, where they reaffirm their commitment to IDOLiSH7. Later, Nagi reveals the secret identity of the composer of IDOLiSH7's songs...

IDOLiSH7 wins the JIMA New Artist award, which means they'll compete against TRIGGER at Black or White! Their work has earned them the attention of Douglas Rootbank, a famous American pop-rock artist. While Iori and Tamaki wait for the others to show up for their group meeting, a strange looking maintenance employee shows up...

IDOLiSH7 achieves their long-held dream of having their own namesake show, and the members feel like celebrating. President Takanashi explains that Mitsuki's talent for MCing that he's been displaying on variety programs was big for the group. Mitsuki cries tears of joy over the recognition he has received. The group begins planning more jobs to promote their show, and they are soon invited onto the show of top idols Re:vale. It will be their first real appearance with their seniors Re:vale. The members wait anxiously in their greenroom, but when Momo and Yuki arrive...?!

Yuki declares that he'll recommend IDOLiSH7 for the currently undecided performance slot at the Zero Arena inaugural concert. Zero Arena's general manager is scheduled to come to their next concert, so Tsumugi, who is in charge of the group's stage production, heads to Zero Arena to gather ideas. There she encounters a gentleman who claims to have worked in stage production in the past. Tsumugi's heart is moved by the way he describes his feelings towards idols standing onstage. His hints help her finish the set, and the concert begins!

Given Riku's unstable condition, Iori takes over as IDOLiSH7's center. The newly reborn IDOLiSH7 gets off to a solid start, both their first namesake show "Lovely Night With You!" and Mitsuki's MCing are well received, and the group's popularity grows.

Re:vale brings a new offer to the table: for IDOLiSH7 and TRIGGER to appear as surprise guests at Re:vale's fifth anniversary Zero Arena inaugural concert, and for the two groups to perform together as one special group.

Mitsuki is traumatized when he happens to overhear some fans talking about him. Riku is criticized on social media by Iori's fans and begins behaving awkwardly towards him. Though Sougo is worried about the situation, he has his own concerns regarding Tamaki...

While taping a music program, Momo suddenly loses the ability to sing. Unable to determine the cause, the posters for the inaugural concert are vandalized, and uneasiness hangs in the air. Meanwhile, Tsumugi decides to convey her own feelings in an attempt to cheer up Riku and the other members, who have been feeling down.

IDOLiSH7 and TRIGGER begin practicing as a special unit for Re:vale's 5th anniversary concert. While many of the members are off their game, Gaku, Tenn, and Ryunosuke discuss their thoughts, and the individual groups begin to open up to each other.

Momo remains unable to sing. He recounts Re:vale's history to the concerned members of IDOLiSH7. As an indie artist, Yuki worked with a different partner, and Momo was one of their fans.

Graffiti is written on posters for the inaugural concert. The rumor that the missing legendary idol Zero is responsible spreads. Meanwhile, IDOLiSH7 will release a new song with their second album, and Riku will return to the center position.

IDOLiSH7 is accused of appropriating Zero's songs, so Takanashi Production holds a press conference. Nagi volunteers to face the press and explains that he was officially given the rights to the song by composer Haruki Sakura. However, a suspicious man dressed as Zero appears at the press conference, aggravating the scandal.

Filming for the drama Tamaki and Sougo are co-starring in is going well. However, Sougo continues to worry about his encounter with Tamaki's younger sister, which he hasn't been able to tell anyone about. On the final day of the special unit's joint practice, Tamaki is shocked to discover that Sougo couldn't trust him enough to tell him about Aya.

Tamaki and Aya are finally reunited. Tamaki wants the two of them to live together, but Aya informs him that she wants to remain with her new father who has been taking care of her. A surprising figure appears before the dumbfounded group. When they learn of his ambition, IDOLiSH7's feelings are united--

Re:vale prepare to close out the inaugural concert. The IDOLiSH7 and Trigger shuffle units perform the opening act. While watching their juniors perform, Momo and Yuki look back on the past five years they've walked together.

IDOLiSH7 is set to hold a debut anniversary tour. Along with TRIGGER and Re:vale, all three groups are attracting a lot of attention in the idol industry. Their members attend the Akebono TV 50th anniversary party.

Mitsuki and Nagi learn that Yamato has a secret based on his behavior at the party. Rather than being troubled by the secret itself, Nagi can't accept that Yamato is closing himself off from his friends. Yamato himself encounters his first acting wall at the filming location of his movie...

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An argument leads Mitsuki, Yamato, and Iori to leave the dorm. Iori and Mitsuki stay at Momo's place, while Yamato stays at Yuki's. Riku and the other boys left at the dorm feel increasingly sad to see their groupmates scattered.