IDOLiSH7 is asked to appear on the popular music program Music Festa. However, their exciting opportunity doesn't go exactly as planned. Will they be able to give the performance of their lives, or does disaster await?

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...

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"...

While recovering in the hospital, Sougo reveals his past and reason for becoming an idol to the other members of IDOLiSH7.

Meanwhile, Tenn grows increasingly suspicious of the origins of TRIGGER's new song.

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...

Scandalous and malicious articles about IDOLiSH7 begin popping up more and more in tabloids. Unsure of what is true and what isn't, the members begin turning on each other. Amidst rising tensions, Tamaki is asked to appear on a TV special featuring his emotional reunion with his family, but...

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.