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"...

While recovering in the hospital, Sogo 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.