On her first day at the small production house run by her father, Tsumugi Takanashi never anticipated being appointed manager of the agency's new male idol ensemble. Although astonished that her dad entrusts her with such a significant assignment so early, Tsumugi promises to support the seven young performers in every way. After witnessing how well the boys collaborate, Tsumugi meets with her father and discovers that her initial duty as manager will involve trimming four members from the group. He believes that managing seven idols is too burdensome, especially since the leading act, TRIGGER, consists of only three singers. During an impromptu try‑out, Tsumugi returns to her father and firmly states that she will not cut anyone from the lineup, arguing that each idol brings a distinct charm that strengthens the collective appeal. She then informs the boys, who rejoice at the news that none will be denied their aspirations. Together they form IDOLiSH7 and set out to conquer the fiercely competitive idol arena. With confidence, the group embarks on a journey to shine brighter than any rival act in the industry.
