"Kimama ni Idol" centers on the life of a young woman named Yui, who unexpectedly becomes an idol after being scouted by a talent agency. Yui, initially uninterested in the world of entertainment, reluctantly agrees to join the agency due to financial pressures and a desire to support her family. The series explores her journey as she navigates the challenges of the idol industry, balancing her personal life with the demands of fame, rigorous training, and public scrutiny.

The narrative delves into the dynamics of the idol group Yui joins, highlighting the relationships and rivalries among its members. Each character brings a unique personality and backstory, contributing to the group's chemistry and conflicts. Yui’s growth as an idol is marked by her struggles with self-doubt, the pressure to conform to industry standards, and her evolving understanding of what it means to be a performer. The series also examines the darker aspects of the idol world, such as exploitation, the toll of constant public attention, and the sacrifices required to maintain a pristine image.

Key supporting characters include the group’s manager, who acts as both a mentor and a source of tension, and Yui’s fellow idols, who each face their own challenges and aspirations. The story progresses through a series of performances, personal revelations, and moments of camaraderie, culminating in Yui’s gradual acceptance of her role as an idol and her determination to redefine what success means on her own terms. The series balances lighthearted moments with deeper emotional arcs, offering a multifaceted portrayal of the idol industry and the individuals within it.