Fueled by an unshakeable desire to become an idol, Yuu Azuma, an ambitious first-year student at Joshu East High School, sets out to create an idol group. To realize her dream, she recruits one girl from each of the four high schools in her region—situated to the north, east, south, and west—and quickly gathers her fellow members. Yuu is joined by Ranko Kashima, a refined second-year student at Holy Teneritas Southern Girls' Academy, notable for her curly hair and admiration for Madame Butterfly; Kurumi Taiga, a student at West Tech Vocational High School who wears cute, oversized long-sleeved jackets and aspires to win a robotics championship; and Mika Kamei, a student from Joshu North High School, recognized for her kindness and commitment to volunteering. Assisted by Shinji Kudou, Yuu's "collaborator" and trusted confidant, these four young girls begin their path to stardom. However, the journey conceals unforeseen challenges, strict demands, setbacks, and pressures that threaten to dismantle everything Yuu has worked so hard to achieve.