The foundation of this tale originates from the Idom@ster SideM application. 315 Production, a newcomer in the talent agency scene, has united an assortment of aspiring male idols with various career paths including law, medicine, aviation, and more. Despite their diverse backgrounds, they possess a single objective - to achieve idol supremacy. Therefore, the plot revolves around the personal experiences of these male idols during their journey with 315 Production. Additionally, an episode 0 is included.