Tatsuya accidentally breaks his friend's camera and suddenly needs money. To raise funds, he asks his stepmother Riko, who used to be a race queen, to participate in a photo shoot. Riko reluctantly agrees, putting on her old race queen outfit after years. However, the photographers aren't satisfied with simple cosplay pictures and gradually escalate their demands. Initially embarrassed, Riko slowly begins to find pleasure in being photographed. Seeing her transformation, Tatsuya and the photographers become increasingly aroused, driving the shoot into ever more intense and erotic territory.