Schoolgirl Yumemi has always struggled with physical education class. Not only was she uncoordinated, but she also dreaded practice sessions in the equipment room. Seeing her difficulties, her classmates decided to help her improve her athletic skills and boost her confidence. One day, they proposed a special plan: "Let's make Yumemi super athletic!" The plan began with private training in the gym storage room. Yumemi was called in and found her secret crush, Noboru, waiting inside. Eager to impress him, she began following his enthusiastic guidance, starting with stretching exercises. However, as they stretched together, Noboru began showing obvious signs of arousal. Caught in the moment, Yumemi surrendered to Noboru's unspoken curriculum, embarking on an entirely new kind of physical experience.