Hajime is devastated after performing so badly during sex with his first girlfriend that she nearly breaks up with him. His busty childhood friend Moka arrives and offers her own form of encouragement: she will teach him how to handle breasts. He follows Moka's instructions and practices directly on her, but her breathing soon turns heavy. What began as a helpful lesson feels so good that she forgets the tutorial, strips off her panties, and gives her inexperienced friend a hands-on bareback sex rescue.