The private training record of a beautiful new half-transgender gal-type woman, Rei, is revealed. During adolescence, Rei discovered her father's hidden SM novels, which deeply stirred her emotions. However, what truly captivated Rei wasn't the idea of training others, but rather her own desire as a masochistic woman seeking pleasure. After fully transitioning into a female body through hormone therapy and surgery, Rei embraces her new self by getting nipple piercings, sensations that lead her directly to the peak of masochistic female pleasure.