Takatuki Rei is a woman who had no interest in romance, sticking to minimal makeup and sporty clothing, maintaining a completely unfeminine lifestyle. In high school, she had one brief relationship and only one sexual experience, but due to the pain she felt during that encounter, she began avoiding sex altogether. She also never masturbated, living in a state of complete lack of sexual desire. For Rei, a new challenge begins—to reclaim her femininity. First, since she's never seen a penis in broad daylight, they show her a huge cock. Her reaction upon seeing it with her own eyes is a mix of shock and confusion: "Huh? It's this big?" Then, since she's never performed oral sex, they convince her to try it "for life experience." Confronted with the massive cock, Rei's eyes begin to sparkle, and gradually, her interest in romance starts to awaken. They then propose, "Wanna try putting this big cock inside you?" After a moment of hesitation, she quietly agrees, saying, "...Okay, fine." Moving to a filming studio, sex begins. Slowly, her feminine switch flips—she starts feeling pleasure, moaning, climaxing, moaning again, and feeling more pleasure, creating a highly sensitive positive feedback loop. She screams, "More, more!" shaking her massive G-cup breasts, orgasming intensely with rapid-fire stimulation, ultimately experiencing an unexpected triple creampie. In the end, she's fallen completely in love with big cocks.