Moe, a diligent female college student, and her boyfriend are both virgins, so they have trouble having sex, and Moe is not satisfied with the situation. One day, her father's old friend, Miyoshi's uncle, comes to visit her house, and they end up having a physical relationship while drunk. Moe's body and Kokoro are seduced by the middle-aged man's outstanding techniques, and from that day on, her sensitive body becomes easily stimulated by older men, and she cannot control herself and begins to seduce the middle-aged man herself...