Nami Okimiya is a married woman who works as a seminar instructor for corporate training. Her husband deeply loves her, captivated by her beauty and figure. Yet recently, he's become aware of an unsettling feeling—the fact that he hasn't been making love to Nami. One day, she confides in him about receiving lewd questions during a seminar, expressing her discomfort. This triggers an intense, overwhelming emotion within him: a cuckolding desire. He becomes consumed by the urge to witness Nami being taken by some unknown man. Gradually, he brings up the topic of cuckold circles, explaining to his wife how such relationships exist. Soon, he takes her to a porn theater, setting their plan into motion.