Matsui volunteers to appear in search of the passionate sex she has always wanted, admitting that masturbation is the only way she has ever reached orgasm. Raised by strict parents, she had a sheltered youth and little experience with men before marrying early at their urging. She had once hoped to date more and explore before settling down, and her curiosity about sex never faded. Now she decides to risk a single affair in hopes of experiencing pleasure intense enough to blank her mind.