Yui, a busty wife who is troubled by sexlessness, is introduced to Katayama, a beauty consultant, through a friend's introduction. With a special oil and technique, Yui tastes a series of pleasures, and anal is also developed. Since then, Yui, who has been captivated by Katayama's treatment, follows her desires, no matter how embarrassing. That figure was exactly that of an anal guy...