Known as the perfect elite, department chief Ryoichi and his wife Keiko appear to be the ideal couple, radiating the mature charm of a blissful marriage. Yet behind this flawless facade lies a five-year-long sexless relationship. This pent-up frustration begins to manifest in disturbing ways. Ryoichi's only pleasure comes from watching videos of his wife having sex. To obtain more footage, Keiko meets men through dating apps, sucking cock in cars and provocatively going commando at liquor stores, teasing strangers by inserting and removing a vibrator while getting them hard. Each time, she is exposed to her beloved husband's hidden desires, a dark passion that drives her into deeper and deeper longing.