Nyan Nyan Musume(1984)

A sexy sister-in-law instead of a quiet wife! An innocent sister-in-law instead of a horny wife! Two men struggle with their sex lives and they decide to swap wives. Jong-woo is frustrated with his wife Jae-hee because she's so silent in bed. He talks to Ji-yeong about this and she tells him she hasn't had satisfying sex ever with her quiet husband Min-soo. Jong-woo and Ji-yeong find out they enjoy various positions and plays and end up spending a night together. Meanwhile, Jae-hee and Min-soo also want something soft and affectionate and the couples can't be stopped now...

Yexel, an influencer, experiences the best sex of his life when he meets Mina. But their no-label relationship turns to obsession when she learns that he's having sex with other women.

A husband is a workaholic and doesn't care about his family. The wife is tired of neighborhood relationships such as the neighborhood association of the housing complex that interfere with her privacy. Her husband pretends to be indifferent to the wife. She finally loses her temper and starts a rebellion against her husband, but then her evil seductive hand reaches out...

A female college student who would have ended up in an ordinary life, ordinary sex, and eventually an ordinary marriage is drawn into an unusual sexual experience by chance. She's a private tutor who intervenes between a son and his mother. This strange love triangle creates a skewed sexual relationship. Nikkatsu depicts the subtleties of female psychology, which sways subtly in such a perverted world.

Married couple Fujijiro and Taeko live at the foot of Mt. Fuji with their 3-year-old daughter Natsuko. One day, Taeko is assaulted and later gives birth to Kanako. Unable to bear village rumors, Taeko commits suicide. 20 years later, Natsuko goes a quest to find the missing Kanako after seeing her picture in a gravure magazine...

Years have passed since the first film. Goro never got over the death of his partner and continues to drown his misery in alcohol. His latest work as a private detective involves spying on a man suspected of adultery by his wife. She happens to be right, but he's cheating on her with a male university student and not another woman. When that student turns up dead shortly after Goro delivers his results, he is initially indifferent. But then he's absudcted and beaten to within an inch of his life by people who clearly want to ensure his silence, and that changes things. Turns out, his past once again comes back to haunt him.

A woman marries the fiancé of her late sister but begins to have doubts when he starts to get overly friendly with a former classmate.

The owner of a love hotel takes us inside the rooms of three couples, a gambler and his mistress, a photographer and a model and a teacher with a female student.

The story of a young man who tragically lost his lover in a horriffic motorcycle accident. Now working at a video store and selling uncensored gay hardcore pornography under the counter, he one day discovers the worlds most bizarre snuff video... which happens to "star" a man who looks exactly like his dead lover. Pushed over the edge by this event, the protagonist goes on a violent rampage, attempting to murder everybody involved in the video's creation.

Fujiko has won a happy marriage after competing with her friend Kanae for Shunsuke, but her boring daily life and dissatisfaction with her husband only grows day by day. Meanwhile, Kanae, who has married a doctor named Seizo and lives a wealthy life, is also fed up with her boring daily life, although she has given up Shunsuke to Fujiko.

A wealthy man has relationships with a married woman, an office lady and a high school girl. Two of them are friends, two are sisters and one leaves him frustrated.

Yeon-i who runs a small salon is shaken by Geon-dal’s suggestion to run the salon as an adult service business when customers start to run out. After experiencing the sales method that enables customers to touch female employees while being shampooed and while receiving other services, Yeon-i leaves the salon, but after a few months, she suffers from living difficulties and visits Geon-dal again