Pong AKA Mulberry (1986) - Doo-yong Lee

 

 Sam-po is a gambler living without concern for how his wife will manage their household without his earning money. In order to get food and provisions, his wife An-hyeob, sleeps with various merchants in the village… Mulberry is a 1986 South Korean erotic drama film directed by Lee Doo-yong. Based on the eponymous classic story by Na Do-hyang, the film became known for its erotic subject matter, made possible by the government's gradual relaxation of censorship and control over the film industry during the 1980s.

Liheoseol aka Rehearsal (1995) - Jeong-su Kang

IMDB says:
Min-su meets beautiful actress Seung-hae when he goes on a job to take care of a financial matter with the local theater. Min-su seduces her and they make passionate love. But their physical relationship begins to take a toll on them. Seung-hae decides that Min-su is a distraction to her budding career. She tries to end things with him so that she can concentrate on her performance in "Hiroshima Mon Amour" . But Min-su is not so easy to get rid of.

Hera Purple (2001) - Kil-chae Jeong

Story:
A woman troubled by vague anxiety consults a psychiatrist. To obtain a faster diagnosis, he uses hypnotism. This results in what is for the audience an extensive series of homicidal sex fantasies. How much of them could possibly be real? Meanwhile, a team of detectives (with funny personalities and "morgue" humor) is investigating a series of very strange murders that seem to parallel the woman's "fantasies".

Red Vacance Black Wedding (2011) - Kyungsook Suh

These two history, featuring the same actors, are a study of infidelity. "Red Vacance" tells the story of a married man having an affair with a younger woman. "Black Wedding" features a woman who asks an old lover to officiate her wedding.

The Weight (2012) - Kyu-hwan Jeon

Quote:
The Weight, portrays the life of Jung(Cho Jae-Huyn) who grew up as an orphan and was adopted into a family of only a mother and a son. Jung is now a hunchback man due to scoliosis and is a live-in mortician taking care of corpses in the most eerie manner. His brother wants to become a woman and their mother, who now hates both of her sons, will not accept her real son's female identity. Jung lives a secluded life trying to deal with his family's problems along with his own.

Masitneun sex geurigo sarang AKA Sweet Sex And Love (2003) - Man-dae Bong

A girl, bored with her current relationship, dumps her boyfriend and starts a new relationship. The new relationship goes well and they move in together, but things start to go downhill.

Comments from imdb:
Though this movie will certainly be remembered much more by its numerous erotic scenes, which though carefully choreographed still won't be to everybody's likings, the other its part shouldn't be overlooked however; it deals with love and everyday problems of life being spent together. Overall, it's a sad story about love between two people and their up's and down's while they are together swimming through everyday life. Worth looking just for the end itself if not for anything else. 7/10

Baramnan Gajok AKA A Good Lawyer's Wife (2003) - Sang-soo Im

Quote:
Bored, horny, and frustrated, a woman begins an affair with a teenage boy.