The R-rated South Korean film High Society was released in 2018. It stars Park Hae-il and Soo Ae in a tale of a socially powerful married couple.
The film was not particularly successful at the box office or otherwise so noteworthy, though there are several nude sex scenes in it.
The best one is with Kim Gyu-Sun, shown in a bed lying down while a guy has sex with her from on top and riding him in the cowgirl position while she wears hot pantyhose.
There is a less explicit sex scene featuring the cute Soo Ae, where a man has sex with her on a bed while lying down behind her and kissing her passionately.
It’s not all Korean ladies either, as the delightfully busty porn star Mao Hamasaki is shown in a nude sex scene where she rides a Korean guy in the backwards cowgirl, among other positions. This is an unusual mainstream depiction of lotion play, where her body is dripping with copious amounts of lube as they have sex over a sheet. It’s a fantasy scene that perhaps says quite a lot about Korean attitudes towards Japanese porn stars.