Joe Seo, Tae Song, Eric Jeong & naked extras in Spa Night (2016)

Spa Night tells the story of David (played by Joe Seo), a Korean-American teen who takes a job at a Korean spa to help his family finances. While there, the closeted David's struggles with his sexuality are heightened, especially when he discovers the hidden world of gay interactions occurring within the spa. Joe gets several scenes showing off his body, including some rear nudity and brief frontal nudity. David first visits the spa with his friends Eddie (played by Tae Song) and Peter (played by Eric Jeong). The trio show rear nudity in a lengthy shower sequence. There's also rear and frontal nudity throughout the movie by a host of background extras playing visitors to the spa.