25 Days of Gays: No Regret (2006)

No Regret is a drama from South Korea, which tells the story of an orphan named Su-min (played by Young-hoon Lee) trying to make a life for himself in Seoul where he draws the attention of a businessman, Jae-min (played by Han Lee), who soon becomes enamored with him. When Su-min loses his job he's lured into working as a prostitute in a brothel, while Jae-min's infatuation with the young man continues to grow. Young-hoon Lee is featured in a couple rear nude scenes during the film, in addition to ample shirtlessness throughout.