25 Days of Gays: Utopians (2015)

Utopians is a romantic drama from writer/director Scud (Amphetamine). It tells the story of Hins (played by Adonis He Fei), a university student who finds himself attracted to his outspoken married professor Ming (played by Jackie Chow), despite his relationship with his female classmate Joey. Hins immerses himself into Ming's world, which includes a bevy of half-naked men, calling into question his ideas about relationships and sexuality. Adonis shows tons of skin in the film, including frontal and rear nudity. Jackie also shows rear and frontal nudity. There's also rear and frontal nudity from a host of other actors playing bit parts as Ming's party pals. Gavin Philip Che, Timmy Hung, Eric Cheng, William Lo and Jung Jen Pao all show rear and frontal nudity as well. There are a few erect moments and even a masturbation scene for Adonis in the film's uncensored version. Screencaps from that version are included at the end of the post.