25 Days of Gays: Thanatos, Drunk (2015)

Thanatos, Drunk (Zui sheng meng si) is a film from Taiwan that centers on two brothers, one straight and one gay, as they struggle to find jobs to survive in the city, while also coming of age. Shang-Ho Huang plays older gay brother Shanghe, who also deals with his attraction to their housemate Shuo (played by Jen-Shuo Cheng), who works as a club dancer. While Shuo attempts to avoid Shanghe and his feelings, the two continue to be drawn together as Shanghe comes to his rescue. Both actors show rear nudity, in multiple scenes, including their characters' sex scene and the aftermath when Shanghe's brother discovers their tryst.