25 Days of Gays: A Frozen Flower (2008)

A Frozen Flower (Ssang-hwa-jeom) is a historical drama from South Korea, which chronicles the relationship between a king (played by Jin-mo Ju) and his most trusted guard and lover Hong (played by In-sung Jo). When the King is forced to marry and produce an heir to continue his dynasty, his homosexuality gets in the way and he orders Hong to bed the new Queen to give him the heir he needs. Things spiral out of control as Hong and the Queen develop feelings for one another, just as the King's paranoia reaches a breaking point due to outside forces seeking his throne. In-sung Jo gets several rear nude scenes. Jin-mo Ju has several shirtless scenes. There's also a scene featuring naked frolicking from other unnamed guards in a lake.