One Summer Night (2016)

One winter in 2013, Northern army Yong-joon and Jae-seong are having rough sex near the truce line. In the end, Yong-joon decides to run away to the South, leaving Jae-seong behind. He risks his life to step on the land of freedom and meets Tae-gyu. Although it's been about 2 years since they met, Yong-joon misses the North. One day, Jae-seong comes over to the South and Yong-joon must decide between Jae-seong and Tae-gyu. This causes misunderstandings and puts them in pain.