Over and Over Again, Gaeddong, 개똥이 (2013) dir. Kim Byung june

Two people who dont seem like identical twins, with both having love lives going nowhere. Yet, Gaeddong suffers from a traumatic childhood experience and is introverted with low selfesteem. Meanwhile, his friend Changsoo is proud and boisterous. As Gaeddong finds happiness, troubles reoccur, building to a final crescendo.