A Man and a Woman(2016)

On a cold winter day, a strange man and woman named Sang Min and Ki Hong accompany their exceptional children to school for camping. But the way back to the city is blocked due to snow and storm, they are forced to spend the night together. The next morning, they say goodbye without knowing each other's names. Several months later, when they happen to meet each other, they find out that a common feeling has arisen between them, while both of them are married...