The Last Winter (1978)

When Min-woo disappears while working overseas, his fiance falls into despair. Min-woo's friend marries the pregnant woman to take care of her and the two of them fall in love. But 15 months later, it is revealed that Min-woo had been kidnapped by terrorists and has now been rescued. This leaves the couple in a state of confusion about how to deal with their hasty decision and how to face their friend.