Even though she is unable to have a proper wedding due to the disapproval of in-laws, Yeon Hee has been a great mother, wife, and daughter-in-law for 25 years. However, everything changes when Yu Na, her husband Jun Ho's mistress, appears and Yeon Hee's health deteriorates as well. Unlike Yeon Hee, Yu Na is a woman who abandons her sacrificial husband, Jae Kyung, and her son, Ha Neul, and chooses Jun Ho for success although Jun Ho is married and she had already rejected him 10 years ago. The four completely different people try to form a different kind of family and try hard to remain together.

Internal medicine doctor In Ah believes hormones can control a person's health, personality, and even feelings of love. One day, the ideal research subject to test out her theory appears in front of her. That person is surgeon Seung Joo who was once the most excellent person in the world. But after suffering a car accident in which debris becomes lodged in his brain, he turns into an unforgivingly competitive person. After the accident, Seung Joo begins to obsess about only the success rate of his surgeries. The accident left him with abnormally high spatial perception, giving him the ability to simulate surgeries in his mind, and he becomes the star of his department. Meanwhile, after a misunderstanding causes Seung Joo to blame In Ah as the main culprit for having a ticking time bomb stuck in his head, he starts to torment her and ends up forcing her to leave the hospital.

Just 18 months into being a top-selling girl group, the Treasure Girls disband. A quick ten-year hop in the future, their lead vocalist Ae Jung goes through many difficulties releasing one controversy flop after another. On the other hand, Ko Jin is the epitome of a perfect man in the eyes of every Korean lady. He's hot, he's humble, and he's got a great set of movies on his career. The two meet, but what's covered in glitz and glamour is apparently a facade of what's real.

Yoo Suk (Kim Ju Hyuk), a kind-hearted man, discovers his fiancée Na Ri (Lee Si Young) is manipulating him for money. After taking out a loan for their love nest, Na Ri abandons him when she can no longer exploit his finances. While searching for her, Yoo Suk encounters Ae Yeon (Lee Yoon Ji), a heartbroken police officer, and they gradually develop a connection. Na Ri becomes entangled with a dangerous mobster, stealing his money and testing the limits of their relationship. This film explores themes of betrayal, unexpected love, and personal redemption. "Couples" is a 2011 South Korean movie directed by Jung Yong Gi, based on the 2005 Japanese film "A Stranger of Mine."