Nice Sister-In-Law 4

"Trust me tonight" Min-ho is preparing to get a job and is spending some time in his parents' house. However, his parents aren't home and only his young sister-in-law is there. His brother Hyeon-soo had left the house after fighting with his wife. Min-ho can't help but feel attracted towards his young and appealing sister-in-law.

If you give it once, a good brother-in-law who gives everything generously will come! At the house of her girlfriend Jin-kyung, who lives with pumice stone, her brother and his wife suddenly visit and the four of them live together. At first, Kyung-seok, who was burdened by his girlfriend's brother, began to keep his eyes on his wife, Yeon-su. A bold brother-in-law who walks around in no-bra and panties without hesitation even at his sister-in-law's house. Besides, from a certain moment, he starts to send a hand of temptation to Pyeong-seok first...

Jung-tae has become a successful businessman. One day, he calls for a substitute driver, but the driver was Min-goo, the man who married his sexy crush, Yoo-ri. Jung-tae still hadn't forgotten Yoo-ri and learns that life if tough for this couple. Jung-tae suggests something to Min-goo and that is to let him live with Yoo-ri for a year in return for 300 million won and his house.

Stop peeking and let's have a fling. Min-ho works at a private detective agency where peeking into others' lives is what he does. One day, a pretty woman named Mi-na asks him to tail her husband and Min-ho is in for a shock. The man he's tracking down is in an affair with his wife, Soo-kyung. The place they meet each other is usually Min-ho's house after he's gone to work. Min-ho installs secret cameras to catch theem in action and watches the scene with Mi-na.

An art student named Gwang-ho gets dumped by his girlfriend because she was only his source of comfort, and that he's a Mama's boy and a premature ejaculator. He tries to avoid seeing her by going to a different academy and that's when his mother introduces him to her friend Soo-yeon, a sophisticated and intelligent looking woman. Gwang-ho falls for her. Gwang-ho's mother suddenly leaves for Australia because his father is sick and Gwang-ho gets to stay in Soo-yeon's house for a few days. Looking at her, he thinks of all the things he would like to do with her and Soo-yeon's niece Ha-kyeong stimulates him to do something about his feelings.

Joon-ho falls for his new step-mother, Min-joo. He suppresses his feelings because she is his father's woman, but one day his father passes away. In addition, the step-mother has been throwing him signs and her daughter Eun-jung leaves the house. Joon-ho is alone with Min-joo and he comforts her for losing her husband. However, he ends up comforting her not just mentally, but physically as well.

Do-won is a twenty-year-old who lives with his mom. However, he is secretly sleeping with his mother's friend Eun-ji who lives next door. One day, his mother's junior's husband dies and she moves into the neighborhood. Since then, his mother and her friends see alot of each other and So-jung who misses having a man, starts seducing Do-won...

My wife's mother, is better than my wife! Woo-suk married his wife Yoo-na because he loved her, but in the end, they go through a period of ennui and he's not happy with their sex life either. One day his wife goes to work without even making him breakfast and her mother comes home. She's a young-looking woman good enough to be in her 20s with a tiny waist and big breasts.

Twenty-year-old Jingu has an unrequited love for his housekeeper, Hyun-ah, who has a lush face, sexy body, and friendly personality. However, Hyeon-ah declares marriage to his father, not Jung-gu! One day, Jingu witnessed a scene where Hyun-a is having a hot time with a man other than his father, and he feels a tremendous sense of betrayal. Since then Jingu has shown her secretly filmed scenes, asking her to listen to only one wish...

Two couples vacation together. They were friends and campus couples in college. Meeting again after the years passed sparks new attractions.

Dae-sung and Jung-won have been married for two years. They are car pooling with the married couple next door. Woo-sung and Tae-hee don't interfere with each others' lives. However, these two couple don't just share cars, they share each others' wives too...