비밀계약: 오! 나의 섹신님

After the death of his wife, Jong-Sub (Kang Shin Sung Il) raised his son alone. He lost his son in a car accident. Since the death of his son, Jong-Sub lived all alone. He retired from his job as a principle. Jong-Sub is then diagnosed with colon cancer and learns he has only 6 months left to live. All his desire to live is gone, but he still wants to keep his dignity. Jong-Sub tries to hire a caregiver. A woman named Yeon-Hwa (Bae Seul-Ki) comes to him. She is beautiful, but looks sad. Watching Yeon-Hwa, Jong-Sub sees his dead wife. He is shaken by her and wants to live more with her. Jong-Sub realizes he loves her and faces a truth he can't believe.

A quiet campsite. Some of the campers here disappear. One day, two sisters Eugene and Yeong-ok come to the campsite to camp. The owner, who cuts and eats raw, dripping meat, takes an interest in the sisters who are camping. The owner, Mansu, kindly takes care of the food separately and tells her to come home and use it comfortably instead of the messy public toilet. The older sister who drank and fell asleep with the purpose of having fun, but when morning came, only her younger sister Eugene remained in the tent, and her older sister Yeong-ok disappeared. Yeong-ok, who is captured and imprisoned by the owner, eats only raw meat without missing a single meal, and her sister Eugene, who is left alone, begins to tremble in fear.

A young couple, Wan-jin and So-hee, are living with Wan-jin's single father, Seok-bong. Seok-bong was preying on his daughter-in-law, who was doing the housework and preparing meals for him while her husband was away at work. He pretended to have dementia and attacked her. So-hee, who was suffering from her shame, suggested to Wan-jin to hire his father a caregiver, saying that his father seemed to be suffering from dementia, and so Bok-ja, a sexy and voluptuous caregiver who was about Seok-bong's age, came in. Seok-bong is captivated by Bok-ja's passionate charm and soon begins to share his love with her, and in this way, she takes the place of Wan-jin's new mother.

Hyeon-soo's younger brother Kang-tae visits the house of Hyeon-soo and Min-jeong, who are enjoying their honeymoon. Min-jeong is in favor of a kind Kang-tae. Kang-tae consults his junior, Na-hee, that he seems to like his sister-in-law. Na-hee says to get over himself, but Kang-tae actively seduces Min-jeong...

Sheina Yu and Reina Castillo date a man who likes to have sex anytime and anywhere. See who can keep up with his strong sexual appetite and be his girlfriend.

A couple arrive by boat to a small fishing village where women dive for seafood. He is returning from a trip and he brings his latest girlfriend, a former hostess, with him. This causes jealousy with a local diver, a woman he had relationship with before he left. Meanwhile the other female divers find ways to satisfy themselves after a hard days work.

Ho-je remarried Hyeon-ah. He thinks wives and girlfriends are different things and refuses to sleep with Hyeon-ah. Although she's upset, she keeps it in for the sake of his wealth and comforts herself with hosts, but she's still feeling empty inside. Meanwhile, Ho-je's daughter Ho-yeon feels something strange between her boyfriend Joo-cheol and Hyeon-ah and offers Hyeon-ah 50 million won for sleeping with her father. Hyeon-ah thinks this is the perfect chance to get rid of Ho-je's girlfriend and accepts but...

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.

While looking for a job, Min-hee lands a position as a secretary in a detective's office. However, she doesn't have much work. While Min-hee is consulting her brother's love interest with her detective, a case has been assigned to her. The detective thinks it's just love counseling and gets caught up in a case while investigating why they broke up.

Dong-gook, who is thinking of remarrying, introduces his stepmother Kyeong-sook to his son Jin-yeong. At the family gathering, Jin-yeong is surprised to see his stepmother's younger brother Hyeon-sook who was his one-night stand just a few days ago! Jin-yeong and his stepmother is lying down, drunk. Meanwhile, there is a strange atmosphere between Dong-gook and Hyeon-sook, who were drinking alone, and at that moment Jin-yeong's girlfriend Joo-yeon appears drunk.

Mixed-up model and bar hostess Kotoko sleeps with her coworker Genki, but can't seem to let herself sleep with the guy she really likes.