Han Seo-ah

A female college student is working part-time at her father's laundromat business. One day she had an unusual laundry request: to have the laundry delivered to the customer's house. She carefully opens the door and enters the house, where she witnesses sex between a man, who appears to be the owner, and a woman. The female college student, who hides in the kitchen, watches the scene and is caught by the man while masturbating. A man who is having fun offers sex to her, who is in a state of excitement, and the atmosphere between them becomes luscious.

Myeong-hoon usually likes to go to massage shops, where he can even have sex with the masseuse. Then one day, her younger brother introduced him to the woman he would marry, and the woman who would become his sister-in-law was the masseuse he met recently at a massage shop! Myeong-hoon makes a secret proposal to the embarrassed woman, and she accepts it for the sake of her smooth married life, and their dangerous relationship begins.

Unsatisfied with her relationship with her boyfriend, Ji-hee receives a business trip massage through the introduction of her older sister, Mi-yeon. After that, Ji-hee falls in love and becomes obsessed with giving massage services to her on business trips.

When her husband, who is much older than her, dies, Hyo-jeong, a young mother who ends up living with her one-year-older stepdaughter, Joo-ah, decides to find a male helper. Each one of them brought a male helper, but the mother and daughter were fighting over which of the two they should hire. Eventually, they decided to pick both of them. Hyo-jeong and Joo-ah enjoy a pleasant sex life with their male helpers who match each other's styles. However, mother and daughter get tired of it quickly.

Yeong-tak and Ha-na are stepsiblings who live with the support of their divorced adoptive parents. The two begin taking individual private lessons for their respective careers. Yeong-tak secretly gives his acting teacher Na-ri sleeping pills to covet her body, while Ha-na is busy seducing her physical education teacher Han-cheol. Meanwhile, Na-ri and Han-cheol run into each other at the stepsiblings' house, fall in love at first sight, and seek revenge on the two who offended them.

Two women, Hae-na and Hee-na, prey on men under the pretense of marriage. One of these men is a doctor who falls for Hae-na and showers her with luxury gifts, but that's all he does. She can hardly get in touch physically with him. Meanwhile, Hae-na meets Ji-hoon, her former lover, again by chance, but after finding out about his relationship with Hee-na, the three decide to pursue money rather than love and start working for the men around them.

Hae-won is a wife who is pathologically obsessed with her husband. When her husband, In-seong, goes to work or is out of her sight, she constantly calls him and monitors his every move. One day, Hae-won invited her best friend, Song-joo, to their house to hang out, but she began to suspect that the relationship between Song-ju and In-seong was strange, and ends up threatening her best friend's life when she comes to clear up her misunderstanding.

Dong-sik and Jeong-mi, a married couple who run a multi-level company, make a huge amount of money through fraud, where they trick their victims using romance scams. The couple recruited Mi-yeon and Won-woo for the job. Later, Dong-sik and Jeong-mi develop feelings for Mi-yeon and Won-woo as the couple gets tired of each other. They begin relationships with their recruits by buying their favor with money.

Hee-jeong and his male colleague were locked up when the door is locked while they cleaning and organizing a warehouse. While they are still trapped, the male employee filmed her physiological phenomenon, and later used it as blackmail for him to covets Hee-jeong's body. He even demands 2-on-2 swapping with their other female colleague.

Jeong-cha is a sexless married man. Although he is married, he secretly likes his manager, who is the only hot spot in the company. One day, Jeong-cha discovers a strange relationship with her boss, and the manager learns that there is a secret contract between the two of them. Jeong-cha sticks around by her side to sign a contract with her manager.