An Affair: A Dangerous Sexual Play

Jeong Mi-rae has had an outstanding ability in writing since she was young. She's realistic and she gets a lot of job offers. However, this is only when she was young and now that she's been at it for 10 years, she doesn't get as much work as she used to. Now, she gets offers for adult comics or erotic movie scenarios. She starts working on them so that she can make a living but as realistic as she is, she needs to experience eroticism herself to write anything about it. She tries out different positions on her own and even on younger men who are easy to seduce. However, the production company doesn't like what she wrote and Mi-rae's ego is hurt. So, she plans doing something that will surprise them.

The Sister Next Door is a Korea Erotic movie and a little bit comedy. The story is about an Korean material girl nowadays. She love to sleep, to shopping, to party, and selfie too. The house next door is home of a teenager, who love to look through the windows, and capture all the moments into his phone. He use his videos to blackmail her. But later, the girl know how to use his weapon to beat him down. He seduce him to drunk and capture back all the funny and shameful things of him.

Min-seok has a crush on a regular customer. His crush evolves into love that eventually devolves into a dangerous obsession. When his crush fails to come to the cafe, he becomes increasingly worried and sneaks in to check on her and kidnaps her.

Hee-ran was a karaoke mistress when she first met Se-min through a marriage consultant company. He suggests they should have a contract marriage; she would get paid every month for being his wife and Se-gyu's mother. Hee-ran thinks this is a good deal but unlike her thoughts, being married is boring. Se-min only needs her at night and Se-gyu has a crush on Hee-ran who is like an older sister but hides it by being nasty. One day, Hee-ran meets Se-min's friend Tae-yeong and falls for him. In the end, Hee-ran and Se-min break up...

Jin-hee (Yoon Seol-hee) meets married man Min-ki (Hong Seok-yeon) on an online meeting site to make a living for herself and her incompetent boyfriend. She meets him for money but they slowly fall into something more than just a physical relationship. One day, a rumor spreads that she's a whore and breaks up with her boyfriend. With the betrayal for her boyfriend and love for Min-ki growing deeper, Jin-hee decides to put everything in the past and go abroad. The day before she leaves, she goes to meet Min-ki for the last time...