영훈(정현우)은 회사동료이자 빼어난 미모로 사내 뭇 남성들의 시선을 한 몸에 받고 있는 유부녀 미란(소영)에게 이상한 끌림을 느낀다. 지속적으로 미란에게 대시한 영훈은 마침내 미란과 뜨거운 정사를 나누게 되고 그녀의 매력에 끝없이 빠져들고 만다. 어느 날, 미란의 집에 찾아간 영훈은 영상 메시지를 받게 되는데… 그것은 바로 미란 부부가 섹스파트너로 영훈을 이용했다는 충격적인 내용. 이후 영훈에게 미란의 남편 정욱(장태산)이 연락을 해 자신들의 게임에 동참할 것을 제안하고, 고민하던 영훈은 결국 그 제안을 받아들인다. 영훈은 미란을 향한 감정과 욕망 사이에서 갈등하게 되고 정욱에게 미란을 사랑하니 놔달라고 요구한다. 이에 정욱은 그녀를 얻을 수 있는 한 가지 제안을 한다. 그것은 바로 자신의 앞에서 미란과 섹스를 하는 것. 영훈은 그 제안을 받아들이고 정욱 앞에서 미란과 섹스를 시작하지만 중간에 포기하고 마는데… 이에 정욱은 테스트를 통과하진 못했지만 미란을 떠날 것이라고 말하며 사라진다.

Yeong-hoon realiseert zich dat hij zich vreemd genoeg aangetrokken voelt tot Mi-ran, een getrouwde vrouw, die een van zijn collega's op het werk is. Yeong-hoon blijft constant met haar flirten en hij eindigt uiteindelijk met een gepassioneerde seks met Mi-ran. Op een dag ontvangt Yeong-hoon een schokkende videoboodschap wanneer hij het huis van Mi-ran bezoekt. De video informeert hem dat het stel van Mi-ran Yeong-hoon als hun sekspartner heeft gebruikt. Mi-ran's echtgenoot, Jeong-wook, nodigt hem uit om mee te doen aan hun spelletjes. Yeong-hoon kan niet kiezen tussen zijn liefdevolle emotie voor Mi-ran en zijn verlangen. Yeong-hoon zegt immers tegen de man dat hij haar moet laten gaan, omdat zij verliefd is op Mi-ran. Jeong-wook accepteert zijn verzoek onder één voorwaarde, namelijk dat Yeong-hoon seks moet hebben met Mi-ran in het bijzijn van Jeong-wook. Yeong-hoon accepteert de suggestie en begint seks te hebben met Mi-ran in het bijzijn van Jeong-wook, maar hij stopt in het midden.

Yeong-hoon realizes that he is strangely drawn to Mi-ran, a married woman, who is one of his colleagues at work and adored by many men. Yeong-hoon keeps flirting with her constantly and he finally ends up having a passionate sex with Mi-ran. He becomes deeply drowned into her allure. One day, Yeong-hoon receives a shocking video message when he visits Mi-ran’s house. The video informs him that Mi-ran’s couple has been using Yeong-hoon as their sex partner. Mi-ran’s husband, Jeong-wook invites him to join their games. Yeong-hoon cannot decide between his loving emotion for Mi-ran and his desire. Yeong-hoon after all tells the husband to let her go, because he is in love with Mi-ran. Jeong-wook accepts his request under one condition, which is that Yeong-hoon should have sex with Mi-ran in front of Jeong-wook. Yeong-hoon accepts the suggestion and starts having sex with Mi-ran in front of Jeong-wook, but he stops in the middle.

小林和阿红在大学时代是一对恩爱情侣，毕业后各分东西。但多年后， 他们恰为一家公司同事，两人旧情复燃，尽管他们都已有了爱人。所以他俩决定只做一对「周末夫妇」，但遇到重重阻挠，最后为了对方的幸福，长谈并尽情床第性爱淫欢后，决定分手……