"누나가 전부 다 알려줄게!" 신혼부부와 사촌누나의 아슬아슬 기묘한 동거가 시작된다! 윤재는 회사에 새로 부임한 부사장이 새아버지의 조카인 현주라는 것을 알아본다. 마침 집을 구하고 있던 현주는 잠시만 얹혀 살게 해달라고 윤재에게 부탁하고, 윤재는 상사이자 사촌 누나인 현주의 부탁을 거절하지 못한다. 그렇게 시작된 윤재 부부와 피 안 섞인 사촌누나의 기묘한 동거. 그런데 사촌누나가 자꾸만 윤재 부부의 섹스 라이프까지 간섭하기 시작하는데...Shortly after the man and his wife were newly married, the distant cousin came to live at home temporarily. With this cousin's involvement, the couple's sexual life had problems. The Neuroticism cousin often broke into the room when the man and his wife were having sex, which made them lose their interest. The coquettish cousin, in addition to satisfying herself with a masturbator, often seduced the man to have sex with him. The man could not stand this life, so he found his single friends, My friend was incredibly robust, which satisfied my cousin very much. They also established a sexual relationship. Who knows, a few days later, my friend was exhausted, while my cousin was still lively and seemed to have drained the male lead's friendThe coquettish cousin squeezed the man dry