男主跟妻子新婚不久，远房表姐前来投奔，暂住家中，有了这个表姐的插足，夫妻俩的性生活出现了问题，神经质的表姐常常在男主跟妻子ML的时候闯进房间，让二人兴致全无，而风骚的表姐除了用电动玩具满足自己外，还常常勾引男主跟他ML，男主受不了这种生活，便找来了自己的单身好友，好友健壮无比，让表姐很满意，二人也建立起了性关系，谁知道没几天后，好友心力交瘁，而表姐还生龙活虎，似乎已经将男主的好友榨干了.

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 friend

The coquettish cousin squeezed the man dry

"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...