After Jae-won goes back to school, he can't find a place to stay so he ends up renting out a room in his mother's friend Hee-jae's house. Hee-jae's daughter Yoon-young has grown up to be a mature young lady. One day, Yoon-young uses school exams as an excuse to stay over with her boyfriend and Jae-won brings his girlfriend to the house. Hee-jae thinks something is going on and interrupts. Meanwhile, Yoon-young is not entirely happy with sex with her boyfriend and has other thoughts when she sees Jae-won. She starts seeing him as a man. In the end, she calls him to her room in the middle of the night...

男主是一名学渣，复读了几年都没有考上大学，英语偏科严重，恰好妈妈的朋友从美国留学回来，便成为了男主的辅导老师，寄宿在男主家里，然而色眯眯的父子俩都对这个妈妈的朋友很感兴趣，夜里两人竟然同时溜进她房间，发生了尴尬一幕，而父子俩也各自对妈妈的朋友展开攻势，而父亲如愿以偿，男主只能靠意淫，终于，妈妈的朋友在决定搬走之前，满足了男主一直梦寐以求的愿望....

男主刚退伍回来，没有找到住处，记住在阿姨家里，阿姨跟表妹都是两个放荡的女人，对男主的成熟健壮的身体非常喜欢，表妹肤白貌美，一双大长腿非常撩人，她意外发现男主在打飞机后，幻想出兄妹两人极度羞涩的乱伦性爱，而就在两个女人对男主垂涎不已的时候，男主竟然带来了自己的女友，这让阿姨非常嫉妒，她决定必须迈出一步，跟男主发生关系…