Seo-yeon is running a boarding house. She has a habit of changing men every quarter. Yeong-cheol, who was recently brought to the house is cute, but he tends to be clingy in relationships which makes her feel a little uncomfortable. When Yeong-cheol is away from home, he calls Min-soo to his house. Min-soo provokes Yeong-cheol when he knows how Seo-yeon feels. But Seo-yeon's mind is different... Who will win Seo-yeon's heart?
Three people clean up the house for Min-soo who is new to the house. Yeong-cheol, who has become close friends while living in one house, is obsessed with Seo-yeon because he does not like Min-soo. Seo-yeon knows the relationship between the two and has a strange confidence watching the fight between the two. The fierce fight between the two men trying to win the relationship with Seo-yeon before Min-soo enters the house! The story of the unknown end is just beginning.
Whenever she sees a messy kitchen, she calls her childhood friend Min-soo. Min-soo, complains in words but still brings side dishes to Seo-yeon. They're friends, but sex partners. Seo-yeon's relationship with Min-soo from their young age is natural. Min-soo is worried about Seo-yeon. He is jealous of the relationship between his younger friend Yeong-cheol and Seo-yeon.
Hyun-ji and Jin-hee are university friends. One day, Jin-hee gets a call from her aunt in the suburbs saying that her son and Jin-hee’s cousin Seug-taek is going to stay with Jin-hee while he attends academy. When they and their friends see each other, they are drawn together.
Hae-jong
고등학생 시절, 밤마다 온갖 망상으로 잠 못 들게 만들던 섹시한 친구 누나. 집에서 알몸 차림의 누나를 우연히 마주친 이후 민수의 짜릿한 망상에는 점점 불이 붙는다. 어른이 된 이후, 민수는 친구 용준과 함께 누나가 일하는 회사에 취직하게 된다. 섹시한 친구 누나에서 이제는 섹시한 여상사로 재회한 그녀를 향한 민수의 은밀한 작업이 시작되는데…
