Let's Go To The Rose Motel 4

Seong-soo hasn't had any physical contact with his girlfriend yet after 6 months of being together so he's always excited to see her. One day, Seong-soo succeeds in getting Min-ae into Rose Motel. When he is about to shower, Seong-soo discovers a small hole in the wall leading to the next room and watches the couple next door having intercourse. Seong-soo continues to watch out of curiosity but realizes he just watched celebrity Sara giving sexual favors to a big shot politician...

Campus couple Sang-yeol (Kim Myeong-joong) and Mi-na (Lim So-mi) are a married couple who maintain their living as a magazine reporter and pretty famous writer. Sang-yeol, who is always at home writing, has been in an affair with his neighbor and collegemate Da-yeong (Hwang Jeong-ah) for quite a while. Then one day, Mina runs into Da-yeong and exchanges phone numbers. Mina starts to suspect the frequent phone calls to her husband from an unknown number. She finds out Da-yeong is the one he's been cheating on her with but she isn't upset. Da-yeong's husband Hyeon-woo (Lee Hyeon-gook) had once dated. One day MIna meets Hyeon-woo coincidentally through work and seduces him. He falls for her and the complicated relationship begins...

Chan-ho (Lee Jong-joon) is a playboy who is obsessed with Jae-hee (Seo Yeon-joo), although she won't allow him physical affection unlike other girls. He tries everything but she doesn't give in. Then one day, Jae-hee opens up and they have sex, but there's nothing but physical pain and agony for her. She then hears that Chan-ho has been cheating on her with someone else and she decides to take revenge.