The rooftop seems suffocating because all the windows have been blocked by other buildings. Every night women from next door can be seen through the windows?! Jae-min moves into the rooftop across from school but is disappoointed that all the windows have been blocked by other buildings. However, he learns that every night he can see the neighboring women from the other building! Something exciting goes on one night in that rooftop which has the greatest ‘view’ ever!
Motel Cactus consists of four episodes, all of which take place in Room 407 of Motel Cactus, a love hotel in Seoul: (1.) A girl celebrates her birthday with her boyfriend, because it is the only place she feels entirely secure with him. (2.) A student has rented room 407 for several hours to shoot a scene with a girl for his video film, a college project. (3.) A salesman meets a woman in a bar. Both very drunk, they arrive in room 407. Afterwards he is back in the room, alone. (4.) He is soon joined by his old love from his college days. Both are vaguely hoping to rekindle their old relationship.
Joon-ha had the best night of his life with an older woman he met while drinking. He starts looking for her as he can’t forget the feeling and finally they meet. However, she’s going to become his new stepmom. She’s his father’s girlfriend. When the three start living together, things turn edgy and then dangerous when his father leaves the house one day.
Mi-yeon, who was adopted into her family when she was little, is living with her older sister, Si-yeon and Si-yeon’s husband. Mi-yeon’s desire towards her brother-in-law grows more and more every night when she gets to watch the affectionate interaction between her older sister and the brother-in-law. One day, Mi-yeon seduces her brother-in-law and the two end up crossing the line when they should not have. As the situation goes on, Mi-yeon finds out her older sister is also having affairs outside the marriage. Mi-yeon tries to clear up the relationship with her brother-in-law out of guilty feeling. However, she hears something shocking from the brother-in-law.
Deputy Hyeon-moo from Isang Plans doesn’t know a thing about manners. The company director orders the team manager to to hire a manner teacher for the sake of teaching the employees some manners. Then one day, a young woman (Yeo Min-jeong) introduces herself as the ‘manner teacher’. However, she was only visible to Hyeon-moo. From then on, whenever Hyeon-moo knocks on a door or does something with ‘manner’, she would appear and conduct a total directional lecture on manners. The two get close very quickly…