A sexual film about a younger sister who lives with her boyfriend before marriage and an older sister who opposes and monitors it.

The man owner is a car salesman. The sister of the fiancée just happened to buy a car, so she sold her a good car. Who knows that the sister of the fiancée is a coquettish woman. Some minor problems in the car called the male lead to repair. Even though the male lead had good stamina, he got on his sister’s bed under the stimulation of alcohol. Afterwards, the male lead regretted very much and felt sorry for his fiancee, but the elder sister got worse. For various reasons, forcing the male protagonist to be her tool for venting...

Ji-seon is living with her sister and her husband after a divorce. Her sister Ji-yeong leaves for a work trip and Ji-seon is at home all alone with her brother-in-law. The two can't hide their sexual passion and they cross the line. Every time Ji-yeong leaves, the two enjoy risky sex...