Overview
A sexless couple Eun-sook and Won-gil. Newlyweds Jong-beom and Na-jeong graduated from physical education. Jong-beom happens to be Eun-sook's personal health trainer and sex partner while working as a courier. Jong-beom introduces her wife Na-jeong as Won-gil's personal health trainer, and Won-gil receives sexual stimulation through Na-jeong. The two couples, who have been sleeping for a while, are boiling over and plan to have sex with each other...
| Actor | Age then | Age now | |
|---|---|---|---|
 | - | - | |
 | 38 | 42 | |
 | - | - |