Ji-eun was having a hard time because of her different taste in sex with her husband. She talks to So-hyeon next door about this and she suggests and new kind of 'sex therapy'; to switch husbands for a week.
| Actor | Role |
|---|---|
| YYoo YooJi-eun | Ji-eun |
 Do Mo-seYoung-jin | Young-jin |
| KKim Min-joo-IISo-hyeon | So-hyeon |
| CChoi Yeong-binSeung-cheol | Seung-cheol |
 Jung Jae-sikChief | Chief |
 Lee SooBeauty | Beauty |