Why Me, Sweetie?

In this romantic comedy, Dong has a mysterious amnesia that worsens every time he falls deeply in love. Because he can't remember details of his relationships, he also can't maintain the deep emotions he develops for a woman. However, persistent Ding cares for Dong so greatly that she decides to disguise herself as a new girl every time they meet. Will her ruse keep Dong interested until she can find a way to bring back his memories?