In "I Have a Lover" Kim Hyun Joo learned that she had been a twin.
On the 24th episode of SBS "I have a Lover" (script Bae Yoo Mi, director Choi Moon Suk) broadcast on October 17th, Do Hye Kang (played by Kim Hyun Joo) learned from Baek Suk (played by Lee Kyu Han) that she was a twin at birth.
On this day, Baek Suk confessed to Hye Kang who was Hye Kang and who was not Hye Kang. Here, she said, "The person that you remembered at the service station is my younger sibling. Yong Ki still doesn't know. If you find out that you were shocked instead of this, I thought you'd be really shocked. That's why I couldn't say anything" she revealed.
At this, Baek Suk said, "My mother lives in Boo Am Dong. Do you want to go there? I have a nephew too. You don't know how cute he is. So go. Go and meet your real family members. Go back to your neighborhood and find your house there" he said.
Hye Kang cried and as he took in his address, he made everyone feel unfortunate.
Meanwhile, "I Have a Lover" is about a woman who lost her memory met her husband that she hated. With that, she falls in love with him and at the end of a very destined meeting, she meets her long lost twin. With that, the lives of the two are reset.