On September 28 episode of KBS' reality show 'Trio's Childcare Challenge', singer Hwang Chi Yeul was seen visiting his friend's house to help him with childcare for a day.
Hwang Chi Yeol looked after the friend's two sons from early morning until evening.
![Trio's Childcare Challenge](http://img.sbs.co.kr/newimg/news/20190930/201359355_1280.jpg)
Then, he looked at his friend and said, "Wow, your wife is so pretty."
While she shyly laughed, the friend explained, "Back when she, Ji-yoon, was in high school, her nickname was 'Gunpo Han Hyo Joo'."
He continued, "Ji-yoon used to be a flight attendant. She quit after giving birth to our first child though. Until recently, she stayed at home raising the boys. She works again now."
![Trio's Childcare Challenge](http://img.sbs.co.kr/newimg/news/20190930/201359358_1280.jpg)
![Trio's Childcare Challenge](http://img.sbs.co.kr/newimg/news/20190930/201359357_1280.jpg)
Soon after this episode was broadcast, it was soon discovered that the wife was JISOO's older sister.
After that, a lot of people commented, "Good genes run in JISOO's family for sure.", "I can see some resemblances, but she definitely is beautiful in her own way." and so on.
![Trio's Childcare Challenge](http://img.sbs.co.kr/newimg/news/20190930/201359356_1280.jpg)
(SBS Star)