Oh Jiyoung and Oh Younghee is identical twin sister, until all of the physical form same. Jiyoung is a strong girl. She's join basket, maraton, badminton and many more. As for Younghee, the twin of Jiyoung, she's lame. She's had suffocation complaint, make this girl must in home and she's can't some hard activities! Their Moma very cares about Younghee, not about Jiyoung. Maybe because Jiyoung's body more healthy than Younghee. They had a brother, them's brother was name Oh Sehun. But Sehun m