Kim Da-hyun said, "My Passbook is managed by me." In MBC King of Mask Singer' broadcasted on the afternoon of June 4, 15-year-old Kim Da-hyun, daughter of Kim Bong-gon and a trot singer, attracted attention. When Kim Da-hyun said, "My mother told me that I think puberty has come," Gim Gu-ra said, "When puberty comes, she asks me for a Passbook. The money I earned, I will manage it. Da-hyun is a filial daughter." Kim Da-hyun surprised everyone by saying, "I've been in charge since I was young." Gim Gu-ra said, "Kim Bong-gon is flexible." Kim Da-hyun said, "My mother's Father said, 'You worked hard, but I do not think your parents are taking it.'"