For the singer Kim Yeon Ja and composer Lee Ho Seob special, Youngjae dedicated his performance to his mother and covered her favorite song by Kim Yeon Ja, the 1984 track "Mercury Lamp". He expressed, "I worried whether I could fill in the space of 7 members by myself, but I was in a good mood after I received this song. My mother likes this song. I listened to her advice about it," revealing his mom produced his performance and not J.Y. Park.