There is a 15 year old girl named Choi Soo Yeon who is a disabled her whole life. She was born with a disability called Cerebral Palsy and she is the second oldest kid in the orphanage. One day a group of four girls came into the orphanage wanting a teen girl. Sooyeon was in the music room of the orphanage playing the piano while singing/rapping Boombayah by Blackpink, Sooyeon is a blink which is Blackpink's fandom name. As Blackpink is looking for the right teen girl, Lisa and Rose heard music coming from the music room where they found Sooyeon in her wheelchair playing the piano while singing/rapping Boombayah.