Yoo Su Ah, known simply as Sua, is a South Korean singer and leader of the girl group CSR or Cheotsarang (which literally means "First Love") under Pop Music. The group is composed of 7 members and all are born in 2005. She became the first trainee to join the agency and became the leader when the group debuted on July 2022 with the EP "Sequence: 7272". (Source: Korean = Namu Wiki || Translation = MyDramaList) Watch drama online for free.