Song Ha-young, known mononymously as Hayoung, is a South Korean singer, songwriter and dancer under ASND. She is a member of the girl group fromis_9, formed through the reality survival show Idol School (2017). Song Ha-young, known mononymously as Hayoung, is a South Korean singer, songwriter and dancer under ASND. She is a member of the girl group fromis_9, formed through the reality survival show Idol School (2017).