Ryu Soo Jung, born in Daejeon, is a former member of the girl group Lovelyz. In January 2015, she featured on the subunit Infinite H’s song “Bump” from Infinite H’s Fly Again album. In 2016, Ryu recorded The Beginning Of Love featured Brown Eyed Soul’s Young Jun. Ryu released Sunny Day for The Second Last Love soundtrack with Baby Soul.
In April 2017, it was announced that Ryu would be one of the main cast of KBS2 new web variety, “Idol Drama Operation Team”, and introduced herself as being in charge of musical instruments as she can play keyboards and guitar. On November 1, 2021, it was announced that Lovelyz will be disbanding on November 16. She decided to not renew her contract with Woollim