Ji Jinseok (지진석; also simply as Jinseok, born August 18, 1998) is a South Korean singer under Black Y Music. He is former participant of the survival show Under Nineteen. He left the show on January 26, 2019 due to health reasons. He made his solo debut on June 3, 2019 with the single "Good Night". Official links Instagram: @by_jinseok Twitter: @JINSEOK_JI_ V Live: https://channels.vlive.tv/B61923/