안녕? [Credits] Produced by 김주찬(J-sus) Composed by 김주찬(J-sus) Lyric by 송진호(Envoy) Arranged by 김주찬(J-sus) Rap by 송진호(Envoy) Guitar by 윤민영 Artwork by 박주영 Mix & Mastering Engineer by 김주찬(J-sus)