Surferboy [Yeah !] Yeah ! [Credit] Lyrics by Seungwook Composed by Seungwook, 박봉원 Arranged by Seungwook, Bryan Sik MIDI Programming by Seungwook Guitar by 박봉원 Bass by Bryan Sik Chorus by Seungwook Recorded by Seungwook @SEOM Mixed by Seungwook @SEOM Mastered by 신재민 Shin Jaimin (필로스플래닛 Philos’ Planet) Album Cover Artwork by 정선보 (@sunbo7)