“U”는 안부 한마디로 시작해, 누군가의 하루를 조금 더 좋게 만들고 싶은 마음을 담았습니다. Composed by 정우석, Swimgood, Siixk Jun Lyrics by 정우석 Arranged by Swimgood Guitar 추병준 Drums GiiANA Synth Lennon Background Vocals 정우석 Digital Edited by 온성윤 Mixed by Swimgood Mastered by 권남우 @821 Sound Mastering [Credit] Executive Producer UNDFND @official_undfnd Producer TKO, Elapse Marketing Planning TKO Promotion & Marketing Jeonga Oh A&R Seungyong Beag Administration Director Byungwon Kang Presented by UNDFND