辛苦了，感谢有你在。生日快乐！ - 1. HBD2U (Feat. Leellamarz) - Lyrics by Rakon, Leellamarz Composed by SLO (슬로), Rakon, Leellamarz Arranged by SLO (슬로) Piano by SLO (슬로) Drum by SLO (슬로) Bass by SLO (슬로) Synthesizer by SLO (슬로) - Mixed by Stay Tuned @Stay Tuned Studio Mastered by 권남우 @821 Sound Mastering - Artwork by 616 A&R 616 Modeled by Cat Stylist Lee Onyoo -