마지막 날에 처음으로 본 빛 Credit Produced by heyden Song by heyden artwork by Dahyun Yoo composed and arranged by heyden,Ian airplane Mixed by Andnew @salpotstudios 살폿스튜디오 Mastered by Takahiro Uchida（FLAIR MASTERING WORKS） A&R Jinwoo Kang, June