[Credit] 　　1. 삼켜 　　Lyrics by Bryn, SINCE 　　Composed by Bryn, SINCE, nomichod, no2zcat, Sutt, pac odd 　　Arranged by nomichod, no2zcat, Sutt, pac odd 　　BGV by Bryn, SINCE 　　All instruments by nomichod, no2zcat, Sutt, pac odd 　　Mixed by 이청무 @Studio505 　　Mastered by 권남우 @821Sound 　　2. BACKSPACE 　　Lyrics by Bryn, SINCE 　　Composed by Bryn, SINCE, no2zcat, Sutt, pac odd 　　Arranged by no2zcat, Sutt, pac odd 　　BGV by Bryn, SINCE 　　All instruments by no2zcat, Sutt, pac odd 　　Mixed by 이청무 @Studio505 　　Mastered by 권남우 @821Sound 　　EXECUTIVE PRODUCER | Bryn, SINCE 　　A&R | THOMAS LEE, EUNJI JEONG, YICHANG KIM, KYEONGMIN SON 　　MANAGEMENT | LJ, KIWON PARK 　　DESIGN | LAUNDRY OFFICE 　　PHOTO | EUJIN KIM 　　MUSIC VIDEO | EASTFILM, MATERIAL 　　CONCEPT FILM | HANNAH 　　STYLING | DOOMER FIT 　　HAIR & MAKEUP | Ha Eunbin, Ahn Hyesoo