혈액형이 뭐에요? Artist Mudd the student Executive Producer San Yawn Producer Mudd the student Writer Mudd the student, Chang Kiha Mixed by Greg Freeman, JNKYRD Mastered by Norman Nitzsche Creative Director San Yawn Artwork Design & Photography by Chanhee Hong Illustration by Chanhee Hong Photographer Taemin Ha Stylist Yeyoung Kim Hair, Make Up eN (SAVEWAVE) Marketing & Editor Henson Hwang A&R Abyss Management 임대규 김재영 (DOOROODOOROO ARTIST COMPANY) Released by Balming Tiger