IU

Co-producer – 이종훈
Executive-Producer – 장현진
Executive-Producer [Production Director] – 김진명
Executive-Producer [Production Director] – 배종한
Lead Vocals, Chorus – 아이유
Mixed By – 강효민 (9)
Mixed By – 고승욱 (3, 10)
Mixed By – 고현 (5)
Mixed By – 손명갑 (1, 4, 6)
Mixed By – 윤정오 (7)
Mixed By – 조준성 (2, 8)
Mixed By [Assistant] – 김경환 (5)
Mixed By [Assistant] – 박은경 (7)
Mixed By [Assistant] – 선영 (3, 10)
Mixed By [Assistant] – 성영민 (7)
Mixed By [Assistant] – 이원경 (9)
Mixed By [Assistant] – 임광덕 (1, 4, 6)
Mixed By [Assistant] – 초자연 (2)
Mixed By [Assistant] – 최자연 (8)
Mixed By [Assistant] – 황민희 (2, 8)
Photography By – 목정욱
Producer – 아이유
Recorded By – 강효민 (9)
Recorded By – 김형진 (10)
Recorded By – 서동광 (10)
Recorded By – 손명갑 (1 to 8, 10)
Recorded By – 오성근 (3, 10)
Recorded By – 윤정오 (7)
Supervised By [Executive Supervisor] – 김영석

Fourth studio album by IU.

Tracks 1, 4, 6 Recorded and mixed at LOEN
Tracks 2, 8 Recorded at LOEN; Mixed at W Sound
Track 3 Recorded at LOEN & T Studio; Mixed at Bono Studio
Track 5 Recorded at LOEN; Mixed at Koko Sound Studio
Track 7 Recorded at LOEN, Stradeum, Lead Sound; Mixed at Stradeum, Assistance at Lead Sound, Stradeum
Track 9 Recorded and Mixed at Bricwall Sound
Track 10 Recorded at LOEN, T Studio & 서경대학교 녹음실 ; Mixed at Bono Studio

Distributed by LEON Entertainment, Inc. Manufactured by Seoul Media, Inc. 2017.04.
Made in Korea

Barcode – 8 804775 080043
Barcode (Scan) – 8804775080043
Matrix / Runout – L100005326 E 170419
Mastering SID Code – IFPI LA71
Rights Society – KOMCA