O.O.O (오오오) [푸른달, 잘 듣고 있지?]푸른달, 잘 듣고 있지?[Credit]1. 푸른달, 잘 듣고 있지?Written by 가건우, JoyminComposed by JoyminArranged by 가건우, 고도연, 장정호, JoyminRecorded by 박슬기(20Hz) @20HzStudio Digital Edited by 박슬기(20Hz )@20HzStudio Mixed by 박슬기(20Hz) @20HzStudio Mastered by 박슬기(20Hz) @20HzStudio Artwork Design by woongzy