"비밀"은 비밀스럽게 만나는 이성과의 관계를 알리고 싶어하는 남자의 이야기 입니다. 그 동안 메모해둔 스토리와 단어들을 바탕으로, 귀여우면서도 직설적이게 표현한 곡 입니다.■ 크레딧Executive Produced by 정한솔Produced by NAGO, PrinCyComposed by NAGO, PrinCyArranged by NAGO, 정한솔Lyrics by PrinCyRecorded by NAGO, Mystery, 2Jay at 87Sound StudioMixed by Mystery, 정한솔 at 87Sound StudioMastered by BoostknobPromotion & Artist Management Director 정한솔Strategy Planning charrrrls(최일수)A&R charrrrls(최일수)Artist Management 2Jay, Marco(신재현)Marketing & Online Promotion charrrrls(최일수), Marco(신재현)Art Direction & Design by hyonni(김나현) of UWPhoto Q.graphy(정창규)Beauty Director hyonni(김나현) of UW