"비밀"은 비밀스럽게 만나는 이성과의 관계를 알리고 싶어하는 남자의 이야기 입니다. 그 동안 메모해둔 스토리와 단어들을 바탕으로, 귀여우면서도 직설적이게 표현한 곡 입니다. ■ 크레딧 Executive Produced by 정한솔 Produced by NAGO, PrinCy Composed by NAGO, PrinCy Arranged by NAGO, 정한솔 Lyrics by PrinCy Recorded by NAGO, Mystery, 2Jay at 87Sound Studio Mixed by Mystery, 정한솔 at 87Sound Studio Mastered by Boostknob Promotion & Artist Management Director 정한솔 Strategy 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 UW Photo Q.graphy(정창규) Beauty Director hyonni(김나현) of UW