正式专辑《游乐场》公开的第三首歌曲《YAHO》没有你的这段日子，我的心情YAHOCreditsProduced by 화자(HWAJA), BoyOnTheKeysLyrics by 화자(HWAJA), BoyOnTheKeysComposed by 화자(HWAJA), BoyOnTheKeysArranged by BoyOnTheKeysChorus by 화자(HWAJA)Guitar by 임문혁Bass by 이환Piano by BoyOnTheKeysSynthesizer by BoyOnTheKeysRecorded by 화자(HWAJA) @Let's Play StudioDigital Edited by 김호진 @mplus.studiosMixed by BoyOnTheKeysMastered by 권남우 @821 Sound MasteringArtwork 성연성