Into My World & Let Me Out CreditsExecutive Producer 정의봉 Album Produced By 김박첼라All Songs Written & Composed & Arranged By 김박첼라 All Instruments By 김박첼라 Chorus By 김박첼라, 할리데이Recorded By 구자훈 At 109SoundMixed & Mastered By Fablus At Room Magnolia