Will spring come someday..? -Def.- [Credit] Excutive Produced by Def. Lyrics by Def. Composed by Def. , noden , chillingcat , MIRROR BOY Arranged by Def. , noden , chillingcat , MIRROR BOY Guitar: Chillingcat, Noden Bass: Noden Drum: Chilling-cat Piano: Noden Mixed by Mirror Boy Mastered by 박경선 @ BOOST KNOB