"Will you be spring?" [Credits] Executive Producer / Blackhouse Lyrics / 송양하,김재현,성훈 Composer / 송양하,김재현,성훈 Arranged / 송양하,김재현 Bass Guitar / 진현교 Acoustic & Elec Guitar / 홍두영,윤다훈 Piano / 김재현 String Arranged / 장석원 String / 융스트링 Recording / Vibe Music Studio Digital Editing / 정모연 @ Vibe Music Studio 606 Mixed / 곽정신 @ Vibe Music Studio 606 Mastering / 권남우 @ 821 Sound Album Cover Design / 팔구공