UPDATE: Now the English translated lyrics are available.
Credit: xFictionShadowMV1
Eng Translation Credit : pop!gasa
Kim Bo Hyung (김보형) [Spica] – I Miss You (그리워) FMV (Jackpot OST Part 2)
[Eng Sub + Rom + Han]
Credit: asianOST
김보형 (Kim Bo Hyun) – 그리워 (I miss you)