어린 여름날,
이룰 수 없었지만 찬란했던 첫사랑의 기억
‘긴 머리(Unforgettable)’


Lyrics by 박정근
Composed by 박정근
Arranged by 박정근

Acoustic Guitar by 김의주
Piano by 강상희
percussion by 윤두호
Cello by 이진영
Violin by 이선미