You've Fallen for Me/Heartstrings OST

01. 모르나 봐 (I Don't Know) - M Signal
02. 그래 웃어봐 (So Give Me A Smile) - M Signal
03. 친구로만 알았는데 (Not Just Friends) - Oh Wonbin
04. 꼭은 아니더라도 (Even if it's not necessary) - FT Island
05. 그리워서...(I Miss You) (Band Ver.) - Yonghwa (CN Blue)
06. 모르나 봐 (I Don't Know)(Inst.) - M Signal
07. 그래 웃어봐 (So Give Me A Smile) (Fusion Ver.) - M Signal
08. The Battle Of Life
09. 비제를 위하여 (Right Or Wrong)
10. 슬픈 사생결단