Closer – 겨우 그 여자때문에 (Feat. 이레)
Track 01 from Single "Unknown : Part I (By Closer)"
Release Date: 2013.05.22
Closer – 눈물만 흘리네요 (Feat. 이시은)
Track 01 from Single "Unknown : Part 2 (By Closer)"
Release Date: 2013.12.05
Be One with Kpop - with Lyric
Track 01 from Single "Unknown : Part I (By Closer)"
Release Date: 2013.05.22
Track 01 from Single "Unknown : Part 2 (By Closer)"
Release Date: 2013.12.05