This is the PV of the song Betrayed by TaeGoon featuring Lee Joo Yun.
This is the link to the song:
http://www.imeem.com/groups/2tF-jia9/music/OcLHmYBu/taegoon-betrayed-sogattta-narration-of-lee-yo-won/
Album : 3rd Mini Album
Release date is September 17, 2009