Ken (VIXX), Choi Sang Yeob - 그것만이 내 세상 (It's Only My World)
Ken (VIXX), Choi Sang Yeob - I Want To Fall In Love
Ken (VIXX), Choi Sang Yeob - 빗속에서 (In The Rain)
Ken (VIXX), Choi Sang Yeob - Never Ending Story