1Long-loop Feedback
2Atheism
3Reminiscence
4Long-loop Feedback (inst.)
5Atheism (inst.)
6Reminiscence (inst.)
signal transduction
Long-loop Feedback
Visible Light
Chromosomal Reprogramming
Evanescence
1A Fateful Love (feat. HEXAGON) (Inst.)
21학년 14반의 사랑꾼들 (feat. 상승만) (Special Version)
3내 사랑 받아줘요 (feat. HEXAGON)
4Love Letter Boy (feat. 김준기)
5My Heart is just beating for you (feat. 조용연)
6청혼가 (feat. 신용진)
7LOVE YOU (feat. 양희민)
8첫 번째 설레임 (feat. 김지훈)
9사랑해 그대를 (feat. 김기백) (Observer Version)
10사랑해요 (feat. 김지연) (My 1st Lover Version)
