GB9 - 영원히 영원히 (Forever Forever)
GB9 - 그대의 숨결 (Your Breath) (OST Moon in the day Part.4)
GB9 - 언팔로우 (Unfollow)
GB9 - 거짓말은 하기 싫었어 (Empty Words)
GB9 - 사랑이 늦어서 미안해 (I'm sorry that my love was just so late)
GB9 - 지금처럼만 (Just the way you are) (With LYn)
GB9 - 모든 계절은 너였다 (All Seasons Were You)
GB9 - 비춰줄께 (Shine) (OST Rooftop Prince Part.3)
GB9 - 나를 잊지 말아요 (Please Don't forget me) (Webtoon 'Discovery of Love' X GB9)
GB9 - 좀 더 안아줄 걸 (After You've Gone)