Nothing Without You (Nth Romance) (너 없이 사는 게 (N번째 연애 X 허각)) ko
#BeginAgain (#떨려) (With Plan A Boys (플랜에이 보이즈)) ko
A Bride (없었던 것처럼) ko
Along the Days ko
Already Winter (벌써 겨울) (With VROMANCE) ko
Bada ‘Ocean.wav’ (바다)(With Jeong EunJi (정은지) (Apink)) ko
Beautiful Days (그들만은 아름답도록) ko
Because Of You ko
Best View ko
Break Up To Make Up/Let’s Stop Fighting Now (이제 그만 싸우자) ko
Confession (고백) ko
Cosmos ko
Don't Forget Me (나를 잊지 말아요) ko
Drinking (술이야) ko
Empty Words (흔한 이별) ko
Endless ko
Farewell In Tears (눈물로 너를 떠나보낸다) ko
Fine (With Soyou) ko
Happy Me (행복한나를) (Feat. John Park) ko
Have A Good Time ko
Hello ko
How Did We (우린 어쩌다 헤어진 걸까) ko
I Can’t Go To Sinchon (신촌을 못가) ko
I Told You I Want To Die / I Can't Say Anything Else But I Want To Die (죽고 싶단 말 밖에) ko
Let You Go (이별은 늘 그렇게) (Duet. Jeong Eun Ji) ko
Loved You (사랑했다) ko
Memories (추억 한 줌) ko
Memory of Your Scent (향기만 남아) ko
Miss You (작은 온기) ko
Miss You (혼자, 한잔) ko
Oasis (오아시스) (With Apink & Victon) ko
One Person ko
Only You (바보야) ko
Rain (비가 내리기 전에) (With 2F) ko
Since I Met You (그댈 만난 이후로) ko
Snow Of April (사월의 눈) ko
Sob Your Heart Out (운다 운다) ko
Someday (그 시간, 그 공간) ko
Tell me why ko
The Last Night (마지막으로 안아도 될까) ko
The Work Of Erasing You (너 하나 빼는 일) ko
Time To Say I Love You (오늘만은 말할게) ko
Town Bar (동네술집) (With Jung In) ko
Under the Lonely Sky (하늘 아래 그대와) ko
Up All Night (feat. Basick) ko
Wind Story (그 바람 불면) ko
With You (물론) ko
Without You (듣고 싶던 말) ko
Your Warmth (너의 온기) ko
You’re the Reason (너란 이유) ko
너 아니면 ko