A Knowing (남자의 정석) (Feat. Boi B) ko
A Song For You (그댈 위한 노래) ko
Alone (혼자) ko
Angel ko
Are You Happy Now ko
Autumn Breeze en
Because I Love You ko
Because I’m Alone ko
Because of You ko
Day and Night ko
Decision To Leave (헤어질 결심) ko
Fade Away (지워져) ko
For SPY (갈 곳이 없어) ko
I I YO ko
I Love You ko
I Loved… Have No Regrets ko
I Wanna Be With You ko
I Will Stay With You (나를 보며 살아갈 수 있도록) ko
If You’re Gonna Be Like This (이럴거면) ko
I’ll Talk to You (The Moon During the Day) (지금 말해볼게요 (낮에 뜨는 달 X 거미)) ko
Let's Play (feat. Park Yoo Chun of JYJ) ko
Love Song (노래해요 그대 듣도록) ko
Love This on (나갈까) ko
Loveholic ko
Loving You Back ko
Luving u ko
Lying (feat. Loco) ko
Most Perfect Days (가장 완벽한 날들) ko
My Love ko
Only One (Feat. Big Brother) ko
Raindrops (빗방울) ko
Regret (그래도 사랑이었잖아) ko
Remember Me (기억해줘요 내 모든 날과 그때를) ko
Rollin’ Around with You (너와 걸은 거리) ko
Room Service ko
Serendipity (우연히 그대) (With Kyuhyun) ko
Snowflake ko
Special Love (With Wheesung) ko
Stop Talking (그만 말해) (Feat. Cheetah) ko
The Only Thing I Can’t Do (해줄 수 없는 일) ko
Tip for Love (키스 이건 팁) ko
To You, My Beloved (Feat. Daesung) jp
We Should’ve Been Friends ko
Would you love me (사랑해주세요) ko
You Are My Everything ko
You Are My Everything en
Your Day (너의 하루는 좀 어때) ko
You’ll Think Of Me ko
You’re Calling Me ko
ゴメンネ (I'm Sorry) (Feat. TOP) jp
갈 곳이 없어 (Nowhere To Go) ko
구르미 그린 달빛 ko
남자라서 (Because You're a Man) ko
사랑은 없다 (There is No Love) ko