Seo In Guk - Out of time

Seo In Guk - All For You (feat. Jeong Eun-ji)

Seo In Guk - Distant Fate (아득한 먼 훗날 우리가)

Seo In Guk - 너랑은 뭐든

Seo In Guk - Loved You

Seo In Guk - Fallen

Seo In Guk - Even If There's No Miracle (기적은 없어도)

Seo In Guk - I Can’t Live Because Of You

Seo In Guk - Mint Chocolate (feat. 40)

Seo In Guk - Flower

Seo In Guk - Seasons Of The Heart

Seo In Guk - Star

Seo In Guk - Better Together

Seo In Guk - No Matter What

Seo In Guk - Youth (어린 날)

Seo In Guk - Bad

Seo In Guk - With Laughter Or With Tears

Seo In Guk - At First Sight (feat. Beckah of After School)

Seo In Guk - Bomtanaba

Seo In Guk - Broken

Seo In Guk - Calling You

Seo In Guk - Finding Myself

Seo In Guk - I like you

Seo In Guk - Like a Fool

Seo In Guk - My Baby U (애기야)

Seo In Guk - Right Now

Seo In Guk - Aegiya

Seo In Guk - BeBe

Seo In Guk - Deep Inside My Heart

Seo In Guk - Just The Way We Love (feat. Jung Eunji)

Seo In Guk - Last Birthday

Seo In Guk - Mint Chocolate

Seo In Guk - Our Love Like This (feat. EunJi from Apink)

Seo In Guk - Shake It Up

Seo In Guk - Tease Me

Seo In Guk - Why Are You Smiling?

Seo In Guk - Winter Propose (feat. Sung Si Kyung, Park Hye Shin, VIXX, Yeo DongSaeng)