서인국, 정은지 – 커플 (Couple)
Track 01 from Single '커플 (Couple) - Special Single'
서인국 – 너랑은 뭐든
Track 02 from Single '2024 SINGLE ALBUM [SEO IN GUK]'
서인국 – Out of time
Track 01 from Single '2024 SINGLE ALBUM [SEO IN GUK]'
서인국 – 너를 좋아해
Track 01 from Single "미남당 OST Part.6"
Release Date: 2022.08.09
서인국 – 질리지 않는 노래
Track 02 from Single "LOVE&LOVE"
Release Date: 2022.06.14
서인국 – MY LOVE (Feat. RAVI)
Track 01 from Single "LOVE&LOVE"
Release Date: 2022.06.14
서인국 – 달려와 (With Bigtone) (Rally Ver.2)
Track 01 from Single "달려와"
Release Date: 2009.10.30
서인국 – Brand New Day
Track 04 from EP "Perfect Fit"
Release Date: 2012.04.12
서인국 – Time Machine (Feat. 스윙스)
Track 03 from EP "Perfect Fit"
Release Date: 2012.04.12
서인국 – 밀고 당겨줘 (Tease Me)
Track 02 from EP "Perfect Fit"
Release Date: 2012.04.12
서인국 – Bad
Track 01 from EP "Perfect Fit"
Release Date: 2012.04.12
서인국 – 너 라는 계절
Track 01 from Single "너 라는 계절"
Release Date: 2016.03.08
서인국, 정소민 – 별, 우리
Track 01 from Single "하늘에서 내리는 일억개의 별 OST Part 2"
Release Date: 2018.11.08
서인국 – 꽃
Track 01 from Single "내일 그대와 OST Part.1"
Release Date: 2017.02.11
서인국 – BeBe
Track 01 from Single "BeBe"
Release Date: 2016.12.28
서인국 – 너 땜에 못살아 (Feat. 버벌진트)
Track 01 from Single "Y.BIRD From Jellyfish With 서인국"
Release Date: 2013.02.04
서인국 – Take
Track 01 from Single "Take"
Release Date: 2010.11.22
서인국 – Broken
Track 01 from Single "Broken"
Release Date: 2011.03.31
서인국 – 돌아오는 길
Track 01 from Single "고교처세왕 OST Part.4"
Release Date: 2014.07.21
서인국 – 봄 타나봐 (BOMTANABA)
Track 01 from Single "봄 타나봐 (BOMTANABA)"
Release Date: 2014.05.14
정은지, 서인국 – 우리 사랑 이대로
Track 01 from Single "응답하라 1997 Love Story Part 2"
Release Date: 2012.09.04
서인국 – 겁도 없이
Track 01 from Single "주군의 태양 OST Part.7"
Release Date: 2013.09.17
서인국 – Shake It Up
Track 01 from Single "Shake It Up"
Release Date: 2011.08.10
서인국 – 아득한 먼 훗날 우리가
Track 01 from Single "어느 날 우리 집 현관으로 멸망이 들어왔다 OST Part.7"
Release Date: 2021.06.22
서인국, 정은지 – All For You
Track 01 from Single "응답하라 1997 Love Story Part 1"
Release Date: 2012.08.28
서인국 – 첫눈에 (Feat. 베카 Of 애프터스쿨)
Track 06 from EP "Just Beginning"
Release Date: 2010.05.06