Full Albums
 Volume 1 - S.T 01 Now
megjelent: November 10., 2006
DSP Entertainment
tracks: 15
★ Existence
★ Four Chance
★ Unlock
★ Again
★ Stand By Me
★ Sky
★ Coward (겁쟁이)
★ Man
★ Hana
★ Confession (서툰고백)
★ Bye Bye
★ Radio Star
★ Wings Of The World (세상의 날개)
★ Warning (경고) (Remix Ver.)
★ Unlock (Heavy Edition Feat. 김세황) (Hidden Track)
Mini Albums
 Mini Album - Find
megjelent: Jlius 28., 2008
DSP Entertainment
tracks: 8
★ 너와 숨쉬다
★ 넌나의천국
★ FIND
★ Thank You (고맙다 - vocal 현중)
★ 넌나의천국-inst.
★ FIND-inst.
★ Saranghae x5 (사랑해x5)
★ Thank You (고맙다- acoustic version)
 Mini Album - U R Man
megjelent: November 21., 2008
Mnet Media
tracks: 6
★ Want It
★ U R Man
★ The ONE
★ Is It Love? (사랑인거죠) (Heo Young Saeng)
★ Never Let You Go (Kim Kyu Jong)
★ I Am (Kim Hyung Jun)
 Mini Album - Collection
megjelent: Jlius 8., 2009
DSP Entertainment
tracks: 6
★ 이름없는 기억 (Nameless Memory) [Heo Young Saeng Solo]
★ Wuss Up [김규종; Kim Kyu Jong Solo]
★ 제발 잘해줘 (Please, Be Nice to Me) [Kim Hyun Joong Solo]
★ 하면은 안돼 (If You Cannot) [박정민; Park Jung Min Solo]
★ Hey G [김형준; Kim Hyung Jun Solo]
★ 비겁하지 않겠어 (I Won't Be a Coward) [Previously released in U R Man (Japan Ver. Edition)]
 Mini Album - Rebirth
megjelent: Oktber 22., 2009
MNet Media
tracks: 5
★ Wasteland
★ Love Like This (네게로)
★ 하루만 (Only One Day)
★ Obsess (중동...)
★ 완.두.콩. (Green Peas)
 Mini Album - Destination
megjelent: Mjus 27., 2010
Mnet media
tracks: 6
★ Let Me Be The One (그게 나라고..)
★ Love Ya
★ Crazy 4 U
★ Until Forever (영원토록) - Lyrics by Heo Young Saeng
★ Let Me Be The One (그게 나라고..) Acoustic Ver.
★ Love Ya (Instrumental)
Original Sound Tracks (OST)
 A Surgeon Bong Dal Hee O.S.T. (SBS TV Series)
megjelent: Februr 13., 2007
CJ Music
tracks: 12
★ Memories of Childhood (어린 날의 기억)
★ Love That Cannot Be Erased (지울 수 없는 사랑)
 Kungya Kungya OST 쿵야쿵야 (KBS Animation)
megjelent: prilis 24., 2007
Maninemedia
tracks: 2
★ Fly Away
★ Fly Away (Go Go Remix)
 Boys Over Flowers O.S.T. (KBS TV Series)
megjelent: Janur 8., 2009
Planet 905
tracks: 2
★ 내 머리가 나빠서 (Because I'm Stupid)
★ 애인만들기 (Making A Lover)
 F4 Special Edition
megjelent: Mjus 19., 2009
Planet 905
★ A Thing Called Happiness (Kim Hyun Joong)
★ Sometimes (SS501)
 친구 - 우리들의 전설 (Friend, Our Legend OST) [MBC TV Drama]
megjelent: Jlius 16., 2009
KT Music
tracks: 1
★ 눈물을 지워가 (I Erase Tears) [허영생; Heo Young Saeng Solo]
Solo Albums
 Park Jung Min - Not Alone
megjelent: Janur 20., 2011
CNR Media
tracks: 6
★ Not Alone
★ 넌 알고 있니 (Do You Know?)
★ 내 하루는 매일매일 크리스마스 (Everyday Is Christmas)
★ Not Alone (Instrumental)
★ 넌 알고 있니 (Do You Know?) (Instrumental)
★ 내 하루는 매일매일 크리스마스 (Everyday Is Christmas) (Instrumental)
 Kim Hyung Jun - My Girl
megjelent: Mrcius 8., 2011
S-Plus Ent.
tracks: 7
★ Angel (Feat. E-Tribe)
★ oH! aH!
★ Girl
★ 다른 여자 말고 너 (Feat. Dok2)
★ Heaven
★ oH aH (Inst.)
★ Girl (Inst.)
 Heo Young Saeng - I'm Broken
megjelent: Mjus 12., 2011
B2M Entertainment
tracks: 5
★ Out The Club (feat. Tae Wan)
★ Let It Go (feat. HyunA)
★ Rainy Heart (feat. Kim Kyu Jong)
★ I'm Broken
★ Let It Go (inst.)
 Kim Hyun Joong - Break Down
megjelent: Jnius 8., 2011
KeyEast Entertainment
tracks: 6
★ Intro (Let Me Go)
★ Break Down (feat. Double K)
★ 제발 (Please)
★ Kiss Kiss
★ Yes I Will
★ 제발 (Please) (inst.)
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