- 우아한 가 OST Part.1 (优雅的家 OST Part.1)임정희 (林贞熙)
- 나인룸 (Original Television Soundtrack), Pt. 1 (九号房间 (Original Television Soundtrack), Pt. 1)임정희 (林贞熙)
- 맨홀 OST Part.3 (MANHOLE OST Part.3)산들 (灿多)
- 효심이네 각자도생 OST Part. 1 (孝心呀 各自营生 OST Part. 1)임정희 (林贞熙)
- 투깝스 OST Part.6임정희 (林贞熙)
- OTAKEBIGReeeeN (グリーン)
- 다섯손가락 OST Part.1임정희 (林贞熙)
- Oneway GenerationThinking Dogs
- On Our Way Home (EP)Empire Of The Sun
- OverthinkWale (威尔)
- Overthink (Explicit)Wale (威尔)
- Old Boots, New DirtJason Aldean (杰森·阿尔丁)
- 사랑만 할래 (Original Television Soundtrack) Pt. 2 (只想爱 O.S.T Part.4)비트윈 (BEATWIN)
- 수상한 파트너 OST Part.6 (SBS 수목드라마) (Suspicious Partner) (奇怪的搭档 OST Part.6)범키 (Bumkey)
- 러블리 호러블리 OST Part.3 (Lovely Horribly OST Part.3)범키 (Bumkey)
- 훈남정음 OST Part.6 (勋男正音 OST Part.6)범키 (Bumkey)
- (아는 건 별로 없지만) 가족입니다 OST Part 1 (My Unfamiliar Family OST Part 1)범키 (Bumkey)
- 감당 안 돼 (October Sky)범키 (Bumkey)
- On My Way범키 (Bumkey)
- 그녀는 예뻤다 OST Part 6 (她很漂亮 OST Part.6)박서준 (朴叙俊)
- 킬미힐미 O.S.T Part.5 (杀了我治愈我 O.S.T Part.5|Kill Me Heal Me O.S.T Part.5)박서준 (朴叙俊)
- 화랑 OST Part 9 (HWARANG, Pt. 9 (Music from the Original TV Series)) (花郎 OST Part. 9)박서준 (朴叙俊)
- On and OnAll-4-One (四个人乐队)
- Only YouPortishead
- Our Fair Lady - The Divine Julie AndrewsJulie Andrews (茱莉·安德鲁斯)
- OverPortishead
- One In A MillionAl Green (艾尔·格林)
- Oceans DeepSONSOFDAY (天之子)
- Off 2 Work / Graftin'Dizzee Rascal (迪兹·雷斯科)
- One Day It'll All Make SenseCommon (凡夫俗子)
- One Day It'll All Make Sense (Explicit)Common (凡夫俗子)
- Only Human케이 (K)
- over...케이 (K)
- Overdrop시우민 (XIUMIN)
- 사장돌 마트 OST Part.1 (CEO-dol Mart (Original Television Soundtrack) Pt. 1) (社长豆超市 OST Part.1)시우민 (XIUMIN)
- 철인왕후 OST Part. 7 (哲仁王后 OST Part.7)시우민 (XIUMIN)
- 우리, 집 OST Part.3 (Bitter Sweet Hell) (我们家 OST Part.3)케이 (K)
- Ordinary LoveA.C.T.
- One DanceMKJ
- On And On (When the Lights Go Down)Akcent
- Of the Night (The Rhythm of the Night)A.C.T.
- Older & None The Wiser (TEN PROJECT, Pt. 7) [feat. Jung Seul Gi & KANTO]Miss $ (미스에스)
- Only Teardrops (Originally Performed By Emmelie De Forest)A.C.T.
- OCDLogic
- OCD (Explicit)Logic
- Oxymoron (Deluxe Version)Schoolboy Q
- Old Logic (Explicit)Logic
- O Holy NightIL Divo (美声男伶)
- OxymoronSchoolboy Q
- Officially Missing You (In the Style of Tamia) [Karaoke Version] - SingleProSource Karaoke (专业卡拉ok)
- Our Song (In the Style of Taylor Swift) [Karaoke Version] - SingleProSource Karaoke (专业卡拉ok)
- One DayLogic
- Oklahoma BreakdownToby Keith (托比·凯斯)
- Oxymoron (Explicit)Schoolboy Q
- ODD FUTUREUVERworld
- One LifeUVERworld
- One ThousandDennis Kuo
- One Step at a Time (In the Style of Jordin Sparks) [Karaoke Version] - SingleProSource Karaoke (专业卡拉ok)
- On my Sheep (在我的绵羊身上)米澤円 (米泽圆)
- OneThe O'Neill Brothers (奥尼尔兄弟)
