- ODD FUTURE(通常盤)UVERworld
- ODD FUTURE short ver.UVERworld
- Ordinary ThingsHinder (缓冲乐队)
- Operation: OverloadSlushii
- One EightyAmbrosia (神的食物)
- 톡톡 (Original Ver.) (TOK TOK)마이티 마우스 (Mighty Mouth)
- 슬픔의 송가 (Ode to Sorrow)크레페 (Crepe)
- OchreAmbrosia (神的食物)
- On A HillL3V3LS
- OkayFox Stevenson
- Open Your EyeL3V3LS
- Out My Head (Fox Stevenson & Feint Remix) [Explicit]Fox Stevenson
- Only PlayingNico（妮可） (妮可·罗宾)
- Old Classic Piano Songs: My RomanceThe O'Neill Brothers (奥尼尔兄弟)
- 생존남녀 OST (Gender Survival : In the Wood)나다 (Nada)
- Oh My GodLinda Sundblad (琳达·桑布莱德)
- One More Time (再多一次)클론 (酷龙)
- Op På HestenNik & Jay (尼克和杰)
- On Broadway With The O'Neill BrothersThe O'Neill Brothers (奥尼尔兄弟)
- One More Time클론 (酷龙)
- On My OwnTroyBoi
- Out With a Bang (feat. Jessica Sutta) - SingleJessica Sutta (杰斯卡·苏塔)
- Ode to SilenceJason Wade
- OKGO빈지노 (Beenzino)
- Original Album ClassicsIggy Pop (伊吉·帕普)
- Only YouKatie Sky (凯蒂·斯凯)
- On eBayKatie Sky (凯蒂·斯凯)
- 후궁: 제왕의 첩 OST ("后宫:帝王之妾" OST)서영은 (徐英恩)
- Over Your ShoulderChromeo
- Old 45'sChromeo
- 가족관계증명서 OST Part.2 (亲属关系证明 OST Part.2)서영은 (徐英恩)
- 내사랑 치유기 OST Part.9 (我的爱情治愈记 OST Part.9)서영은 (徐英恩)
- Orinoco FlowCeltic Woman (凯尔特女人)
- 무사 백동수 OST Part.5 (武士白东秀 OST Part.5)서영은 (徐英恩)
- 흑기사 OST PART. 1 (黑骑士 OST Part.1)서영은 (徐英恩)
- Over The RainbowCeltic Woman (凯尔特女人)
- 군주 - 가면의 주인 OST Part.10 (君主 - 假面的主人 OST Part.10)서영은 (徐英恩)
- 연애시발.(점) OST Part.3 (웹드라마)(Start Dating (Original Drama Soundtrack, Pt. 3))서영은 (徐英恩)
- 김과장 OST Part. 6 (Good Manager (Original Television Soundtrack) Pt. 6)서영은 (徐英恩)
- 바다 위의 피아노 OST (A Piano on the sea Original Soundtrack - Well Done)서영은 (徐英恩)
- 사랑이 온다 OST Part.17 (爱情来了 OST Part.17)서영은 (徐英恩)
- One Christmas: Chapter OneLeAnn Rimes (黎安·莱姆丝)
- ohhh!Chara (佐藤美和)
- Original Album ClassicsDan Fogelberg (丹·弗吉尔伯格)
- ONEEver
- 맹부삼천지교 O.S.T김준석 (金俊锡)
- 띠링 On The Phone제이디 (JD)
- 러브러브 체인지: 사랑은 루나, 고백은 한별, 흔들린 건 우주 OST '짙은밤(Deep Night)'(LOVE LOVE CHANGE : one fine day (Original Television Soundtrack) 'Deep Night') (Love Love Change: 爱情是月亮，告白是星星，动摇的是宇宙 OST '深夜')제이디 (JD)
- Out in the Middle / Old Love SongZac Brown Band (扎克·布朗乐队)
- Only Love, L (More Love Edition) [Explicit]Lena
- 동네의 영웅 OST Part.2 (Local Hero OST Part.2) (邻家英雄 OST Part.2)나윤권 (罗允权)
- 상어 OST '몇 날 며칠' (鲨鱼 OST '几天几夜')나윤권 (罗允权)
- 아버지가 이상해 OST Part. 1나윤권 (罗允权)
- 들켜라 내 마음 (Oops, My Heart)MJ (써니사이드)
- 사랑은 뷰티풀 인생은 원더풀 OST Part.6 (美丽爱情完美人生 OST Part.6)나윤권 (罗允权)
- OptimisticLena
- 태풍 (Original Motion Picture Soundtrack)나윤권 (罗允权)
- 트라이 OST Part.5 (TRY：我们成为奇迹 OST Part.5)나윤권 (罗允权)
- Over누디 (Nu.D)
- 착한 사나이 OST Part.5 (The Nice Guy (Original Television Soundtrack) Pt.5) (善良的他 OST Part.5)나윤권 (罗允权)
