- 1 OHTORA
- 2 Orangestar
- 3 ONLEE
- 4 OSUM
- 5 OTHANKQ
- 6 One Life
- 7 Omoi
- 8 Odd95
- 9 ONiLL
- 10 Off The Topline
- 11 OSSH
- 12 Otis Lim
- 13 ONCE
- 14 ONSEEON
- 15 OMSB
- 16 OSUN
- 17 Outsider
- 18 oceanfromtheblue(오션)
- 19 Olltii
- 20 oddjun
- 21 Old Yearning
- 22 Osshun Gum
- 23 Oki
- 24 Okid
- 25 OFFVIVID
- 26 Osama Ape
- 27 Owler
- 28 Odd garage
- 29 OVAN
- 30 Option