| Title | Author | Score | Date | Comments |
|---|---|---|---|---|
| Odin: Photon Space Sailer Starlight | sothis | 6.5/10 | Nov 27, 2004 | 0 |
| Old Crocodile | valondar | 8/10 | Jan 30, 2009 | 0 |
| One Outs | VivisQueen | 6.7/10 | Jun 22, 2009 | 2 |
| One Piece | vivafruit | 7.5/10 | Mar 14, 2005 | 10 |
| One Pound Gospel | sothis | 6/10 | Jan 29, 2005 | 0 |
| On Your Mark | sothis | 5.8/10 | Apr 2, 2008 | 0 |
| Origin: Spirits of the Past | VivisQueen | 4.9/10 | Jan 18, 2008 | 2 |
| Oseam | Sheex | 8/10 | Mar 23, 2009 | 0 |
| Ouran High School Host Club | vivafruit | 7.5/10 | Apr 12, 2007 | 5 |
| Over Drive | babyeinstein12 | 7/10 | Aug 28, 2009 | 0 |
