| Name | Total | ... |
|---|---|---|
| Osananajimi wa, JK Ponyta | 0 | GO |
| Osawari Dairoku | 2 | GO |
| Oscilloscope | 2 | GO |
| Oshaburi Gakuen Pinsalka | 4 | GO |
| Oshiete MY HONEY | 3 | GO |
| Oshigoto After | 8 | GO |
| Oshigoto Theater | 7 | GO |
| Oshikake LOVE AYA | 0 | GO |
| Oshikake Nyanko | 0 | GO |
| Oshikake Riot | 2 | GO |
| Oshikko Sensei | 6 | GO |
| Oshino-San-chi no Shinobu-chan | 3 | GO |
| Oshioki Mafuo | 1 | GO |
| Osozaki no Hana | 2 | GO |
| Ota x Gal | 2 | GO |
| Otegaru Saimin | 2 | GO |
| Other Zone | 5 | GO |
| Otoguro Miya no Oasobi | 3 | GO |
| Otoko to Onna no Aru Aru Banashi | 2 | GO |
| Otokonoko Fuuzoku de Onnanoko Mitai ni Ikasarechau Anthology | 0 | GO |
| Otokonoko Gakuen | 2 | GO |
| Otokonoko HEAVEN Vol. 20 | 0 | GO |
| Otokonoko HEAVEN Vol. 22 | 0 | GO |
| Otokonoko HEAVEN Vol. 41 | 3 | GO |
| Otokonoko to Iku! Shuugaku Ryokou | 2 | GO |
| Otome Dori | 2 | GO |
| Otome Drops | 2 | GO |
| Otome Kuzushi | Otome Slave | 4 | GO |
| Otomehime | 5 | GO |
| Otona Fate to Kodomo Nanoha | 2 | GO |
| Otona No Dagashi | 4 | GO |
| Otona OS 2/18 | 1 | GO |
| Otona OS 2/19 | 1 | GO |
| Otonano Do-wa | 1 | GO |
| Otonano Omochiya | 1 | GO |
| otonari no moto Sakura-san | 3 | GO |