| Name | Total | ... |
|---|---|---|
| Ore, Bishoujo Senshi Yamemasu | 0 | GO |
| Oreimo Binetsu Chuuihou | 4 | GO |
| Orekko Haiboku | 2 | GO |
| Ore-tachi Tsukiattemasun. | 5 | GO |
| Oreteki Massuru G | 2 | GO |
| Ori no Naka no Illya-chan | 1 | GO |
| ORNX | 2 | GO |
| Oroshi Ninniku, Atari | 2 | GO |
| orugouru | 1 | GO |
| Osaekirenai kono Kimochi | 5 | GO |
| Osaka Bitch | 3 | GO |
| Osananajimi | 2 | GO |
| Osananajimi Ecchi | 2 | GO |
| Osananajimi ga Mama to Yatte Imasu. | 0 | GO |
| Osananajimi no Onna Kishi ga Oujo ni Naru Made Zenpen | 2 | GO |
| Osananajimi to Diet | 2 | GO |
| Osawari Dairoku | 2 | GO |
| Oscilloscope | 2 | GO |
| Oshaburi Gakuen Pinsalka | 4 | GO |
| Oshiete MY HONEY | 3 | GO |
| Oshigoto After | 8 | GO |
| Oshigoto Theater | 6 | GO |
| Oshikake LOVE AYA | 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 | 1 | 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 | 3 | GO |
| Otokonoko HEAVEN Vol. 20 | 0 | GO |
| Otokonoko HEAVEN Vol. 22 | 0 | GO |