Manga List (Starts with "O")
- One Piece
- Ouran High School Host Club
- Oresama Teacher
- One Outs
- Omamori Himari
- Onihime VS
- Okane ga Nai
- Otomen
- Oniichan Control
- Ookami to Koushinryou
- Otomari Honey
- Onidere
- Oniichan no Koto Nanka Zenzen Suki ja Nai n da kara ne!!
- Okujouhime
- Ookamitachi no Shiikuhou
- Otokonoko Zukan
- Order wa Boku de Yoroshii desu ka
- Ore no Kouhai ga Konna ni Kawaii Wake ga Nai
- Obaka chan Koigatariki
- Otomentaru
- Orange Marmalade
- Ohimesama no Yurikago
- Otoshite Appli Girl
- Ookami Shoujo to Kuro Ouji
- OA
- Ookami Shounen
- Oishii Kankei
- Ojou sama wa Oyome sama
- Ojousama no Inu
- One Winter