Romance
Oshaberi Na Jikanwari- Oshiete, Natsu.
- Oshitone Tenzen
- Ososugita Saikai
- Ossu! Ren'ai Gakuen
- Othello (Otsu Hiyori)
- Othello (Shoujo)
- Othello.
- Otodokeshimasu
- Otogi Story Tenshi No Shippo
- Otokonoko Wa Hachimitsu
- Painful Love Iii
- Otona Keikenchi
- Otona No Manaa
- Otoshimono
- Ou To Hiyaku
- Oubou Ookami To Akazukin
- Ouchi E Kaerou
- Ouji Na Geboku No Aishikata
- Kiss Ni Renzoku
- H.e - The Hunt For Energy
- Akuma De Keiyaku
- Transient Flower
- Ore No Kanojo Ga Stalker Na Ken
- Time Machine Wa Uso O Tsuku
- Omukae Desu
- Amagami - Love Goes On! - Sakurai Rihoko Hen
- Shuugaku Ryokou No Susume
- Yuki, Tokidoki Suki
- Haru No E
- Gosick W
- Leave
- Kuchibiru Kara Toketeiku
- Soshite Koyoi Wa Kimi Ni You
- Kisei Kanojo Sana - Parasistence Sana
- Perfect Rose
- Kanojo Ga Flag O Oraretara
- Land Escape
- Futsu Hyakkei
- Li Ren Man
- Kiss Kara Hajimeyou
- Ouji To Joujin
- Oujisama No Boku
- Oujisama No Tsukurikata
- Seishun Trickers
- Oujisama Wo Tsukamaero!
- Oujitachi Wa Izonsuru
- Ousama Game (Shoujo)
