Ore no Imouto ga Konnani Kawaii Wake ga Nai.: Ore no Imouto ga Konnani Eroge na Wake Nai
Oomuro-ke: Dear Friends
Otoboku: Maidens are Falling for Me!
Ore, Tsushima
Oretachi ni Tsubasa wa Nai: Hadairo Ritsu Kyuuwari Zou!?
Origin: Spirits of the Past
Osomatsu-san: Hipipo-Zoku to Kagayaku Kajitsu
Oomuro-ke: Dear Sisters
Onimusha
Otaku Elf
Ore ga Suki nano wa Imouto dakedo Imouto ja Nai Specials
Ozmafia!!