Ore no Imouto ga Konnani Kawaii Wake ga Nai
Owarimonogatari
Osomatsu-san: Tamashii no Takoyaki Party to Densetsu no Otomarikai
OniAi
Ouran High School Host Club
Otoboku: Maidens are Falling for Me! Special
OniAi Specials
Orphen
Onsen Yousei Hakone-chan
Otoboku: Maidens are Falling for Me!
Onipan!
Ozmafia!!