Otoboku: Maidens are Falling for Me!
Otome wa Boku ni Koishiteru: Futari no Elder The Animation
Otaku Elf
Onihei
Otaku no Video
Origin: Spirits of the Past
Only Yesterday
One Week Friends
Onsen Yousei Hakone-chan
Owarimonogatari
Orange
Oretachi ni Tsubasa wa Nai: Hadairo Ritsu Kyuuwari Zou!?