Orb: On the Movements of the Earth
Otome wa Boku ni Koishiteru: Futari no Elder The Animation
Orange
Onihei
Over the Sky
Oretachi ni Tsubasa wa Nai: Hadairo Ritsu Kyuuwari Zou!?
Otoboku: Maidens are Falling for Me!
Origin: Spirits of the Past
Only Yesterday
Onmyoji
Otaku no Video
One: Kagayaku Kisetsu e