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