Overtake!
Onmyoji
Only Yesterday
Onihei
Otoboku: Maidens are Falling for Me!
Our love has always been 10 centimeters apart.
Oretachi ni Tsubasa wa Nai: Hadairo Ritsu Kyuuwari Zou!?
Orange: Mirai
Over the Sky
Otome wa Boku ni Koishiteru: Futari no Elder The Animation
Origin: Spirits of the Past
One: Kagayaku Kisetsu e