Our love has always been 10 centimeters apart.
Onmyoji
One: Kagayaku Kisetsu e
Only Yesterday
One Week Friends
Oretachi ni Tsubasa wa Nai: Hadairo Ritsu Kyuuwari Zou!?
Overtake!
Orange
Orange: Mirai
Onihei
Otoboku: Maidens are Falling for Me!
Origin: Spirits of the Past