Opus.COLORs
Otome wa Boku ni Koishiteru: Trinkle Stars The Animation
One: Kagayaku Kisetsu e
Ore no Imouto ga Konnani Kawaii Wake ga Nai. Specials
ORESUKI Are you the only one who loves me? - Our Playball / Our End Run / Our Game
Only Yesterday
OniAi
Ouran High School Host Club
Onmyoji
Ore no Imouto ga Konnani Kawaii Wake ga Nai.: Ore no Imouto ga Konnani Eroge na Wake Nai
Otome wa Boku ni Koishiteru: Futari no Elder The Animation
Osamake: Romcom Where The Childhood Friend Won't Lose