ORESUKI Are you the only one who loves me? - I Politely Move Things Forward
OniAi Specials
Onimai: I'm Now Your Sister!
Overlord: The Sacred Kingdom
Ore no Imouto ga Konnani Kawaii Wake ga Nai.
Onipan!
Orphen 2: Revenge
Osomatsu-san Movie
Otoboku: Maidens are Falling for Me! Special
Overlord
Origin: Spirits of the Past
Overlord: The Undead King