Otoboku: Maidens are Falling for Me!
Ozmafia!!
ORESUKI Are you the only one who loves me?
Oomuro-ke: Dear Sisters
Otome wa Boku ni Koishiteru: Trinkle Stars The Animation
Outbreak Company
Orange: Mirai
Otome wa Boku ni Koishiteru: Futari no Elder The Animation
Onyankopon
Onimai: I'm Now Your Sister!
ORESUKI Are you the only one who loves me? - I Politely Move Things Forward
Onigiri