One Piece

Onna no Sono no Hoshi

Owari no Seraph

Ookiku Furikabutte

Ouroboros

Otoyomegatari

Ore to Sex Sureba Ureru - 俺とSEXすれば売れる

Ore ga Ojou-sama Gakkou ni [Shomin Sample] Toshite Rachirareta Ken

Otometeki Syndrome

Onsen Yousei Hakone-chan

Oyaji no Aijin to Kurasu Ore

Onii-chan wa Oshimai

Onee-san wa Joshi Shougakusei ni Kyoumi ga arimasu.

Oneesan to Joshikousei

Ore wo Suki Nano wa Omae Dake ka yo

Ouji-sama Nante Iranai (MIYATA Waltz)

Overlord

Obutsu wa Shoudoku desu

Ore no Megane wa Tabun Sekai Seifuku Dekiru To Omou.

Ore no Mentaru wa Genkai Desu

Oyama! Kikunosuke-san

Oshikake Maid no Shirayuki-San

Ookami Shounen wa Kyou mo Uso wo Kasaneru

Oresama Teacher

Ouji to Majou to Himegimi to

Oukoku Game

Oji-san to Marshmellow

Ore Monogatari!! - 俺物語!

Odette

Ooya-san wa Shishunki! - 大家さんは思春期!

Ookami Heika no Hanayome

Omocha no Ohimesama

Ouji-sama to Haiiro no Hibi - 王子様と灰色の日々

Oshiete! Gyaruko-Chan - おしえて! ギャル子ちゃん

Ochikubo - Ima wa Mukashi no Cinderella Story - おちくぼ

Otouto no Otto - 弟の夫

Osen - おせん

Orfina Saga

Oniichan to Issho

Otoko no Isshou