One Piece

Overlord

Okusan

Ookiku Furikabutte

Onna no Sono no Hoshi

Ouroboros

Otoyomegatari

Ore to Sex Sureba Ureru - 俺とSEXすれば売れる

Owari no Seraph

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)

Obutsu wa Shoudoku desu

Ore no Megane wa Tabun Sekai Seifuku Dekiru To Omou.

Ore no Mentaru wa Genkai Desu

Okusama ga Seito Kaichou!

Oyama! Kikunosuke-san

Oshikake Maid no Shirayuki-San

Omaera Zenin Mendokusai!

Oresama Teacher

Ouji to Majou to Himegimi to

Oniichan Control

Oukoku Game

Oji-san to Marshmellow

Ore Monogatari!! - 俺物語!

Odette

Ookami to Koushinryou - 狼と香辛料

Ookami Shounen wa Kyou mo Uso wo Kasaneru

Oshiete! Gyaruko-Chan - おしえて! ギャル子ちゃん

Ore no Kanojo ni Nani ka Youkai

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