Shounen

Omiai Shitakunakattanode, Muri Nandai Na Jouken Wo Tsuketara Doukyuusei Ga Kita Ken Ni Tsuite

One in seven billion irregular (One-of-a-Kind Irregular)

One Piece

One Step Closer to the Demon King

Onikirimaruden

Only I Know That the Villainess Is Actually a Good Girl With a Beautiful Heart

Only My Undesirable Translation Talent Can Change the World

Only Sense Online

Onnamaou-Sama Wa Yuusha-Kun O Taosenai.

Orc no Shuhai ni Shukufuku wo

Ore Dake Ijin Gacha Mawasete Saikyou no Sekai

Ore Igai Dare mo Saishu Dekinai Sozai

Ore no Ie ga Maryoku Spot datta Ken – Sundeiru dake de Sekai Saikyou

Ore no Kurasu ni Wakagaetta Moto Yome ga Iru

Ore wa Subete o “Parry” Suru: Gyaku Kanchigai no Sekai Saikyou wa Boukensha ni Naritai

Ore wa Subete wo “Parry” Suru

Osabori Jouzuna Komukai-san wa Ore wo Nogasanai!!

Otokogumi

Otome Game no Heroine de Saikyou Survival

Outo no Hazure no Renkinjutsushi: Hazure Shokukyou Datta node, Nonbiri Omise Keiei Shimasu