Action

One Step Divine Fist

One Step to Being Dark Lord

One Step Toward Freedom

One Sword Reigns Supreme

One Thousand Live Broadcast Big Local Tyrant

One-In-Seven-Billion Irregular

One-Punch Man

One-Timer

Onikirimaru

Online Game: I Can Evolve Everything

Only I Have an EX-Grade Summon

Only I Know About “Leveling Up” in this World

Onna Kishi to Kemomimi no Ko

Onna Majutsushi-san, Moto no Sekai e Kaeru Tame ni Ganbarimasu

Ooparts

Opening Bonus of 100 Million Lives

Orc Hero Story – Discovery Chronicles

Ore dake Chou Tensai Renkinjutsushi – Yurui Atelier Seikatsu Hajimemashita

Ore no Buki wa Saijaku Dakedo Level Up suru Rashii

Ore no Choukyou Skill ga Nanka Hen

Ore no Genjitsu wa Ren’ai Game?? ka to Omottara Inochigake no Game datta

Ore no Vaccine dake ga Zombie shita Sekai wo Sukueru

Ore no vaccine dake ga zonbi-ka shita sekai o sukueru

Ore To Seijo Ga Dekiteru Koto Ga Baretara Kono Party Wa Houkai Suru

Ore wa Akutou de wa Arimasen

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

Osananajimi wa Yami Ochi Seijo!

Oshikake Assassin-chan wa Outo Saikyou no Kanban Musume

Ossan Boukensha no Okureta Eiyuu-tan – Kansha no Suburi o 1 nichi 1 man Kaishite itara, Kensei ga Deshi-iri Shigan ni Yatte Kita

Ossan Isekai de Saikyou ni Naru: Butsuri Tokka no Kakusei-sha

Other World Warrior

Others level up, I cultivate—emerging only at Great Ascension

Otherworldly Evil Monarch

Otherworldly Magical Daoist Priest

Otherworldly Skeleton Evolution

Otoko Ippiki Gaki Daishou

Otome Game no Heroine de Saikyou Survival

Otome Sensou

Otr of the Flame

Our Resident Exorcist