Shounen

One-In-Seven-Billion Irregular

Onegai, Nugashite.

Onii-chan Is Done For!

Onikirimaru

Onimote

Online Game: I Can Evolve Everything

Only I Know About “Leveling Up” in this World

Ooparts

Opening Bonus of 100 Million Lives

Ora, Yomekko sa ikuda! ~ Kosupure JK no Himitsu no Aijou ~

Ore no Choukyou Skill ga Nanka Hen

Ore wa Akutou de wa Arimasen

Oshi no Idol ga Tonari no Heya ni Hikkoshite Kita

Other World Warrior

Otherworldly Magical Daoist Priest

Otherworldly Skeleton Evolution

Otr of the Flame

Ouji no Torimaki A wa Akuyaku Reijou no Mikata desu

Our Resident Exorcist

Outo no Hazure no Renkinjutsushi – Hazure Shokugyou datta no de, Nonbiri Oten Keiei shimasu

Outrageous! I Opened a Training Class for Empresses

Overbearing Tyrant

Overgeared

Overlord of Insects

Overmortal

Overpowered at 1 HP

Overpowered Healer

Overpowered Sword