Action

Oumagadoki Doubutsuen

Ouritsu Mahou Gakuen no Saikasei: Slum Agari no Saikyou Mahoushi, Kizoku darake no Gakuen de Musou suru

Ousama Ranking

Out (MIZUTA Makoto)

Outcast

Outreijou

Outside Of The Attribute, I Picked Up A Girl

Overbearing Tyrant

Overgeared (Team Argo)

Overlord