Supernatural

Onijari

Oroka na Tenshi wa Akuma to Odoru

Oswald the Overman in the Lesser Planes of Hell

Raul and The Vampire

Raul to Kyuuketsuki

Rebirth in the end times: I reached the top by opening boxes

Rebirth of King Zhou: Not Being the Ultimate Villain

Reborn as a Demonic Cultivator, Picking Up a Zombie Planet at the Start

Red Storm

Rosen Garten Saga