One-Punch Man Season 2
Onipan!
Onigiri
Otome wa Boku ni Koishiteru: Trinkle Stars The Animation
Onihei
Origin: Spirits of the Past
Orphen 2: Revenge
Orange: Mirai
Operation Han-Gyaku-Sei Million Arthur
Orient
Oretachi, Tomodachi!
Otherworldly Munchkin: Let's Speedrun the Dungeon with Only 1 HP!