Obey Me!

Occultic;Nine

Oda Cinnamon Nobunaga

Oda Nobuna no Yabou

Odd Taxi

Oemojisangjuui

Oira Sukeban

Ojii-san no Lamp

Oji-san to Marshmallow

Ojou-sama Sousamou

Okane ga Nai

Okane ga Nai Specials

Okoshiyasu, Chitose-chan

Okusama ga Seitokaichou!

Okusama ga Seitokaichou!+!

Okusama wa Joshikousei

Omae Umasou da na

Omae wa Mada Gunma wo Shiranai

Omamori Himari

Omiai Aite wa Oshiego, Tsuyoki na, Mondaiji.

Omoide no Marnie

Omoide Poro Poro

Omoi Gumo

Omoi no Kakera

Omoi, Omoware, Furi, Furare