Similar to 沖縄で好きになった子が方言すぎてツラすぎる

Oda Cinnamon Nobunaga

The Ambition of Oda Nobuna

The Diary of Ochibi-san

Odd Taxi

Odekake Kozame

Otogi-Jūshi Akazukin

Angel Tales

Otogi Zoshi (TV series)

Otogi no Machi no Rena

Otoko no Isshō

Otonanajimi

Trapped in a Dating Sim: The World of Otome Games Is Tough for Mobs

Dear Brother

Me & My Brothers

Ogre Slayer