Parodies
- orion heart (1)
- ore no natsuyasumi (1)
- owari no chronicle (1)
- one room (1)
- oemojisangjui | lookism (1)
- ohsama sentai king-ohger (1)
- oira uchuu no tankoufu | mighty space miners (1)
- orfina (1)
- off (1)
- omega strikers (1)
- omniscient readers viewpoint (1)
- okiraku ryoushu no tanoshii ryouchi bouei (1)
- omakase trouble angel (1)
- onechambara bikini samurai squad (1)
- oretachi ni tsubasa wa nai (1)
