AiringTV seriesSummer 2026
Oh Boy, Was I Wrong About Her
Comedy · Romance
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FinishedSpecialSummer 2015
Overlord: Ple Ple Pleiades
Action · Comedy · Fantasy
FinishedTV seriesSummer 2010
Occult Academy
Comedy · Mystery · Sci-Fi · Supernatural
FinishedTV seriesSpring 2024
Oblivion Battery
Comedy · Sports
FinishedONAWinter 2022
The Orbital Children
Adventure · Sci-Fi
FinishedFilmSpring 2006
One Piece: Mega Mecha Soldier of Karakuri Castle
Adventure · Comedy · Fantasy
FinishedFilmSpring 2022
ODDTAXI In The Woods
Drama · Mystery · Psychological · Thriller
AiringOVASpring 2010
ONE PIECE FILM: STRONG WORLD - EPISODE:0
Action · Adventure · Comedy · Fantasy
FinishedTV seriesSummer 2022
ORIENT Part 2
Action · Adventure · Comedy · Fantasy
FinishedOVASummer 2016
Overlord: Ple Ple Pleiades - Nazarick Saidai no Kiki
Action · Comedy · Fantasy
AiringFilmSpring 2007
One Piece: The Desert Princess and the Pirates, Adventures in Alabasta
Action · Adventure · Fantasy
FinishedONASummer 2021
Obey Me!
Comedy · Supernatural
FinishedTV shortSummer 2018
One Room SECOND SEASON
Romance · Slice of Life
FinishedTV shortWinter 2016
Ojisan and Marshmallow
Comedy · Romance · Slice of Life
AiringFilmSpring 2008
One Piece: Episode Of Chopper +: The Miracle Winter Cherry Blossom
Action · Adventure · Comedy · Fantasy
AiringTV seriesSummer 2026
The Oblivious Saint Can't Contain Her Power
Drama · Fantasy · Romance
AiringTV seriesSummer 2026
The Ogre's Bride
Drama · Fantasy · Romance
FinishedTV shortWinter 2016
Ooya-san wa Shishunki!
Comedy · Slice of Life
AiringOVASummer 1998
One Piece: Defeat the Pirate Ganzack!
Adventure · Comedy · Fantasy
FinishedONASpring 2023
Ōoku: The Inner Chambers
Drama · Romance · Slice of Life
FinishedTV seriesSummer 2025
Onmyo Kaiten Re:Birth Verse
Action
FinishedOVASpring 2015
Ookami Shoujo to Kuro Ouji: Gishinanki – Happening kiss
Comedy
UpcomingTV series
One Punch Man Season 3 Part 2
Action · Comedy · Sci-Fi · Supernatural
FinishedMusic
On Your Mark
Drama · Sci-Fi
Data: AniList