Romance

12 eps OneRoom TV · 2017

12 eps OniAi TV · 2012

6 eps OniAi Specials Special · 2013

1 ep Only Yesterday Movie · 1991

Details only Ookami to Koushinryou: MERCHANT MEETS THE WISE WOLF 2nd Season TV

10 eps Ōoku: The Inner Chambers ONA · 2023

13 eps Orange TV · 2016

1 ep Orange: Future Movie · 2016

4 eps Ore no Imouto ga Konna ni Kawaii Wake ga Nai TRUE ROUTE ONA · 2011

13 eps Oreimo 2 TV · 2013

3 eps Oreimo 2 (ONA) ONA · 2013

2 eps Details only Oreimo 2: My Little Sister Can't Be This Eroge Special · 2014

13 eps Oreshura TV · 2013

12 eps ORESUKI: Are you the only one who loves me? TV · 2019

1 ep ORESUKI: Are you the only one who loves me?: Our Playball / Our End Run / Our Game OVA · 2020

1 ep Origin: Spirits of the Past Movie · 2006

1 ep Osakana wa Ami no Naka OVA · 1994

12 eps Osamake: Romcom Where The Childhood Friend Won't Lose TV · 2021

12 eps Details only Otoboku: Maidens are Falling for Me TV · 2006

3 eps Details only Otoboku: Maidens are Falling for Me 2 OVA · 2012

1 ep Otohime CONNECTION OVA · 1991

1 ep Details only Otome wa Boku ni Koishiteru Special Special · 2007

1 ep Details only Otome wa Boku ni Koishiteru: Mittsu no Kiraboshi - The Animation OVA · 2022

2 eps Otome Youkai Zakuro Picture Drama Special · 2010