O
Onipan!
Three oni-kids who, through the power of the onipan (a portmanteau of "oni" and "pantsu") become human to help fix the relationship between humans and oni. The three girls transfer into a normal Tokyo high school to aid in their task and help fix their image by revitalizing the town, sometimes jumping headfirst into school events, and other times...becoming idols!
(Source: Crunchyroll News)
TV
Spring 2022
6.48
Oniichan wa Oshimai!
Self-professed "home security guard" Mahiro Oyama has not left his home in years, secluding himself in his room playing erotic visual novels. This depraved lifestyle causes his prodigious sister, Mihari, to worry about his well-being. In hopes of solving this problem, she devises a plan to rehabilitate him back to normalcy.
The first part of Mihari's plan is to concoct a medicine that changes her brother's biological constitution into a bona fide female, much to Mahiro's vehement dismay. Stuck in this predicament, Mahiro has no choice but to live out his life as a cute girl until the effect wears off—if it ever does.
TV
Winter 2023
7.67
Oniichan dakedo Ai sae Areba Kankeinai yo ne!
After their parents' deaths, brother and sister Akito and Akiko Himenokouji were forced to live with separate families for six years. But now they have finally reunited and begin to live together. It quickly becomes apparent that Akiko harbors romantic feelings for her brother; however, Akito only sees her as a sibling.
When three more girls—Anastasia Nasuhara, Arashi Nikaidou, and Ginbei Haruomi Sawatari—move into their apartment, Akiko's hopes of living alone with her brother vanish. Moreover, these girls also like Akito in one way or another, making it even more difficult for Akiko to gain her brother's undivided attention. As the girls fight over who should take care of Akito, they display various eroticisms that may be a little too much for a normal man to handle.
TV
Fall 2012
6.42
Oniichan dakedo Ai sae Areba Kankeinai yo ne! Specials
Short specials included in the Onii-chan Dakedo Ai sae Areba Kankeinai yo ne Blu-rays and DVDs.
Special
Winter 2012
6.21
Onigiri
TV
Spring 2016
Onegai My Melody
TV
Spring 2005
Osomatsu-kun (1988)
TV
Winter 1988
Osananajimi ga Zettai ni Makenai Love Comedy
TV
Spring 2021
Orient
TV
Winter 2022
Onegai My Melody: Kurukuru Shuffle!
TV
Spring 2006
Orient: Awajishima Gekitou-hen
TV
Summer 2022
Oreca Battle
TV
Spring 2014
Ore wo Suki nano wa Omae dake ka yo
TV
Fall 2019
Ore wo Suki nano wa Omae dake ka yo: Oretachi no Game Set
Ova
Winter 2020
Ore no Kanojo to Osananajimi ga Shuraba Sugiru
TV
Winter 2013
Orange
TV
Summer 2016
Overflow
Ona
Winter 2020
Outbreak Company
TV
Fall 2013
Ouran Koukou Host Club
TV
Spring 2006
Overlord: Ple Ple Pleiades - Nazarick Saidai no Kiki
Ova
Winter 2016
Overlord: Ple Ple Pleiades
Special
Winter 2015
Overlord: Ple Ple Pleiades 2
Ona
Winter 2018
Overlord: Ple Ple Pleiades 3
Ona
Winter 2018
Overlord II
TV
Winter 2018
Overlord III
TV
Summer 2018
Overlord IV
TV
Summer 2022
Overlord: Ple Ple Pleiades - Clementine Toubou-hen
Ona
Winter 2018
Ozma
TV
Spring 2012
Owarimonogatari
TV
Fall 2015
Owarimonogatari 2nd Season
TV
Winter 2017
Overtake!
TV
Fall 2023
Overman King Gainer
TV
Fall 2002
Oshiete! Galko-chan
TV
Winter 2016
Oshiete! Galko-chan: Natsuyasumi tte Hontou desu ka?
Ova
Winter 2017
