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  • Watch Oreimo Online

    Oreimo

    Oreimo: For several years, Kyousuke's relationship with his younger sister Kirino has been cold, to the point that they only share greetings. But one day, Kyousuke finds a moe anime DVD fallen in their entry hall.
  • Watch Orenchi no Furo Jijou Online

    Orenchi no Furo Jijou

    Tatsumi is a high school boy who lives by himself. However, a devastatingly handsome merman named Wakasa moves into the bathtub in Tatsumi's home. Wakasa is a bit self-centered but cute, while Tatsumi is cool but a busybody.  
  • Watch Oreshura Online

    Oreshura

    Eita enters high school aiming for the National University School of Medicine. Because of his parents' divorce—and his goal—he shuns anything to do with romance or love.
  • Watch Ôritsu uchûgun Oneamisu no tsubasa Online

    Ôritsu uchûgun Oneamisu no tsubasa

    On a far-off planet, a Kingdom tries to launch the planet's first manned spacecraft. This ten year old project not only faces funding and technical problem, but also is subject to political conspiracy and the neighboring Republic's aggression.
  • Watch Oshiete! Galko-chan Online

    Oshiete! Galko-chan

    Follow the daily school life of Gyaruko-chan, Otako, and Ojyo in this series of comedic short stories. Gyaruko-chan has a tendency to speak rudely, but she's basically friends with everyone. Otako is the quiet loner of the class, but she is good friends with Gyaruko-chan. Ojyo speaks her mind freely and naturally.
  • Watch Otoboku Online

    Otoboku

    Otoboku 2 begins about two years after Mizuho's graduation. The main protagonist Chihaya Mikado was truant at his school because of harassment in the school and of a distrust in men.
  • Watch Otogi sutôrî tenshi no shippo Online

    Otogi sutôrî tenshi no shippo

    Angel Tales: Goro's down on his luck. He keeps losing jobs and has little money.
  • Watch Otome youkai Zakuro Online

    Otome youkai Zakuro

    Otome Youkai Zakuro : In an alternate history of the Meiji era where humans and magical beings known as "younin" live side by side, half-younin girls team up with army lieutenants to fight younin wrongdoers.
  • Watch Ouran High School Host Club Online

    Ouran High School Host Club

    At the ultra prestigious Ouran High School, Haruhi Fujioka looks for a quiet place to read and walks into an unused music room, and accidentally stumbles across the notorious Ouran High School Host Club, a group of boys who entertain the girls of the school for profit. When Haruhi accidentally breaks an expensive vase belonging to the wacky...
  • Watch Outlaw Star Online

    Outlaw Star

    The adventures of an outlaw crew of an advanced starship.
  • Watch Over Drive Online

    Over Drive

    Over Drive: Shinozaki Mikoto is a student who's life is really routine. Going to school, going home, going to school, going home.
  • Watch Overlord Online

    Overlord

    The story begins with Yggdrasil, a popular online game which is quietly shut down one day; however, the protagonist Momonga decides to not log out. Momonga is then transformed into the image of a skeleton as "the most powerful wizard.
  • Watch Overman King Gainer Online

    Overman King Gainer

    Sometime in the distant future, mankind is forced to live in domed cities while the rest of the world is left to recover from years of environmental hardships. In the Siberian Dome-polis, professional gamer Gainer Sanga and mercenary Gain Bijou commandeer an Overman and lead a mass exodus out of the city. (Source: ANN)
  • Watch Owari no Seraph Online

    Owari no Seraph

    One day, a mysterious virus appeared on Earth which killed every infected human over the age of 13. At the same time, vampires emerged from the world's dark recesses and enslaved mankind.
  • Watch Owarimonogatari Online

    Owarimonogatari

    According to a notice displayed at Shosen Book Tower in Akihabara, the anime adaptation of Monogatari Series: Final Season's Owarimonogatari will air on TV in Fall 2015. Production of the series was hinted last week when animator Hiroko Kazui listed Owarimonogatari on her online portfolio.