| Oneechan ga Mamotte Ageru! Manga |  | Kairi Shinonome's younger twin brother, Anri, has been dressed as a girl since birth by their mother. One day, Anri goes to an idol audition. Kairi cross-dresses as well to go and stop him, but unexpectedly they both end up scouted as idols! |
| Ore no Kouhai ga Konna ni Kawaii Wake ga Nai Manga |  | |
| Ojousama no Himitsu Manga |  | After transferring from an elite girls school, Haru, by her expression and manner, is seen by many as an Ojou-sama. But in truth Haru really is a countryside chick with a fierce attitude! Though she tries not be discovered, she is seen in an unlikely situation by none other but a classmate,... |
| Ore no Subete ga Kimi no Mono Manga |  | Since Masumi's childhood confessed to her suddenly two years ago on Christmas, Masumi has become interested in him. However, she is unable to show him her feelings because of her pride and insecurity. Could his feelings still remain even after her insincere rejection? |
| Ore ga Akuma de, Aitsu ga Yome de Manga |  | Demons will grant any human one wish in exchange for their soul. Anzam Nia, an ambitious demon, has fallen to the bottom of the chart, having collected zero souls. After being kicked out to earth by the police, he found himself in Japan, in search of a human contractor in order to get back home.... |
| Otona Pink Manga |  | Mikuni is the daughter of a single-mother who attends high school. She falls for with Chiho, and just when they are about to have their first kiss they are interrupted - by their teacher! He tells her that her and Chiho will only last three months.
When Mikuni’s mother goes away on business... |
| Orange Chocolate Manga |  | A romantic comedy with a distinctly Japanese flavor. Next-door neighbors Chiro and Ritsu have been best friends since childhood. Ritsu, the eldest son of a family of traditional nichibu dancers, is thrust into the public eye as his career takes off, and his growing fame begins to test the pair’s... |
| Ordinary School Manga |  | Nareh and Tareh are fraternal twins, Nareh the elder sister and Tareh the younger brother. When Nareh learns that Tareh has been accepted into the all-boys Ordinary School, she is shocked, and prepared to stop him at all costs.. |
| Onii-chan Control Manga |  | Hirose Goushi has a huge sister complex. So huge, he moves from his home town to Tokyo to attend Myouzen University in order to escape it!
Three years later, Goushi's little sister Noa shows up and informs him that she's taking the Myouzen University entrance exam and that she will be moving in if... |
| Oouso Swing Manga |  | "Everyday, no matter what, we tell some sort of lie."
Shirose Sayo has always been mildly interested in Saeki Aoi, mainly because he’s different from the other guys in her class. However, upon graduating middle school, Sayo’s image of Saeki is destroyed and she finds he is not the mature... |
| Ore no Kanojo to Osananajimi ga Shuraba Sugiru 4-Koma Manga |  | Spin off of the popular light novel, follows in 4 koma version the spats between the honor student Kidou Eita, his "handsome girlfriend" Natsukawa Masuzu and his "hyper active" childhood friend Harusaki Chiwa.
Rather than "a story" placed on a continuity, it's a bunch of 4' skits and jokes... |
| Otome no Iroha! Manga |  | Iroha, a masculine girl and Hifumi, a feminine boy are siblings who has transfered to a different middle school and moved to their grandparents house. However, after the first night much to their surprise... |
| Otaku no Musume-san Manga |  | Kanau Yukimura is nine years old, she’s meeting her father for the first time. However, he turns out to be an otaku! The two of them start living together in the same apartment, next to a lot of interesting neighbors. Unsurprisingly, things don’t always go smoothly for these two... |
| Otogimoyou Ayanishiki Manga |  | Suzu, an ordinary girl who possess extra-ordinary power to summon demons, was left with a flute, the only keepsake of her disappearing ‘Father’. In the flute, dwelt the guardian spirit who responds to her plea in danger. |
| Obito no Hime to Kubinashi Kishi Manga |  | |
